caldav not working for nextcloud personal calendar

zaingeec7o

I have a nextcloud instance running the included calendar app which has been working fine until lately. I can not sync the “Personal” calendar, which is the default calendar created by the app. I can however sync everything else, including newly created calendars with different caldav urls. Contact sync also works fine. davx5 reports a 404 with the following debug information below followed by server logs from the app and nginx. All nextcloud self checks pass and dav redirects are configured correctly (considering other calendars work fine). Has anyone experienced a similar issue? I thought this would be a good place to start but will probably open an issue with nextcloud as well.

I’m running nextcloud version 18.0.1.

--- BEGIN DEBUG INFO ---
SYNCHRONIZATION INFO
Account name: email@myserver.com
Authority: com.android.calendar

HTTP REQUEST:
Request{method=REPORT, url=https://myserver.com/remote.php/dav/calendars/user.name/personal/, tags={}}
<?xml version='1.0' encoding='UTF-8' ?><CAL:calendar-query xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav"><prop><getetag /></prop><CAL:filter><CAL:comp-filter name="VCALENDAR"><CAL:comp-filter name="VEVENT"><CAL:time-range start="20191121T035347Z" /></CAL:comp-filter></CAL:comp-filter></CAL:filter></CAL:calendar-query>

HTTP RESPONSE:
Response{protocol=h2, code=404, message=, url=https://myserver.com/remote.php/dav/calendars/user.name/personal/}
<?xml version="1.0" encoding="utf-8"?>
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
  <s:exception>Sabre\DAV\Exception\NotFound</s:exception>
  <s:message>Calendar object not found</s:message>
</d:error>



REMOTE RESOURCE:
https://myserver.com/remote.php/dav/calendars/user.name/personal/

EXCEPTION:
at.bitfire.dav4jvm.exception.NotFoundException: HTTP 404 
	at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:356)
	at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:338)
	at at.bitfire.dav4jvm.DavResource.processMultiStatus(DavResource.kt:432)
	at at.bitfire.dav4jvm.DavCalendar.calendarQuery(DavCalendar.kt:99)
	at at.bitfire.davdroid.syncadapter.CalendarSyncManager$listAllRemote$2.invoke(CalendarSyncManager.kt:110)
	at at.bitfire.davdroid.syncadapter.CalendarSyncManager$listAllRemote$2.invoke(CalendarSyncManager.kt:44)
	at at.bitfire.davdroid.syncadapter.SyncManager.useRemote(SyncManager.kt:828)
	at at.bitfire.davdroid.syncadapter.SyncManager.useRemoteCollection(SyncManager.kt:849)
	at at.bitfire.davdroid.syncadapter.CalendarSyncManager.listAllRemote(CalendarSyncManager.kt:108)
	at at.bitfire.davdroid.syncadapter.SyncManager$performSync$1$1.invoke(SyncManager.kt:157)
	at at.bitfire.davdroid.syncadapter.SyncManager$performSync$1$1.invoke(SyncManager.kt:57)
	at at.bitfire.davdroid.syncadapter.SyncManager.syncRemote(SyncManager.kt:474)
	at at.bitfire.davdroid.syncadapter.SyncManager$performSync$1.invoke(SyncManager.kt:156)
	at at.bitfire.davdroid.syncadapter.SyncManager$performSync$1.invoke(SyncManager.kt:57)
	at at.bitfire.davdroid.syncadapter.SyncManager.unwrapExceptions(SyncManager.kt:854)
	at at.bitfire.davdroid.syncadapter.SyncManager.performSync(SyncManager.kt:116)
	at at.bitfire.davdroid.syncadapter.CalendarsSyncAdapterService$CalendarsSyncAdapter.sync(CalendarsSyncAdapterService.kt:61)
	at at.bitfire.davdroid.syncadapter.SyncAdapterService$SyncAdapter.onPerformSync(SyncAdapterService.kt:122)
	at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:334)

SOFTWARE INFORMATION
* at.bitfire.davdroid 2.6.3.1-ose (329) from org.fdroid.fdroid.privileged
* org.dmfs.tasks 1.2.4 (78500) from org.fdroid.fdroid.privileged
* com.android.providers.contacts 9 (28)
* com.android.providers.calendar 9 (28)
* com.android.contacts 1.7.31 (10731)
* com.android.calendar 9 (28)

