https://issues.apache.org/bugzilla/show_bug.cgi?id=50600
Summary: ConcurrentModificationException removing WAR via
FarmWarDeployer
Product: Tomcat 6
Version: 6.0.29
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Cluster
AssignedTo: dev@tomcat.apache.org
ReportedBy: ma...@apache.org
The following exception was reported via $work
WARNING: Exception processing cluster
org.apache.catalina.ha.tcp.SimpleTcpCluster@68e4e358 background process
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:810)
at java.util.HashMap$EntryIterator.next(HashMap.java:851)
at java.util.HashMap$EntryIterator.next(HashMap.java:849)
at org.apache.catalina.ha.deploy.WarWatcher.check(WarWatcher.java:87)
at
org.apache.catalina.ha.deploy.FarmWarDeployer.backgroundProcess(FarmWarDeployer.java:609)
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.backgroundProcess(SimpleTcpCluster.java:596)
at
org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1302)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Thread.java:636)
The root cause is removing the entry directly from the Map rather than from the
iterator. I have a patch that I'll apply shortly.
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