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posted 2018-11-14 17:54:53 +0300

Owncloud shared Calendar don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

Owncloud shared Calendar don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

I do not have write permission on this calendar. Could that be the issue?

Owncloud shared Calendar Calendars from others don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

I do not have write permission on this calendar. Could that be the issue?

Owncloud shared Calendars from others don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

I do not have write permission on this calendar. Could that be the issue?

[edit] For testing I got write permisson on the calendar. After getting that the update worked. So I think this is really a bug. The update process should not abort if it cannot write to the calendar or check if it is a read only calendar.

Owncloud shared Calendars from others read only calendars don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

I do not have write permission on this calendar. Could that be the issue?

[edit] For testing I got write permisson on the calendar. After getting that the update worked. So I think this is really a bug. The update process should not abort if it cannot write to the calendar or check if it is a read only calendar.

Owncloud read only calendars don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

I do not have write permission on this calendar. Could that be the issue?

[edit] For testing I got write permisson permission on the calendar. After getting that the update worked. So I think this is really a bug. The update process should not abort if it cannot write to the calendar or check if it is a read only calendar.

[edit] As requested here are some more lines from the log file. I found two instances were the phone found some exceptions that need to be uploaded. This is wired since I did not make any changes to the shared calendar and I am sure that it was up to date.

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Discarding exdate: "2018-10-09T18:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 1 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - "Content-Length : 2467"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"

And the lines right before the error message:

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Already handled local modification 0 via series update
[D] unknown:0 - Already handled local modification 1 via series update
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: "
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Ignoring SSL error response

Owncloud read only calendars don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

[edit] For testing I got write permission on the calendar. After getting that the update worked. So I think this is really a bug. The update process should not abort if it cannot write to the calendar or check if it is a read only calendar.

[edit] As requested here are some more lines from the log file. I found two instances were the phone found some exceptions that need to be uploaded. This is wired since I did not make any changes to the shared calendar and I am sure that it was up to date.

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Discarding exdate: "2018-10-09T18:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 1 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - "Content-Length : 2467"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"

And the lines right before the error message:

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Already handled local modification 0 via series update
[D] unknown:0 - Already handled local modification 1 via series update
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: "
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Ignoring SSL error response

[edit]

I tried get additional information as requested below but I am not a programmer or do have programming skills so I hope that helps. If not please give me an in detailed step by step instruction.

The event in question is a serial event. The start dates is odd it is 1996, which is for sure not the date it was created.