CONNECTIVITY (at the moment)
- [ Transports: CELLULAR Capabilities: MMS&SUPL&IA&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&NOT_CONGESTED&NOT_SUSPENDED Unwanted:  LinkUpBandwidth>=51200Kbps LinkDnBandwidth>=102400Kbps Specifier: <1>]
- [ Transports: WIFI Capabilities: NOT_METERED&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED Unwanted:  LinkUpBandwidth>=1048576Kbps LinkDnBandwidth>=1048576Kbps SignalStrength: -38]

CONFIGURATION
Power saving disabled: yes
Notifications (not blocked):
  [group] sync isBlocked=false
    syncProblems: importance=3
    syncIoErrors: importance=1
    syncWarnings: importance=2
  cert4android: importance=3
  general: importance=3
  debug: importance=4
Permissions:
  READ_CONTACTS: granted
  WRITE_CONTACTS: granted
  READ_CALENDAR: granted
  WRITE_CALENDAR: granted
  READ_TASKS: granted
  WRITE_TASKS: granted
  ACCESS_COARSE_LOCATION: denied
System-wide synchronization: automatically

ACCOUNTS
Account: email@myserver.com
  Address book sync. interval: 240 min
  Calendar     sync. interval: 240 min
  OpenTasks    sync. interval: 240 min
  WiFi only: false
  [CardDAV] Contact group method: GROUP_VCARDS
  [CalDAV] Time range (past days): 90
           Manage calendar colors: true
           Use event colors: false
Address book account: Contacts (email@myserver.com /Q)
  Main account: Account {name=email@myserver.com, type=bitfire.at.davdroid}
  URL: https://myserver.com/remote.php/dav/addressbooks/users/user.name/contacts/
  Sync automatically: true

SQLITE DUMP
android_metadata
	|  locale |
	|  en_US |
----------
room_master_table
	|  id | identity_hash |
	|  42 | $$$$$$$$$id_hash_hash$$$$$$$$ |
----------
service
	|  id | accountName | type | principal |
	|  3 | email@myserver.com | carddav | https://myserver.com/remote.php/dav/principals/users/user.name/ |
	|  4 | email@myserver.com | caldav | https://myserver.com/remote.php/dav/principals/users/user.name/ |
----------
sqlite_sequence
	|  name | seq |
	|  service | 4 |
	|  homeset | 4 |
	|  collection | 11 |
----------
homeset
	|  id | serviceId | url | privBind | displayName |
	|  3 | 4 | https://myserver.com/remote.php/dav/calendars/user.name/ | 1 | <null> |
	|  4 | 3 | https://myserver.com/remote.php/dav/addressbooks/users/user.name/ | 1 | <null> |
----------
collection
	|  id | serviceId | type | url | privWriteContent | privUnbind | forceReadOnly | displayName | description | color | timezone | supportsVEVENT | supportsVTODO | supportsVJOURNAL | source | sync |
	|  6 | 4 | CALENDAR | https://myserver.com/remote.php/dav/calendars/user.name/contact_birthdays/ | 0 | 0 | 0 | Contact birthdays | <null> | -54 | <null> | 1 | 0 | 0 | <null> | 0 |
	|  7 | 4 | CALENDAR | https://myserver.com/remote.php/dav/calendars/user.name/personal/ | 1 | 1 | 0 | Personal | <null> | -9139225 | <null> | 1 | 1 | 0 | <null> | 1 |
	|  8 | 4 | WEBCAL | https://myserver.com/remote.php/dav/calendars/user.name/calendar/ | 1 | 1 | 0 | work_o365 | <null> | -926896 | <null> | 1 | <null> | <null> | https://outlook.office365.com/owa/calendar/<calid>@company.com/<calid>/calendar.ics | 1 |
	|  9 | 3 | ADDRESS_BOOK | https://myserver.com/remote.php/dav/addressbooks/users/user.name/contacts/ | 1 | 1 | 0 | Contacts | <null> | <null> | <null> | <null> | <null> | <null> | <null> | 1 |
	|  10 | 4 | CALENDAR | https://myserver.com/remote.php/dav/calendars/user.name/test/ | 1 | 1 | 0 | test | <null> | -11953502 | <null> | 1 | 0 | 0 | <null> | 0 |
	|  11 | 4 | CALENDAR | https://myserver.com/remote.php/dav/calendars/user.name/testtasks/ | 1 | 1 | 0 | testtasks | <null> | -9525617 | <null> | 1 | 1 | 0 | <null> | 0 |
----------

