Jira is logging multiple cache flushes in the application logs (Server and Data Center)
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Problem
The following INFO messages can be seen in the atlassian-jira.log regarding specific caches being flushed. Example:
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2021-11-04 15:08:41,001-0300 http-nio-8080-exec-18 INFO [c.a.c.e.c.a.j.i.f.l.column.DefaultColumnLayoutManager.filterColumnLayoutCache] Cache com.atlassian.jira.issue.fields.layout.column.DefaultColumnLayoutManager.filterColumnLayoutCache was flushed
2021-11-04 15:08:41,001-0300 http-nio-8080-exec-18 INFO [c.a.c.e.c.a.j.i.f.screen.CachingFieldScreenStore.allScreensCache] Cache com.atlassian.jira.issue.fields.screen.CachingFieldScreenStore.allScreensCache was flushed
2021-11-04 15:08:41,001-0300 http-nio-8080-exec-18 INFO [c.a.c.e.c.a.j.i.f.screen.CachingFieldScreenStore.fieldScreenCache] Cache com.atlassian.jira.issue.fields.screen.CachingFieldScreenStore.fieldScreenCache was flushedEnvironment
Jira 8.19.0 and later
Cause
This is expected behavior and will not cause any problems or concerns.
Starting with Jira 8.19.0, Jira will be deployed with a new logging level enabled by default, as described in the following feature request: JRASERVER-70298 - Make DEBUG com.atlassian.cache.event as default logging
This is useful when troubleshooting issues with Jira and to determine what caused a specific cache to be flushed. During the Jira startup you will see lots of these messages as it's expected behavior that several Jira caches are populated and flushed for the first time.
How to disable this feature
To disable logging on cache flushes, please follow these steps:
Open the log4j.properties file (located in the Jira application installation directory).
Change the line below from INFO to OFF. Example:
1log4j.logger.com.atlassian.cache.event = OFF, filelogSave the file and restart the node for the changes to take effect.
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