[D] unknown:0 - "</cal:calendar-data>"
[D] unknown:0 - "   </d:prop>"
[D] unknown:0 - "   <d:status>HTTP/1.1 200 OK</d:status>"
[D] unknown:0 - "  </d:propstat>"
[D] unknown:0 - " </d:response>"
[D] unknown:0 - " <d:response>"
[D] unknown:0 - "  <d:href>/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics</d:href>"
[D] unknown:0 - "  <d:propstat>"
[D] unknown:0 - "   <d:prop>"
[D] unknown:0 - "    <d:getetag>&quot;f73d4f9bed03ef25f447a0310445f5e9&quot;</d:getetag>"
[D] unknown:0 - "    <cal:calendar-data>BEGIN:VCALENDAR"
[D] unknown:0 - "CALSCALE:GREGORIAN"
[D] unknown:0 - "PRODID:-//Apple Inc.//iOS 10.3.3//EN"
[D] unknown:0 - "VERSION:2.0"
[D] unknown:0 - "BEGIN:VTIMEZONE"
[D] unknown:0 - "TZID:Europe/Berlin"
[D] unknown:0 - "BEGIN:DAYLIGHT"
[D] unknown:0 - "DTSTART:19810329T020000"
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU"
[D] unknown:0 - "TZNAME:MESZ"
[D] unknown:0 - "TZOFFSETFROM:+0100"
[D] unknown:0 - "TZOFFSETTO:+0200"
[D] unknown:0 - "END:DAYLIGHT"
[D] unknown:0 - "BEGIN:STANDARD"
[D] unknown:0 - "DTSTART:19961027T030000"
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU"
[D] unknown:0 - "TZNAME:MEZ"
[D] unknown:0 - "TZOFFSETFROM:+0200"
[D] unknown:0 - "TZOFFSETTO:+0100"
[D] unknown:0 - "END:STANDARD"
[D] unknown:0 - "END:VTIMEZONE"
[D] unknown:0 - "BEGIN:VEVENT"
[D] unknown:0 - "CREATED:20170520T091156Z"
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20170704T220000"
[D] unknown:0 - "DTSTAMP:20181004T070017Z"
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20170704T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171024T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171107T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180710T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180717T180000"
[D] unknown:0 - "LAST-MODIFIED:20180703T205812Z"
[D] unknown:0 - "RRULE:FREQ=WEEKLY"
[D] unknown:0 - "SEQUENCE:0"
[D] unknown:0 - "SUMMARY:K"
[D] unknown:0 - "TRANSP:OPAQUE"
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "END:VEVENT"
[D] unknown:0 - "BEGIN:VEVENT"
[D] unknown:0 - "CREATED:20181004T070013Z"
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20181009T220000"
[D] unknown:0 - "DTSTAMP:20181004T070017Z"
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20181009T180000"
[D] unknown:0 - "LAST-MODIFIED:20181004T070013Z"
[D] unknown:0 - "RECURRENCE-ID;TZID=Europe/Berlin:20181009T180000"
[D] unknown:0 - "SEQUENCE:0"
[D] unknown:0 - "SUMMARY:M"
[D] unknown:0 - "TRANSP:OPAQUE"
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "END:VEVENT"
[D] unknown:0 - "END:VCALENDAR"
[D] unknown:0 - "</cal:calendar-data>"
[D] unknown:0 - "   </d:prop>"
[D] unknown:0 - "   <d:status>HTTP/1.1 200 OK</d:status>"
[D] unknown:0 - "  </d:propstat>"
[D] unknown:0 - " </d:response>"
[D] unknown:0 - "</d:multistatus>"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - iCal data contains 3 VEVENT instances
[D] unknown:0 - parsed 3 events from the iCal data
[D] unknown:0 - iCal data contains 1 VEVENT instances
[D] unknown:0 - iCal data contains 2 VEVENT instances
[D] unknown:0 - parsed 2 events from the iCal data
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding exdate: "2018-08-08T16:00:00+02:00"
[D] unknown:0 - Discarding exdate: "2018-05-30T16:00:00+02:00"
[D] unknown:0 - comparing: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) to: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" "2018-08-08T16:00:00+02:00" is real.
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - comparing: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) to: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" "2018-05-30T16:00:00+02:00"
[D] unknown:0 - skipping unrelated local modification: "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) for remote uri: "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"c20cb9d6637996db4de00ad6afb3248a\""
[D] unknown:0 - comparing: "74f41665-8c22-884e-ae4a-665b3217e50b" ( "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" ) to: "74f41665-8c22-884e-ae4a-665b3217e50b" ( "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" ""
[D] unknown:0 - skipping unrelated local modification: "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) for remote uri: "/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics" "2018-10-09T18:00:00+02:00" is real.
