[JIRA] [core] (JENKINS-18775) [XStream] ConcurrentModificationException from DefaultConverterLookup

Tue, 16 Jul 2013 07:59:50 -0700

Issue Type: Bug Bug
Assignee: Jesse Glick
Components: core
Created: 16/Jul/13 2:57 PM
Description:

A user reported a hung Jenkins instance displaying an error:

org.jvnet.hudson.reactor.ReactorException: java.lang.Error: java.lang.reflect.InvocationTargetException 
	at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:246) 
	at jenkins.InitReactorRunner.run(InitReactorRunner.java:43) 
	at jenkins.model.Jenkins.executeReactor(Jenkins.java:904) 
	at jenkins.model.Jenkins.<init>(Jenkins.java:804) 
	at hudson.model.Hudson.<init>(Hudson.java:81) 
	at hudson.model.Hudson.<init>(Hudson.java:77) 
	at hudson.WebAppMain$2.run(WebAppMain.java:214) 
Caused by: java.lang.Error: java.lang.reflect.InvocationTargetException 
	at hudson.init.InitializerFinder.invoke(InitializerFinder.java:124) 
	at hudson.init.InitializerFinder$TaskImpl.run(InitializerFinder.java:184) 
	at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259) 
	at jenkins.model.Jenkins$7.runTask(Jenkins.java:893) 
	at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187) 
	at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94) 
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
	at java.lang.Thread.run(Thread.java:722) 
Caused by: java.lang.reflect.InvocationTargetException 
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
	at java.lang.reflect.Method.invoke(Method.java:601) 
	at hudson.init.InitializerFinder.invoke(InitializerFinder.java:120) 
... 8 more 
Caused by: java.util.ConcurrentModificationException 
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115) 
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169) 
	at com.thoughtworks.xstream.core.util.PrioritizedList$PrioritizedItemIterator.next(PrioritizedList.java:91) 
	at com.thoughtworks.xstream.core.DefaultConverterLookup.lookupConverterForType(DefaultConverterLookup.java:55) 
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:56)


Seems that DefaultConverterLookup is failing to synchronize access to its converters field; probably another thread was calling registerConverter in the middle of this loop.
Environment: 1.516; JDK 7u10; Linux
Project: Jenkins
Labels: threads xstream
Priority: Major Major
Reporter: Jesse Glick
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