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https://issues.apache.org/jira/browse/HDFS-2084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052248#comment-13052248
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Konstantin Shvachko commented on HDFS-2084:
-------------------------------------------
Looks like the checkpoint contains a record which tries to set time on a
non-existing file. This should not happen. So the question is how did it
happen? If it's a bug we should fix the cause. I don't see how, but if it's a
legal scenario, then we can suppress NPE as you suggest.
> Sometimes backup node/secondary name node stops with exception
> --------------------------------------------------------------
>
> Key: HDFS-2084
> URL: https://issues.apache.org/jira/browse/HDFS-2084
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.21.0
> Environment: FreeBSD
> Reporter: Vitalii Tymchyshyn
> Attachments: patch.diff
>
>
> 2011-06-17 11:43:23,096 ERROR
> org.apache.hadoop.hdfs.server.namenode.Checkpointer: Throwable Exception in
> doCheckpoint:
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedSetTimes(FSDirectory.java:1765)
> at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedSetTimes(FSDirectory.java:1753)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadEditRecords(FSEditLog.java:708)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:411)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:378)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:1209)
> at
> org.apache.hadoop.hdfs.server.namenode.BackupStorage.loadCheckpoint(BackupStorage.java:158)
> at
> org.apache.hadoop.hdfs.server.namenode.Checkpointer.doCheckpoint(Checkpointer.java:243)
> at
> org.apache.hadoop.hdfs.server.namenode.Checkpointer.run(Checkpointer.java:141)
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