[D] unknown:0 -  3 out of 5 local modifications were discarded as spurious (etag/uri update only)
[D] unknown:0 - Report request finished: received: 3 iCal blobs containing a total of 3 incidences of which 0 incidences were remote additions/modifications
[D] unknown:0 - upsyncing local changes: A/M/R: 0 / 2 / 0
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding exdate: "2018-08-08T16:00:00+02:00"
[D] unknown:0 - Discarding exdate: "2018-05-30T16:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 0 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - "Content-Length : 2640"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"
[D] unknown:0 - "URL = https://user:pass@url.org/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - "Request : PUT"
[D] unknown:0 - "BEGIN:VCALENDAR "
[D] unknown:0 - "PRODID:-//K Desktop Environment//NONSGML libkcal 4.3//EN "
[D] unknown:0 - "VERSION:2.0 "
[D] unknown:0 - "X-KDE-ICAL-IMPLEMENTATION-VERSION:1.0 "
[D] unknown:0 - "BEGIN:VTIMEZONE "
[D] unknown:0 - "TZID:Europe/Berlin "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19810329T020000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19160501T220000 "
[D] unknown:0 - "RDATE:19160501T220000 "
[D] unknown:0 - "RDATE:19170416T010000 "
[D] unknown:0 - "RDATE:19180415T010000 "
[D] unknown:0 - "RDATE:19400401T010000 "
[D] unknown:0 - "RDATE:19430329T010000 "
[D] unknown:0 - "RDATE:19440403T010000 "
[D] unknown:0 - "RDATE:19450402T010000 "
[D] unknown:0 - "RDATE:19460414T010000 "
[D] unknown:0 - "RDATE:19470407T020000 "
[D] unknown:0 - "RDATE:19480418T010000 "
[D] unknown:0 - "RDATE:19490410T010000 "
[D] unknown:0 - "RDATE:19800406T020000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19800928T030000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;COUNT=16;BYDAY=-1SU;BYMONTH=9 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19961027T030000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19161001T230000 "
[D] unknown:0 - "RDATE:19161001T230000 "
[D] unknown:0 - "RDATE:19170917T020000 "
[D] unknown:0 - "RDATE:19180916T020000 "
[D] unknown:0 - "RDATE:19421102T020000 "
[D] unknown:0 - "RDATE:19431004T020000 "
[D] unknown:0 - "RDATE:19441002T020000 "
[D] unknown:0 - "RDATE:19451118T020000 "
[D] unknown:0 - "RDATE:19461007T020000 "
[D] unknown:0 - "RDATE:19471005T020000 "
[D] unknown:0 - "RDATE:19481003T020000 "
[D] unknown:0 - "RDATE:19491002T020000 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEMT "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0300 "
[D] unknown:0 - "DTSTART:19450525T000000 "
[D] unknown:0 - "RDATE:19450525T000000 "
[D] unknown:0 - "RDATE:19470511T020000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0300 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19450925T000000 "
[D] unknown:0 - "RDATE:19450925T000000 "
[D] unknown:0 - "RDATE:19470630T000000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "END:VTIMEZONE "
[D] unknown:0 - "BEGIN:VEVENT "
[D] unknown:0 - "DTSTAMP:20181115T190544Z "
[D] unknown:0 - "CREATED:20180925T092841Z "
[D] unknown:0 - "UID:44491fe3-d98b-c245-836c-0b297371026c "
[D] unknown:0 - "LAST-MODIFIED:20181115T190544Z "
[D] unknown:0 - "SUMMARY:E"
[D] unknown:0 - "RECURRENCE-ID;TZID=Europe/Berlin:20180530T160000 "
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20180530T170000 "
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20180530T180000 "
[D] unknown:0 - "TRANSP:OPAQUE "
[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "BEGIN:VEVENT "
[D] unknown:0 - "DTSTAMP:20181115T190544Z "
[D] unknown:0 - "CREATED:20180925T092841Z "
[D] unknown:0 - "UID:44491fe3-d98b-c245-836c-0b297371026c "
[D] unknown:0 - "LAST-MODIFIED:20181115T190544Z "
[D] unknown:0 - "SUMMARY:A"
[D] unknown:0 - "RECURRENCE-ID;TZID=Europe/Berlin:20180808T160000 "
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20180808T140000 "
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20180808T170000 "
[D] unknown:0 - "TRANSP:OPAQUE "
[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "BEGIN:VEVENT "
[D] unknown:0 - "DTSTAMP:20181115T100240Z "
[D] unknown:0 - "CREATED:20180925T092841Z "
[D] unknown:0 - "UID:44491fe3-d98b-c245-836c-0b297371026c "
[D] unknown:0 - "LAST-MODIFIED:20181115T100240Z "
[D] unknown:0 - "SUMMARY:A"
