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https://issues.apache.org/jira/browse/HDFS-7259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14180013#comment-14180013
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Hudson commented on HDFS-7259:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #1934 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1934/])
HDFS-7259. Unresponseive NFS mount point due to deferred COMMIT response.
Contributed by Brandon Li (brandonli: rev
b6f9d5538cf2b425652687e99503f3d566b2056a)
*
hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/IdUserGroup.java
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/WriteManager.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestWrites.java
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/OpenFileCtx.java
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/WriteCtx.java
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java
*
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/conf/NfsConfigKeys.java
> Unresponseive NFS mount point due to deferred COMMIT response
> -------------------------------------------------------------
>
> Key: HDFS-7259
> URL: https://issues.apache.org/jira/browse/HDFS-7259
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Affects Versions: 2.2.0
> Reporter: Brandon Li
> Assignee: Brandon Li
> Fix For: 2.6.0
>
> Attachments: HDFS-7259.001.patch, HDFS-7259.002.patch
>
>
> Since the gateway can't commit random write, it caches the COMMIT requests in
> a queue and send back response only when the data can be committed or stream
> timeout (failure in the latter case). This could cause problems two patterns:
> (1) file uploading failure
> (2) the mount dir is stuck on the same client, but other NFS clients can
> still access NFS gateway.
> The error pattern (2) is because there are too many COMMIT requests pending,
> so the NFS client can't send any other requests(e.g., for "ls") to NFS
> gateway with its pending requests limit.
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