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https://issues.apache.org/jira/browse/HDFS-1521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009408#comment-13009408
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Todd Lipcon commented on HDFS-1521:
-----------------------------------
The error is:
2011-03-21 14:07:49,247 ERROR namenode.TestBackupNode
(TestBackupNode.java:testCheckpoint(190)) - Error in TestBackupNode:
java.io.IOException: Expected transaction ID 40 but got 10
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:146)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:96)
at
org.apache.hadoop.hdfs.server.namenode.BackupImage.convergeJournalSpool(BackupImage.java:355)
at
org.apache.hadoop.hdfs.server.namenode.Checkpointer.doCheckpoint(Checkpointer.java:260)
at
org.apache.hadoop.hdfs.server.namenode.BackupNode.doCheckpoint(BackupNode.java:279)
at
org.apache.hadoop.hdfs.server.namenode.TestBackupNode.testCheckpoint(TestBackupNode.java:186)
at
org.apache.hadoop.hdfs.server.namenode.TestBackupNode.testCheckpoint(TestBackupNode.java:106)
> Persist transaction ID on disk between NN restarts
> --------------------------------------------------
>
> Key: HDFS-1521
> URL: https://issues.apache.org/jira/browse/HDFS-1521
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.23.0
>
> Attachments: FSImageFormat.patch, HDFS-1521.diff, HDFS-1521.diff,
> HDFS-1521.diff, HDFS-1521.diff, HDFS-1521.diff, hdfs-1521.3.txt,
> hdfs-1521.4.txt, hdfs-1521.5.txt, hdfs-1521.txt, hdfs-1521.txt, hdfs-1521.txt
>
>
> For HDFS-1073 and other future work, we'd like to have the concept of a
> transaction ID that is persisted on disk with the image/edits. We already
> have this concept in the NameNode but it resets to 0 on restart. We can also
> use this txid to replace the _checkpointTime_ field, I believe.
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