SYSTEM INFORMATION
Android version: 9 (lineage_klte-userdebug 9 PQ3A.190801.002 eng.root.20200212.101449 dev-keys)
Device: samsung SM-G900F (klte)

--- END DEBUG INFO ---

application and web logs for failed sync:

app_1                    | 172.18.0.5 - user.name 19/Feb/2020:04:04:07 +0000 "REPORT /remote.php" 404 
web_1                    | 172.19.0.1 - user.name [19/Feb/2020:04:04:07 +0000] "REPORT /remote.php/dav/calendars/user.name/personal/ HTTP/1.1" 404 187 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9" "172.19.0.1"  
proxy_1                  | nginx.1    | myserver.com 172.19.0.1 - user.name [19/Feb/2020:04:04:07 +0000] "REPORT /remote.php/dav/calendars/user.name/personal/ HTTP/2.0" 404 176 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9"

application and web logs for a sucessful one:

web_1                    | 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "PROPFIND /remote.php/dav/calendars/user.name/testtasks/ HTTP/1.1" 207 536 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9" "172.19.0.1"
proxy_1                  | nginx.1    | myserver.com 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "PROPFIND /remote.php/dav/calendars/user.name/testtasks/ HTTP/2.0" 207 524 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9"
app_1                    | 172.18.0.5 - user.name 19/Feb/2020:04:09:05 +0000 "PROPFIND /remote.php" 207
app_1                    | 172.18.0.5 - user.name 19/Feb/2020:04:09:05 +0000 "PROPFIND /remote.php" 207
web_1                    | 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "PROPFIND /remote.php/dav/calendars/user.name/calendar/ HTTP/1.1" 207 1123 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9" "172.19.0.1"
proxy_1                  | nginx.1    | myserver.com 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "PROPFIND /remote.php/dav/calendars/user.name/calendar/ HTTP/2.0" 207 1111 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9"
app_1                    | 172.18.0.5 - user.name 19/Feb/2020:04:09:06 +0000 "REPORT /remote.php" 207
proxy_1                  | nginx.1    | myserver.com 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "REPORT /remote.php/dav/calendars/user.name/testtasks/ HTTP/2.0" 207 238 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9"
web_1                    | 172.19.0.1 - user.name [19/Feb/2020:04:09:06 +0000] "REPORT /remote.php/dav/calendars/user.name/testtasks/ HTTP/1.1" 207 249 "-" "DAVx5/2.6.3.1-ose (2020/01/18; dav4jvm; okhttp/3.12.6) Android/9" "172.19.0.1"

rfc2822

Hi,

@zaingeec7o said in caldav not working for nextcloud personal calendar:

I can not sync the “Personal” calendar […] I can however sync everything else, including newly created calendars with different caldav urls.

Sounds like there is a problem with this specific calendar. The error message from Nextcloud says the same:

HTTP REQUEST:
Request{method=REPORT, url=https://myserver.com/remote.php/dav/calendars/user.name/personal/, tags={}}
<?xml version=‘1.0’ encoding=‘UTF-8’ ?><CAL:calendar-query xmlns=“DAV:” xmlns:CAL=“urn:ietf:params:xml:ns:caldav”><prop><getetag /></prop>CAL:filter<CAL:comp-filter name=“VCALENDAR”><CAL:comp-filter name=“VEVENT”><CAL:time-range start=“20191121T035347Z” /></CAL:comp-filter></CAL:comp-filter></CAL:filter></CAL:calendar-query>

HTTP RESPONSE:
Response{protocol=h2, code=404, message=, url=https://myserver.com/remote.php/dav/calendars/user.name/personal/}
<?xml version=“1.0” encoding=“utf-8”?>
<d:error xmlns:d=“DAV:” xmlns:s=“http://sabredav.org/ns”>
<s:exception>Sabre\DAV\Exception\NotFound</s:exception>
<s:message>Calendar object not found</s:message>
</d:error>

This means that when DAVx⁵ asks for events for 20191121T035347Z and newer, Nextcloud returns “404 Calendar object not found”, which sounds as it can’t parse a specific event in this time and then breaks with 404.

So, this seems to be a server problem. There should be more information in the Nextcloud logs.

zaingeec7o

@rfc2822 Thanks for taking a look. 20191121T035347Z is exactly 90 days prior to when the request was made. Davx5 is configured to begin searching for events 90 days prior. I assumed CAL:time-range start=“20191121T035347Z indicated the start point for that range. Is that not the case? Nevermind, I misread your reply. I’ll look for broken events in that range and see what I can find. Thanks for your help.

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