One of three calenders could not be synchronized after the last two updates 3.1 and 3.1.1

Nomad

Hello guys,

after the last updates one of my calendars is not able to be synchronized with my DiskStation. I have no clue why. When I switch back to 3.0 it works fine…

--- BEGIN DEBUG INFO ---
SYNCHRONIZATION INFO
Account name: Kalender2
Authority: org.dmfs.tasks

HTTP REQUEST:
Request{method=REPORT, url=https://diskstation.com:8001/calendar/, headers=[Accept-Encoding:br,gzip]}
<?xml version='1.0' encoding='UTF-8' ?><CAL:calendar-multiget xmlns="DAV:" xmlns:CAL="urn:ietf:params:xml:ns:caldav"><prop><getcontenttype /><getetag /><CAL:calendar-data /></prop></CAL:calendar-multiget>

HTTP RESPONSE:
Response{protocol=http/1.1, code=404, message=Not Found, url=https://diskstation.com:8001/calendar/}



REMOTE RESOURCE:
https://diskstation.com:8001/calendar/

EXCEPTION:
at.bitfire.dav4jvm.exception.NotFoundException: HTTP 404 Not Found
	at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:6)
	at at.bitfire.dav4jvm.DavResource.checkStatus(DavResource.kt:3)
	at at.bitfire.dav4jvm.DavResource.processMultiStatus(DavResource.kt:1)
	at at.bitfire.dav4jvm.DavCalendar.multiget(DavCalendar.kt:23)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager$downloadRemote$1.invoke(TasksSyncManager.kt:2)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager$downloadRemote$1.invoke(TasksSyncManager.kt:1)
	at at.bitfire.davdroid.syncadapter.SyncManager.useRemote(SyncManager.kt:1)
	at at.bitfire.davdroid.syncadapter.SyncManager.useRemoteCollection(SyncManager.kt:1)
	at at.bitfire.davdroid.syncadapter.TasksSyncManager.downloadRemote(TasksSyncManager.kt:2)
	at at.bitfire.davdroid.syncadapter.SyncManager$syncRemote$1$1$1.invokeSuspend(SyncManager.kt:2)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:2)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:18)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:919)

SOFTWARE INFORMATION
* at.bitfire.davdroid 3.1.1-gplay (301010002) from com.android.vending
* org.dmfs.tasks 1.2.3 (77600) from com.android.vending
* com.android.providers.contacts 10 (29) from com.android.vending
* com.android.providers.calendar 10 (29)
* com.google.android.contacts 3.25.3.314396553 (2414146) from com.android.vending
* org.withouthat.acalendarplus 2.3.4 (2003403) from com.android.vending

CONNECTIVITY (at the moment)
- [ Transports: CELLULAR Capabilities: MMS&SUPL&INTERNET&NOT_RESTRICTED&TRUSTED&NOT_VPN&VALIDATED&NOT_ROAMING&FOREGROUND&NOT_CONGESTED&NOT_SUSPENDED LinkDnBandwidth>=25073Kbps Specifier: <1>]

CONFIGURATION
Power saving disabled: yes
Notifications (not blocked):
  [group] sync isBlocked=false
    syncProblems: importance=3
    syncIoErrors: importance=1
    syncWarnings: importance=2
  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

APP SETTINGS
Distrust system certs: false
Override system proxy: false

ACCOUNTS
Account: Kalender3
  Address book sync. interval: —
  Calendar     sync. interval: 240 min
  OpenTasks    sync. interval: 240 min
  WiFi only: false
  getIsSyncable(CalendarContract): 1
  getIsSyncable(OpenTasks): 1
  [CardDAV] Contact group method: GROUP_VCARDS
  [CalDAV] Time range (past days): null
           Default alarm (min before): null
           Manage calendar colors: true
           Use event colors: true
Account: Kontakte_Privat
  Address book sync. interval: 60 min
  Calendar     sync. interval: —
  OpenTasks    sync. interval: —
  WiFi only: false
  getIsSyncable(CalendarContract): 0
  getIsSyncable(OpenTasks): 0
  [CardDAV] Contact group method: GROUP_VCARDS
  [CalDAV] Time range (past days): 90
           Default alarm (min before): null
           Manage calendar colors: true
           Use event colors: false
Account: nomad_Privat
  Address book sync. interval: —
  Calendar     sync. interval: 60 min
  OpenTasks    sync. interval: 240 min
  WiFi only: false
  getIsSyncable(CalendarContract): 1
  getIsSyncable(OpenTasks): 1
  [CardDAV] Contact group method: GROUP_VCARDS
  [CalDAV] Time range (past days): null
           Default alarm (min before): null
           Manage calendar colors: true
           Use event colors: true
Account: Kalender2
  Address book sync. interval: —
  Calendar     sync. interval: 30 min
  OpenTasks    sync. interval: 30 min
  WiFi only: false
  getIsSyncable(CalendarContract): 1
  getIsSyncable(OpenTasks): 1
  [CardDAV] Contact group method: GROUP_VCARDS
  [CalDAV] Time range (past days): 0
           Default alarm (min before): null
           Manage calendar colors: true
           Use event colors: true
Address book account: addressbook (Kontakte_Privat Gw)
  Main account: Account {name=Kontakte_Privat, type=bitfire.at.davdroid}
  URL: diskstation.com:8003/addressbooks/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/addressbook/
  Sync automatically: true

