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https://issues.apache.org/jira/browse/HDFS-5252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817181#comment-13817181
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Hudson commented on HDFS-5252:
------------------------------
SUCCESS: Integrated in Hadoop-Yarn-trunk #386 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/386/])
HDFS-5252. Stable write is not handled correctly in someplace. Contributed by
Brandon Li (brandonli:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1539740)
*
/hadoop/common/trunk/hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/request/READ3Request.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/Nfs3Utils.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/OpenFileCtx.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/WriteManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestWrites.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> Stable write is not handled correctly in someplace
> --------------------------------------------------
>
> Key: HDFS-5252
> URL: https://issues.apache.org/jira/browse/HDFS-5252
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: nfs
> Reporter: Brandon Li
> Assignee: Brandon Li
> Fix For: 2.2.1
>
> Attachments: HDFS-5252.001.patch, HDFS-5252.002.patch
>
>
> When the client asks for a stable write but the prerequisite writes are not
> transferred to NFS gateway, the stableness can't be honored. NFS gateway has
> to treat the write as unstable write and set the flag to UNSTABLE in the
> write response.
> One bug was found during test with Ubuntu client when copying one 1KB file.
> For small files like 1KB file, Ubuntu client does one stable write (with
> FILE_SYNC flag). However, NFS gateway missed one place
> where(OpenFileCtx#doSingleWrite) it sends response with the flag NOT updated
> to UNSTABLE.
> With this bug, the client thinks the write is on disk and thus doesn't send
> COMMIT anymore. The following test tries to read the data back and of course
> fails to do so since the data was not synced.
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