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https://issues.apache.org/jira/browse/HDFS-7587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14369426#comment-14369426
]
Hudson commented on HDFS-7587:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #128 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/128/])
HDFS-7587. Edit log corruption can happen if append fails with a quota
violation. Contributed by Jing Zhao. (jing9: rev
c7c71cdba50cb7d8282622cd496cc913c80cff54)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestDiskspaceQuotaUpdate.java
> Edit log corruption can happen if append fails with a quota violation
> ---------------------------------------------------------------------
>
> Key: HDFS-7587
> URL: https://issues.apache.org/jira/browse/HDFS-7587
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Kihwal Lee
> Assignee: Jing Zhao
> Priority: Blocker
> Fix For: 2.7.0
>
> Attachments: HDFS-7587.001.patch, HDFS-7587.002.patch,
> HDFS-7587.003.patch, HDFS-7587.patch
>
>
> We have seen a standby namenode crashing due to edit log corruption. It was
> complaining that {{OP_CLOSE}} cannot be applied because the file is not
> under-construction.
> When a client was trying to append to the file, the remaining space quota was
> very small. This caused a failure in {{prepareFileForWrite()}}, but after the
> inode was already converted for writing and a lease added. Since these were
> not undone when the quota violation was detected, the file was left in
> under-construction with an active lease without edit logging {{OP_ADD}}.
> A subsequent {{append()}} eventually caused a lease recovery after the soft
> limit period. This resulted in {{commitBlockSynchronization()}}, which closed
> the file with {{OP_CLOSE}} being logged. Since there was no corresponding
> {{OP_ADD}}, edit replaying could not apply this.
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