[D] unknown:0 - "RRULE:FREQ=WEEKLY "
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20170719T160000 "
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20170719T190000 "
[D] unknown:0 - "TRANSP:OPAQUE "
[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Discarding exdate: "2018-10-09T18:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 1 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - "Content-Length : 2467"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"
[D] unknown:0 - "URL = https://user:pass@url.org/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - "Request : PUT"
[D] unknown:0 - "BEGIN:VCALENDAR "
[D] unknown:0 - "PRODID:-//K Desktop Environment//NONSGML libkcal 4.3//EN "
[D] unknown:0 - "VERSION:2.0 "
[D] unknown:0 - "X-KDE-ICAL-IMPLEMENTATION-VERSION:1.0 "
[D] unknown:0 - "BEGIN:VTIMEZONE "
[D] unknown:0 - "TZID:Europe/Berlin "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19810329T020000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19160501T220000 "
[D] unknown:0 - "RDATE:19160501T220000 "
[D] unknown:0 - "RDATE:19170416T010000 "
[D] unknown:0 - "RDATE:19180415T010000 "
[D] unknown:0 - "RDATE:19400401T010000 "
[D] unknown:0 - "RDATE:19430329T010000 "
[D] unknown:0 - "RDATE:19440403T010000 "
[D] unknown:0 - "RDATE:19450402T010000 "
[D] unknown:0 - "RDATE:19460414T010000 "
[D] unknown:0 - "RDATE:19470407T020000 "
[D] unknown:0 - "RDATE:19480418T010000 "
[D] unknown:0 - "RDATE:19490410T010000 "
[D] unknown:0 - "RDATE:19800406T020000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19800928T030000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;COUNT=16;BYDAY=-1SU;BYMONTH=9 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19961027T030000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:STANDARD "
[D] unknown:0 - "TZNAME:CET "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0100 "
[D] unknown:0 - "DTSTART:19161001T230000 "
[D] unknown:0 - "RDATE:19161001T230000 "
[D] unknown:0 - "RDATE:19170917T020000 "
[D] unknown:0 - "RDATE:19180916T020000 "
[D] unknown:0 - "RDATE:19421102T020000 "
[D] unknown:0 - "RDATE:19431004T020000 "
[D] unknown:0 - "RDATE:19441002T020000 "
[D] unknown:0 - "RDATE:19451118T020000 "
[D] unknown:0 - "RDATE:19461007T020000 "
[D] unknown:0 - "RDATE:19471005T020000 "
[D] unknown:0 - "RDATE:19481003T020000 "
[D] unknown:0 - "RDATE:19491002T020000 "
[D] unknown:0 - "END:STANDARD "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEMT "
[D] unknown:0 - "TZOFFSETFROM:+0200 "
[D] unknown:0 - "TZOFFSETTO:+0300 "
[D] unknown:0 - "DTSTART:19450525T000000 "
[D] unknown:0 - "RDATE:19450525T000000 "
[D] unknown:0 - "RDATE:19470511T020000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0300 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19450925T000000 "
[D] unknown:0 - "RDATE:19450925T000000 "
[D] unknown:0 - "RDATE:19470630T000000 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "END:VTIMEZONE "
[D] unknown:0 - "BEGIN:VEVENT "
[D] unknown:0 - "DTSTAMP:20181115T190544Z "
[D] unknown:0 - "CREATED:20181115T100240Z "
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55 "
[D] unknown:0 - "LAST-MODIFIED:20181115T190544Z "
[D] unknown:0 - "SUMMARY:M"
[D] unknown:0 - "RECURRENCE-ID;TZID=Europe/Berlin:20181009T180000 "
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20181009T180000 "
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20181009T220000 "
[D] unknown:0 - "TRANSP:OPAQUE "
[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "BEGIN:VEVENT "
[D] unknown:0 - "DTSTAMP:20181115T100240Z "
[D] unknown:0 - "CREATED:20181115T100239Z "
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55 "
[D] unknown:0 - "LAST-MODIFIED:20181115T100240Z "
[D] unknown:0 - "SUMMARY:K "
[D] unknown:0 - "RRULE:FREQ=WEEKLY "
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171024T180000 "
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171107T180000 "
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180710T180000 "
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180717T180000 "
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20170704T180000 "
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20170704T220000 "
[D] unknown:0 - "TRANSP:OPAQUE "
[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "

