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  1. Confluence Data Center
  2. CONFSERVER-54924

Long Running Task When Comparing Versions With Large Changes

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Low Low
    • None
    • 6.4.0, 6.6.7, 6.13.4, 6.13.6
    • Content - History

      Steps to reproduce

      1. Create page with large amount of lines. For example, 7000+ lines
      2. Edit the page and replace large amount of texts
      3. Go to Page History and compare the page versions

      Expected Behaviour

      Confluence throws timeout message like "Comparing these versions exceeded the timeout of 10 seconds"

      Actual Behaviour

      Page comparison will keep running and exceed 10 seconds default timeout . No WARN or ERROR thrown in atlassian-confluence.log and Long Running Task thread is reported in catalina.out as shown in example below:

      05-Feb-2018 18:41:44.638 WARNING [ContainerBackgroundProcessor[StandardEngine[Standalone]]] org.apache.catalina.valves.StuckThreadDetectionValve.notifyStuckThreadDetected Thread "http-nio-9642-exec-1" (id=182) has been active for 61,887 milliseconds (since 2/5/18 6:40 PM) to serve the same request for http://localhost:9642/conf642/pages/diffpagesbyversion.action?pageId=2588680&selectedPageVersions=3&selectedPageVersions=2 and may be stuck (configured threshold for this StuckThreadDetectionValve is 60 seconds). There is/are 2 thread(s) in total that are monitored by this Valve and may be stuck.
 java.lang.Throwable
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at com.atlassian.util.concurrent.ConcurrentOperationMapImpl$CallerRunsFuture.get(ConcurrentOperationMapImpl.java:65)
	at com.atlassian.util.concurrent.ConcurrentOperationMapImpl.runOperation(ConcurrentOperationMapImpl.java:51)
	at com.atlassian.confluence.diff.WikiConvertingHtmlDiffer.diff(WikiConvertingHtmlDiffer.java:42)
	at com.atlassian.confluence.pages.actions.AbstractDiffPagesAction.execute(AbstractDiffPagesAction.java:74)
...

        1. confluence_cpu_usage.1517832213.txt
          11 kB
        2. confluence_threads.1517832213.txt
          156 kB

          Form Name

            [CONFSERVER-54924] Long Running Task When Comparing Versions With Large Changes

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              Unassigned Unassigned
              jalbion Janet Albion (Inactive)
              Affected customers:
              1 This affects my team
              Watchers:
              6 Start watching this issue

                Created:
                Updated: