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https://issues.apache.org/jira/browse/ACCUMULO-1846?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Christopher Tubbs resolved ACCUMULO-1846.
-----------------------------------------
Resolution: Fixed
> Spurious ClassNotFoundException
> -------------------------------
>
> Key: ACCUMULO-1846
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1846
> Project: Accumulo
> Issue Type: Bug
> Reporter: Josh Elser
> Assignee: Christopher Tubbs
> Fix For: 1.6.0
>
>
> From the monitor:
> {noformat}
> Failed to load class
> java.lang.ClassNotFoundException:
> org.apache.accumulo.master.recovery.HadoopLogCloser
> at
> org.apache.commons.vfs2.impl.VFSClassLoader.findClass(VFSClassLoader.java:175)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at
> org.apache.accumulo.start.classloader.vfs.AccumuloVFSClassLoader.loadClass(AccumuloVFSClassLoader.java:102)
> at
> org.apache.accumulo.core.conf.AccumuloConfiguration.instantiateClassProperty(AccumuloConfiguration.java:193)
> at
> org.apache.accumulo.master.recovery.RecoveryManager.recoverLogs(RecoveryManager.java:162)
> at
> org.apache.accumulo.master.TabletGroupWatcher.run(TabletGroupWatcher.java:195)
> {noformat}
> From the master.debug.log:
> {noformat}
> 2013-11-01 23:07:26,557 [master.EventCoordinator] INFO : tablet !!R<< was
> loaded on localhost:9997
> 2013-11-01 23:07:26,567 [master.Master] DEBUG: Finished gathering information
> from 1 servers in 0.01 seconds
> 2013-11-01 23:07:26,568 [master.Master] DEBUG: not balancing because there
> are unhosted tablets
> 2013-11-01 23:07:26,636 [recovery.RecoveryManager] DEBUG: Recovering
> hdfs://localhost:8020/accumulo1.6/wal/localhost+9997/224c63ac-a7db-4ba6-be87-a6d1fd7a0921
> to
> hdfs://localhost:8020/accumulo1.6/recovery/224c63ac-a7db-4ba6-be87-a6d1fd7a0921d
> to load class
> at
> org.apache.commons.vfs2.impl.VFSClassLoader.findClass(VFSClassLoader.java:175)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at
> org.apache.accumulo.start.classloader.vfs.AccumuloVFSClassLoader.loadClass(AccumuloVFSClassLoader.java:102)
> at
> org.apache.accumulo.core.conf.AccumuloConfiguration.instantiateClassProperty(AccumuloConfiguration.java:193)
> at
> org.apache.accumulo.master.recovery.RecoveryManager.recoverLogs(RecoveryManager.java:162)
> at
> org.apache.accumulo.master.TabletGroupWatcher.run(TabletGroupWatcher.java:195)
> 2013-11-01 23:07:26,645 [conf.AccumuloConfiguration] INFO : Using
> org.apache.accumulo.server.master.recovery.HadoopLogCloser
> 2013-11-01 23:07:26,645 [recovery.RecoveryManager] INFO : Starting recovery
> of
> hdfs://localhost:8020/accumulo1.6/wal/localhost+9997/224c63ac-a7db-4ba6-be87-a6d1fd7a0921
> (in : 10s) created for hdfs:, tablet !0;~< holds a reference
> 2013-11-01 23:07:26,647 [master.Master] DEBUG: 1 assigned to dead servers:
> [!0<;~@(null,localhost:9997[142010edaa87210],null)]...
> {noformat}
> I think I was seeing this when I intentionally set the tserver's heap very
> small to force it to OOM during log recovery (to verify that WAL entries
> aren't prematurely deleted).
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