Owncloud read only calendars don't update

Hi all,

is it possible that syncing shared calendars stopped working in on of the last releases? I just noticed that the calendar that was shared with me only has old information in it. When I manually sync I see that top bar flashing but the shared calendar is not updated. I had this issue before and added a separate account for the shared calendar and set syncing to "only to device". That fixed the issue prior SFOS 3. Any ideas how I could debug this or what I should do?

[Edit] Thanks to naytsyrhc hint I got a log now. I see quite a view ics files being transferred and checked, status always OK, and than at the end:

[D] unknown:0 - PUT request finished: QNetworkReply::NetworkError(ContentNotFoundError)
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: 404"
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "\tServer : nginx"
[D] unknown:0 - "\tDate : Wed, 14 Nov 2018 19:11:13 GMT"
[D] unknown:0 - "\tContent-Type : application/xml; charset=utf-8"
[D] unknown:0 - "\tTransfer-Encoding : chunked"
[D] unknown:0 - "\tConnection : keep-alive"
[D] unknown:0 - "\tVary : Accept-Encoding"
[D] unknown:0 - "\tExpires : Thu, 19 Nov 1981 08:52:00 GMT"
[D] unknown:0 - "\tCache-Control : no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
[D] unknown:0 - "\tPragma : no-cache"
[D] unknown:0 - "\tX-XSS-Protection : 1; mode=block"
[D] unknown:0 - "\tX-Content-Type-Options : nosniff"
[D] unknown:0 - "\tX-Frame-Options : Sameorigin"
[D] unknown:0 - "\tX-Robots-Tag : none"
[D] unknown:0 - "\tX-Download-Options : noopen"
[D] unknown:0 - "\tX-Permitted-Cross-Domain-Policies : none"
[D] unknown:0 - "\tContent-Security-Policy : default-src 'none';"
[D] unknown:0 - "\tContent-Encoding : gzip"
[D] unknown:0 - "PUT response data:<?xml version=\"1.0\" encoding=\"utf-8\"?>"
[D] unknown:0 - "<d:error xmlns:d=\"DAV:\" xmlns:s=\"http://sabredav.org/ns\">"
[D] unknown:0 - "  <s:exception>Sabre\\DAV\\Exception\\NotFound</s:exception>"
[D] unknown:0 - "  <s:message>Node with name '44491fe3-d98b-c245-836c-0b297371026c.ics' could not be found</s:message>"
[D] unknown:0 - "</d:error>"
[D] unknown:0 - "---------------------------------------------------------------------"
[W] unknown:0 - The "PUT" operation failed with error: QNetworkReply::NetworkError(ContentNotFoundError) : 401
[W] unknown:0 - "PUT" request failed. 401 "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - Aborting sync, "PUT" failed "Network request failed with QNetworkReply::NetworkError: 203" for notebook "/remote.php/dav/calendars/A/personal_shared_by_B/" of account: "18"
[D] unknown:0 - Notebook sync finished. Total agents: 1
[W] unknown:0 - Aborting! Notebook synchronisation failed: 401 : "Network request failed with QNetworkReply::NetworkError: 203"
[W] unknown:0 - CalDAV sync failed: 401 "Network request failed with QNetworkReply::NetworkError: 203"
[D] unknown:0 - Session finished: "caldav-sync-18" , status: 3
[D] unknown:0 - aStatus 3

[edit] For testing I got write permission on the calendar. After getting that the update worked. So I think this is really a bug. The update process should not abort if it cannot write to the calendar or check if it is a read only calendar.

[edit] As requested here are some more lines from the log file. I found two instances were the phone found some exceptions that need to be uploaded. This is wired since I did not make any changes to the shared calendar and I am sure that it was up to date.

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Discarding exdate: "2018-10-09T18:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 1 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - "Content-Length : 2467"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"

And the lines right before the error message:

[D] unknown:0 - "END:VEVENT "
[D] unknown:0 - "END:VCALENDAR "
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Already handled local modification 0 via series update
[D] unknown:0 - Already handled local modification 1 via series update
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "PUT response status code: "
[D] unknown:0 - "PUT response headers:"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - Ignoring SSL error response

[edit]

I tried get additional information as requested below but I am not a programmer or do have programming skills so I hope that helps. If not please give me an in detailed step by step instruction.

The event in question is a serial event. The start dates is odd it is 1996, which is for sure not the date it was created.

