[HDFS-2050] Backup name node stops responding

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.21.0
• Component/s: namenode

Environment

FreeBSD

• Assignee: Unassigned
• Reporter: Vitalii Tymchyshyn
• Created: 08/Jun/11 09:24
• Updated: 08/Jun/11 09:24

Description

I've tried to set up backup node on 0.21 and after dome time got:

2011-06-07 20:11:34,820 ERROR org.apache.hadoop.hdfs.server.namenode.Checkpointer: Throwable Exception in doCheckpoint:
java.lang.NullPointerException: Panic: parent does not exist
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1508)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addChild(FSDirectory.java:1522)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addNode(FSDirectory.java:1407)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedAddFile(FSDirectory.java:216)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadEditRecords(FSEditLog.java:526)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:411)
at org.apache.hadoop.hdfs.server.namenode.BackupStorage.convergeJournalSpool(BackupStorage.java:333)
at org.apache.hadoop.hdfs.server.namenode.Checkpointer.doCheckpoint(Checkpointer.java:252)
at org.apache.hadoop.hdfs.server.namenode.Checkpointer.run(Checkpointer.java:141)

2011-06-07 20:11:37,072 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: ReplicationMonitor thread received InterruptedException.java.lang.InterruptedException: sleep interrupted
2011-06-07 20:11:37,073 WARN org.apache.hadoop.hdfs.server.namenode.DecommissionManager: Monitor interrupted: java.lang.InterruptedException: sleep interrupted

The node stopped responding, but did not exit. It seems to work after restart (did not try to restart main NameNode).
I've found this: https://issues.apache.org/jira/browse/HDFS-1904
But comments says it affects only 0.23 trunk, so I think this is either different bug or at least it should be said it can be reproduced on 0.21.