Webcenter Spaces Stuck Threads in MapCache (Doc ID 1557850.1)

Last updated on DECEMBER 15, 2016

Applies to:

Oracle WebCenter Portal - Version 11.1.1.6.0 to 11.1.1.6.5 [Release 11g]
Information in this document applies to any platform.

Symptoms

Webcenter Spaces requests appear to be hanging and showing stuck threads in the Weblogic log files.

Thread Dumps show stuck threads like this:

Thread-422 "[STUCK] ExecuteThread: '25' for queue: 'weblogic.kernel.Default (self-tuning)'" {
  java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
  oracle.wcps.cache.internal.MapCache.prune(MapCache.java:361)
  oracle.wcps.cache.internal.MapCache.put(MapCache.java:287)
  oracle.webcenter.content.integration.spi.ucm.UCMCacheHelper.cacheNode(UCMCacheHelper.java:233)
  oracle.webcenter.content.integration.spi.ucm.factory.NodeFactory.createNode(NodeFactory.java:439)
  oracle.webcenter.content.integration.spi.ucm.factory.NodeFactory.createNode(NodeFactory.java:60)
  oracle.webcenter.content.integration.spi.ucm.factory.NodeFactory.createNode(NodeFactory.java:40)
  oracle.webcenter.content.integration.spi.ucm.NodeOps.convertFolderChildrenToNodes(NodeOps.java:762)
  oracle.webcent

 

Also, the logs show exceptions like these:


2013 8:19:57 AM CET> <
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at oracle.webcenter.webcenterapp.internal.view.shell.WebCenterShellMenuModel._init(WebCenterShellMenuModel.java:769)
at oracle.webcenter.webcenterapp.internal.view.shell.WebCenterShellMenuModel.(WebCenterShellMenuModel.java:109)
at oracle.webcenter.webcenterapp.internal.view.shell.WebCenterTabManagerImpl.getMenuModel(WebCenterTabManagerImpl.java:1511)
at oracle.webcenter.webcenterapp.view.shell.WebCenterShellManager.getShellMenuModel(WebCenterShellManager.java:360)
at oracle.webce

 

Cause

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