[SOLR-1797] ConcurrentModificationException

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.4, 1.5
• Fix Version/s: 1.4.1, 1.5, 3.1, 4.0-ALPHA
• Component/s: Build

Environment

Centos 5, Tomcat 6

• Assignee: Unassigned
• Reporter: Dan Hertz
• Created: 27/Feb/10 02:49
• Updated: 08/Jul/10 19:55
• Resolved: 21/Mar/10 21:09

Description

SOLR 1.4 (final) and 1.5 nightly work fine on a Windows box, but on our Centos 5 box, we're getting a ConcurrentModificationException when starting Tomcat 6.

Yonik Seeley asked me to start a JIRA bug report, mentioning that, "It looks like resourceLoader.newInstance() is fundamentally not thread safe." (SOLR-USER)

= = = Log Below: = = =

INFO | jvm 1 | 2010/02/24 21:27:04 | SEVERE: java.util.ConcurrentModificationException
INFO | jvm 1 | 2010/02/24 21:27:04 | at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
INFO | jvm 1 | 2010/02/24 21:27:04 | at java.util.AbstractList$Itr.next(AbstractList.java:343)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.core.SolrResourceLoader.inform(SolrResourceLoader.java:507)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.core.SolrCore.<init>(SolrCore.java:606)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.core.CoreContainer.create(CoreContainer.java:429)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.core.CoreContainer.load(CoreContainer.java:285)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:117)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:86)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3800)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardContext.start(StandardContext.java:4450)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:630)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:556)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:491)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardService.start(StandardService.java:516)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
INFO | jvm 1 | 2010/02/24 21:27:04 | at java.lang.reflect.Method.invoke(Method.java:597)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
INFO | jvm 1 | 2010/02/24 21:27:04 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
INFO | jvm 1 | 2010/02/24 21:27:04 | at java.lang.reflect.Method.invoke(Method.java:597)
INFO | jvm 1 | 2010/02/24 21:27:04 | at org.tanukisoftware.wrapper.WrapperStartStopApp.run(WrapperStartStopApp.java:242)
INFO | jvm 1 | 2010/02/24 21:27:04 | at java.lang.Thread.run(Thread.java:619)