SQLITE DUMP
android_metadata
	|  locale |
	|  de_DE |
----------
room_master_table
	|  id | identity_hash |
	|  42 | a7554d1ebc5ecfe0c7aefe271485d63c |
----------
service
	|  id | accountName | type | principal |
	|  1 | Kalender2 | caldav | <null> |
	|  4 | nomad_Kontakte | carddav | diskstation.com:8003/principals/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/ |
	|  6 | nomad_Kalender | caldav | <null> |
	|  7 | Kalender4 | caldav | <null> |
	|  8 | Kalender3 | caldav | <null> |
	|  9 | Kontakte_Privat | carddav | diskstation.com:8003/principals/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/ |
	|  10 | nomad_Privat | caldav | <null> |
----------
sqlite_sequence
	|  name | seq |
	|  service | 10 |
	|  homeset | 10 |
	|  collection | 10 |
----------
homeset
	|  id | serviceId | url | privBind | displayName |
	|  1 | 1 | https://diskstation.com:8001/calendar/ | 1 | <null> |
	|  4 | 4 | diskstation.com:8003/addressbooks/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/ | 1 | Ich |
	|  6 | 6 | https://diskstation.com:8003/homes/nomad/Privat_nomad/ | 1 | <null> |
	|  7 | 7 | https://diskstation.com:8001/calendar/ | 1 | <null> |
	|  8 | 8 | https://diskstation.com:8003/Download/Kalender3/ | 1 | <null> |
	|  9 | 9 | diskstation.com:8003/addressbooks/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/ | 1 | Ich |
	|  10 | 10 | https://diskstation.com:8003/homes/nomad/Privat_nomad/ | 1 | <null> |
----------
collection
	|  id | serviceId | type | url | privWriteContent | privUnbind | forceReadOnly | displayName | description | color | timezone | supportsVEVENT | supportsVTODO | supportsVJOURNAL | source | sync |
	|  1 | 1 | CALENDAR | https://diskstation.com:8001/calendar/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | 1 | 1 | 1 | <null> | 1 |
	|  2 | 4 | ADDRESS_BOOK | diskstation.com:8003/addressbooks/users/nomad/addressbook/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | <null> | <null> | <null> | <null> | 0 |
	|  3 | 4 | ADDRESS_BOOK | diskstation.com:8003/addressbooks/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/addressbook/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | <null> | <null> | <null> | <null> | 1 |
	|  5 | 6 | CALENDAR | https://diskstation.com:8003/homes/nomad/Privat_nomad/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | 1 | 1 | 1 | <null> | 1 |
	|  6 | 7 | CALENDAR | https://diskstation.com:8001/calendar/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | 1 | 1 | 1 | <null> | 1 |
	|  7 | 8 | CALENDAR | https://diskstation.com:8003/Download/Kalender3/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | 1 | 1 | 1 | <null> | 1 |
	|  8 | 9 | ADDRESS_BOOK | diskstation.com:8003/addressbooks/users/nomad/addressbook/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | <null> | <null> | <null> | <null> | 0 |
	|  9 | 9 | ADDRESS_BOOK | diskstation.com:8003/addressbooks/__uids__/DC281142-47CC-542E-B5FE-14E820A78475/addressbook/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | <null> | <null> | <null> | <null> | 1 |
	|  10 | 10 | CALENDAR | https://diskstation.com:8003/homes/nomad/Privat_nomad/ | 1 | 1 | 0 | <null> | <null> | <null> | <null> | 1 | 1 | 1 | <null> | 1 |
----------

SYSTEM INFORMATION
Android version: 10 (GM1900_14_200519)
Device: OnePlus GM1900 (OnePlus7)

--- END DEBUG INFO ---

I would appreciate some tipp

BR
Nomad

rfc2822

Hi,

Do you use the WebDAV package? Can you maybe provide a test account? We can’t reproduce this with our Synology DSM.

Nomad

The funny thing is, that three other accounts work, even with the new versions. I have already tried to setup this account brand new, but anything changes…and yes I use the webdav server from DS.
The only thing which differs is, that this special account is also used by my family with apple devices…the others not. Did this might lead to an issue?

rfc2822

I don’t know; can absolutely be the case. The problem is that when we can’t reproduce the problem, we can’t take a look. And a server sending 404 (like in your exception info) is normally a server problem and not a client problem. Also, we didn’t change anything between 3.0 and 3.1 that should cause any changes in that sync behavior.

Nomad

Hi, I have tried a lot today:

Created a new calendar --> it works
copied the calendar files from the old one in the new calendar --> doesn’t work
deleted the app with every data from my mobile and recreated everything --> calendar doesn’t work
checked the calendar with outlook --> it works
reinstalled the old version 2.6.5 --> it works

Now I am lost…

rfc2822

If you can reproduce it somehow and maybe even provide a test account, please let us know and/or send an email to play@bitfire.at so that I can give a try. When I can reproduce the problem, I can have a look at it.

Nomad

I gave it another try and connected the calendar of the iphone with xdav and it works.
The next funny thing is: during another test I reset the cache of my android calendar. During this test davx 3.1.1 works for 2h (sync interval 15min), then the error occurred again.
To make sure this was just a chance, I did the test twice again…the error occurred now every time instantly…

I have no idea how to reproduce the error. It only occurs with one of my calendars and with davx 3.1 and 3.1.1, with 2.6.5 it works fine.

BR

Nomad

So today I updated to 3.2. The issue occurred again but when I manually start syncing it works. This issue is then fixed until an iPhone user makes an entry to this calendar. Then the upfront mention behavior occurred again…and this its reproducible.

rfc2822

So after someone uses an iPhone with this calendar, the server returns 404? Is this correct?

Nomad

Yes. Everytime someone is using an iphone and changes something, I got 404 back. After some tries (at least 3) it works and there is no more error until somebody with an iphone is changing something again.

rfc2822

Then this really sounds like it’s not related to DAVx5 and I unfortunately don’t know whats going wrong between iPhone and your server…

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