Showing results for 
Search instead for 
Did you mean: 
Sign up Log in

Earn badges and make progress

You're on your way to the next level! Join the Kudos program to earn points and save your progress.

Deleted user Avatar
Deleted user

Level 1: Seed

25 / 150 points

Next: Root


1 badge earned


Participate in fun challenges

Challenges come and go, but your rewards stay with you. Do more to earn more!


Gift kudos to your peers

What goes around comes around! Share the love by gifting kudos to your peers.


Rise up in the ranks

Keep earning points to reach the top of the leaderboard. It resets every quarter so you always have a chance!


Come for the products,
stay for the community

The Atlassian Community can help you and your team get more value out of Atlassian products and practices.

Atlassian Community about banner
Community Members
Community Events
Community Groups

Why does SynchronousExternalCache fail to read entry from cache ( unclassified failure)?


This problem is possibly related to :

On startup of Confluence 6.2 on centos, the following message appears:

[confluence.impl.vcache.SynchronousExternalCache] lambda$get$11 Failed to read entry from cache 'com.atlassian.bandana.BandanaPersister': Failed due to UNCLASSIFIED_FAILURE



This message repeats about 50 times, then gives up and Confluence starts up with no problems. However, it wastes a few minutes during startup. 

I turned on log4j debugging for SynchronousExternalCache which revealed the following stacktrace: 

Root cause of failure to read entry from cache 'com.atlassian.bandana.BandanaPersister'
com.atlassian.vcache.ExternalCacheException: Failed due to UNCLASSIFIED_FAILURE

at com.atlassian.vcache.internal.legacy.LecacyUtils.mapException(
at com.atlassian.vcache.internal.legacy.LegacyStableReadExternalCache.mapException(
at com.atlassian.vcache.internal.core.metrics.TimedExternalCache.get(TimedExternalCache:67)
at com.atlassian.confluence.impl.vcache.SynchronousExternalCache.get(
at com.atlassian.confluence.setup.bandana.ConfluenceCachingBandanaPersister.retrieve(
at com.atlassian.confluence.setup.bandana.ConfluenceCachingBandanaPersister.retrieve(
at com.atlassian.bandana.DefaultBandanaManager.getValue(
at com.atlassian.bandana.DefaultBandanaManager.getValue(

at com.atlassian.sal.confluence.pluginsettings.ConfluencePluginSettings.lambda$get$2(



Would appreciate input from the community. 

1 answer

0 votes
Diego Atlassian Team Oct 14, 2019

Hello there, @P !

Looking further down into our reports, I believe that you are right. It seems that your instance is indeed affected by the situation described here:

There is still no workaround or solution for this log spam. For the time being, I would advise you to watch and vote for that report. Voting can help to increase the report visibility and watching it will keep you up to date with everything posted there!

Now, would it be possible for you to give us an estimate of how much time those fifty lines of logging take from your startup time?

To do so, send us the timestamp of the first occurrence of the event in your logs and also the last one that occurs before Confluence startup. Please, take care not to share sensitive information here. Our community is an open space where everyone can see everything posted!

Looking forward to your reply. Let us hear from you!

I'm not the OP but I have another datapoint. I see the same error repeated every 10 seconds. It doesn't stop after 50 instances. I'm doing an initial install of Confluence 7.3 Datacenter with MySQL 5.7 (remote). It's been repeating for about 20 minutes.

Suggest an answer

Log in or Sign up to answer

Atlassian Community Events