[D] unknown:0 - "</cal:calendar-data>"
[D] unknown:0 - "   </d:prop>"
[D] unknown:0 - "   <d:status>HTTP/1.1 200 OK</d:status>"
[D] unknown:0 - "  </d:propstat>"
[D] unknown:0 - " </d:response>"
[D] unknown:0 - " <d:response>"
[D] unknown:0 - "  <d:href>/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics</d:href>"
[D] unknown:0 - "  <d:propstat>"
[D] unknown:0 - "   <d:prop>"
[D] unknown:0 - "    <d:getetag>&quot;f73d4f9bed03ef25f447a0310445f5e9&quot;</d:getetag>"
[D] unknown:0 - "    <cal:calendar-data>BEGIN:VCALENDAR"
[D] unknown:0 - "CALSCALE:GREGORIAN"
[D] unknown:0 - "PRODID:-//Apple Inc.//iOS 10.3.3//EN"
[D] unknown:0 - "VERSION:2.0"
[D] unknown:0 - "BEGIN:VTIMEZONE"
[D] unknown:0 - "TZID:Europe/Berlin"
[D] unknown:0 - "BEGIN:DAYLIGHT"
[D] unknown:0 - "DTSTART:19810329T020000"
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU"
[D] unknown:0 - "TZNAME:MESZ"
[D] unknown:0 - "TZOFFSETFROM:+0100"
[D] unknown:0 - "TZOFFSETTO:+0200"
[D] unknown:0 - "END:DAYLIGHT"
[D] unknown:0 - "BEGIN:STANDARD"
[D] unknown:0 - "DTSTART:19961027T030000"
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU"
[D] unknown:0 - "TZNAME:MEZ"
[D] unknown:0 - "TZOFFSETFROM:+0200"
[D] unknown:0 - "TZOFFSETTO:+0100"
[D] unknown:0 - "END:STANDARD"
[D] unknown:0 - "END:VTIMEZONE"
[D] unknown:0 - "BEGIN:VEVENT"
[D] unknown:0 - "CREATED:20170520T091156Z"
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20170704T220000"
[D] unknown:0 - "DTSTAMP:20181004T070017Z"
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20170704T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171024T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20171107T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180710T180000"
[D] unknown:0 - "EXDATE;TZID=Europe/Berlin:20180717T180000"
[D] unknown:0 - "LAST-MODIFIED:20180703T205812Z"
[D] unknown:0 - "RRULE:FREQ=WEEKLY"
[D] unknown:0 - "SEQUENCE:0"
[D] unknown:0 - "SUMMARY:K"
[D] unknown:0 - "TRANSP:OPAQUE"
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "END:VEVENT"
[D] unknown:0 - "BEGIN:VEVENT"
[D] unknown:0 - "CREATED:20181004T070013Z"
[D] unknown:0 - "DTEND;TZID=Europe/Berlin:20181009T220000"
[D] unknown:0 - "DTSTAMP:20181004T070017Z"
[D] unknown:0 - "DTSTART;TZID=Europe/Berlin:20181009T180000"
[D] unknown:0 - "LAST-MODIFIED:20181004T070013Z"
[D] unknown:0 - "RECURRENCE-ID;TZID=Europe/Berlin:20181009T180000"
[D] unknown:0 - "SEQUENCE:0"
[D] unknown:0 - "SUMMARY:M"
[D] unknown:0 - "TRANSP:OPAQUE"
[D] unknown:0 - "UID:E31C24C4-6539-44DC-8F8C-01A91E3DFD55"
[D] unknown:0 - "END:VEVENT"
[D] unknown:0 - "END:VCALENDAR"
[D] unknown:0 - "</cal:calendar-data>"
[D] unknown:0 - "   </d:prop>"
[D] unknown:0 - "   <d:status>HTTP/1.1 200 OK</d:status>"
[D] unknown:0 - "  </d:propstat>"
[D] unknown:0 - " </d:response>"
[D] unknown:0 - "</d:multistatus>"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - iCal data contains 3 VEVENT instances
[D] unknown:0 - parsed 3 events from the iCal data
[D] unknown:0 - iCal data contains 1 VEVENT instances
[D] unknown:0 - iCal data contains 2 VEVENT instances
[D] unknown:0 - parsed 2 events from the iCal data
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding exdate: "2018-08-08T16:00:00+02:00"
[D] unknown:0 - Discarding exdate: "2018-05-30T16:00:00+02:00"
[D] unknown:0 - comparing: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) to: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" "2018-08-08T16:00:00+02:00" is real.
