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Date: Thu, 26 Sep 2013 16:10:04 +0000 (UTC)
From: "Brandon Williams (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12670748.1380209535854.24908.1380211804260@arcas>
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Subject: [jira] [Updated] (CASSANDRA-6103) ConcurrentModificationException
 in TokenMetadata.cloneOnlyTokenMap
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     [ https://issues.apache.org/jira/browse/CASSANDRA-6103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Williams updated CASSANDRA-6103:
----------------------------------------

    Fix Version/s: 1.2.11

Hmm, it looks like endpointToHostIdMap is being mutated, but it's not immediately clear how since the gossiper is blocked here and can't notify anything else, not to mention all the locking in TMD.
                
> ConcurrentModificationException in TokenMetadata.cloneOnlyTokenMap
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-6103
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6103
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Mike Schrag
>             Fix For: 1.2.11
>
>
> This isn't reproducible for me, but it happened to one of the servers in our cluster while starting up. It went away on a restart, but I figured it was worth filing anyway:
> ERROR [main] 2013-09-26 08:04:02,478 CassandraDaemon.java (line 464) Exception encountered during startup
> java.util.ConcurrentModificationException
>         at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:834)
>         at java.util.HashMap$EntryIterator.next(HashMap.java:832)
>         at com.google.common.collect.AbstractBiMap$EntrySet$1.next(AbstractBiMap.java:294)
>         at com.google.common.collect.AbstractBiMap$EntrySet$1.next(AbstractBiMap.java:286)
>         at com.google.common.collect.AbstractBiMap.putAll(AbstractBiMap.java:160)
>         at com.google.common.collect.HashBiMap.putAll(HashBiMap.java:42)
>         at com.google.common.collect.HashBiMap.create(HashBiMap.java:72)
>         at org.apache.cassandra.locator.TokenMetadata.cloneOnlyTokenMap(TokenMetadata.java:561)
>         at org.apache.cassandra.locator.AbstractReplicationStrategy.getAddressRanges(AbstractReplicationStrategy.java:192)
>         at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:1711)
>         at org.apache.cassandra.service.StorageService.calculatePendingRanges(StorageService.java:1692)
>         at org.apache.cassandra.service.StorageService.handleStateNormal(StorageService.java:1461)
>         at org.apache.cassandra.service.StorageService.onChange(StorageService.java:1228)
>         at org.apache.cassandra.gms.Gossiper.doNotifications(Gossiper.java:949)
>         at org.apache.cassandra.gms.Gossiper.addLocalApplicationState(Gossiper.java:1116)
>         at org.apache.cassandra.service.StorageService.setTokens(StorageService.java:214)
>         at org.apache.cassandra.service.StorageService.joinTokenRing(StorageService.java:802)
>         at org.apache.cassandra.service.StorageService.initServer(StorageService.java:554)
>         at org.apache.cassandra.service.StorageService.initServer(StorageService.java:451)

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