Sync failed: NoSuchElementException

[pacien]

Hello,

Occasionally, DAVDroid produces error notifications reporting a failed synchronisation attempt, throwing a “NoSuchElementException”. The stacktrace indicates a problem with the okhttp3 library which is apparently unable to find a “healthy connection”.

Forcing a synchronisation manually afterwards causes no trouble.

I cannot provide steps to reproduce this error, as I couldn’t find how to trigger it on purpose. Nonetheless, here is the debug log: https://paste.gnugen.ch/raw/xZiP

[devvv4ever]

Yes, this is a bug in a lib we use “okhttp”. It is already fixed in their master version and we will incorporate it within our next release.

[pacien]

Ok, thanks!

[rfc2822]

Seems to happen only when the DNS doesn’t return results. Did you try another connection type (mobile/WiFi)?

More details: https://github.com/square/okhttp/issues/3308

[pacien]

@rfc2822 said in Sync failed: NoSuchElementException:

Seems to happen only when the DNS doesn’t return results.
Did you try another connection type (mobile/WiFi)?

I indeed notice DNS lookup failures due to network connectivity issues from time to time. Retrying some seconds later on the same network or a different one indifferently solves the temporary issue.

I will wait for the fix handling such case in the library to be integrated into the application and report if the problem persists after upgrading.

Thanks!

[rfc2822]

Should be fixed with DAVdroid 1.5.2

[pacien]

Hi,
The same kind of error showed up again with the latest version (1.5.2).
Here is the debug log: https://paste.gnugen.ch/raw/nvKB

[rfc2822]

Already open again in okhttp: https://github.com/square/okhttp/issues/3308