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - comparing: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) to: "44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" "2018-05-30T16:00:00+02:00"
[D] unknown:0 - skipping unrelated local modification: "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) for remote uri: "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"c20cb9d6637996db4de00ad6afb3248a\""
[D] unknown:0 - comparing: "74f41665-8c22-884e-ae4a-665b3217e50b" ( "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" ) to: "74f41665-8c22-884e-ae4a-665b3217e50b" ( "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" )
[D] unknown:0 - discarding spurious local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/74f41665-8c22-884e-ae4a-665b3217e50b.ics" ""
[D] unknown:0 - skipping unrelated local modification: "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c" ( "/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics" ) for remote uri: "/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"f73d4f9bed03ef25f447a0310445f5e9\""
[D] unknown:0 - local modification to: "/remote.php/dav/calendars/A/personal_shared_by_B/E31C24C4-6539-44DC-8F8C-01A91E3DFD55.ics" "2018-10-09T18:00:00+02:00" is real.
[D] unknown:0 -  3 out of 5 local modifications were discarded as spurious (etag/uri update only)
[D] unknown:0 - Report request finished: received: 3 iCal blobs containing a total of 3 incidences of which 0 incidences were remote additions/modifications
[D] unknown:0 - upsyncing local changes: A/M/R: 0 / 2 / 0
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding exdate: "2018-08-08T16:00:00+02:00"
[D] unknown:0 - Discarding exdate: "2018-05-30T16:00:00+02:00"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:uri:/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - Discarding buteo-prefixed comment: "buteo:caldav:etag:\"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - Uploading exception modification via series update for local modification: 0 : "NBUID:59992010-5346-40c6-b914-6f2d05a1a073:44491fe3-d98b-c245-836c-0b297371026c"
[D] unknown:0 - "---------------------------------------------------------------------"
[D] unknown:0 - "If-Match : \"750ac66745dcd765f79673f1b5cb5911\""
[D] unknown:0 - "Content-Length : 2640"
[D] unknown:0 - "Content-Type : text/calendar; charset=utf-8"
[D] unknown:0 - "URL = https://user:pass@url.org/remote.php/dav/calendars/A/personal_shared_by_B/44491fe3-d98b-c245-836c-0b297371026c.ics"
[D] unknown:0 - "Request : PUT"
[D] unknown:0 - "BEGIN:VCALENDAR "
[D] unknown:0 - "PRODID:-//K Desktop Environment//NONSGML libkcal 4.3//EN "
[D] unknown:0 - "VERSION:2.0 "
[D] unknown:0 - "X-KDE-ICAL-IMPLEMENTATION-VERSION:1.0 "
[D] unknown:0 - "BEGIN:VTIMEZONE "
[D] unknown:0 - "TZID:Europe/Berlin "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19810329T020000 "
[D] unknown:0 - "RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 "
[D] unknown:0 - "END:DAYLIGHT "
[D] unknown:0 - "BEGIN:DAYLIGHT "
[D] unknown:0 - "TZNAME:CEST "
[D] unknown:0 - "TZOFFSETFROM:+0100 "
[D] unknown:0 - "TZOFFSETTO:+0200 "
[D] unknown:0 - "DTSTART:19160501T220000 "
[D] unknown:0 - "RDATE:19160501T220000 "
[D] unknown:0 - "RDATE:19170416T010000 "
[D] unknown:0 - "RDATE:19180415T010000 "
[D] unknown:0 - "RDATE:19400401T010000 "
[D] unknown:0 - "RDATE:19430329T010000 "
[D] unknown:0 - "RDATE:19440403T010000 "
[D] unknown:0 - "RDATE:19450402T010000 "
[D] unknown:0 - "RDATE:19460414T010000 "
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