[ https://issues.apache.org/jira/browse/HDFS-1496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12931589#action_12931589 ]

Hairong Kuang commented on HDFS-1496:

This turns out to be a bug in storage directory restoration. Image validation exposes the error.

Currently NN uses rollFSEdits to trigger storage directory recovery. The recovery may trigger a saving of the namespace to the newly restored directory which as a result changes in memory image digest. However later on image & edits were fetched from an old storage directory, thus causing the checksum mismatch.

The problem with this storage restoration scheme is that it makes the on-disk state of all storage directories inconsistent.
TestStorageRestore is failing after HDFS-903 fix

Key: HDFS-1496
URL: https://issues.apache.org/jira/browse/HDFS-1496
Project: Hadoop HDFS
Issue Type: Bug
Components: test
Reporter: Konstantin Boudnik
Assignee: Hairong Kuang

TestStorageRestore seems to be failing after HDFS-903 commit. Running git bisect confirms it.
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postedNov 12, '10 at 7:40a
activeNov 24, '11 at 1:05a



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