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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4176) EditLogTailer should call rollEdits with a timeout
Date Thu, 28 Jul 2016 05:37:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15396976#comment-15396976
] 

Hadoop QA commented on HDFS-4176:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  5s{color} | {color:red}
HDFS-4176 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12820581/HDFS-4176.03.patch
|
| JIRA Issue | HDFS-4176 |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/16227/console |
| Powered by | Apache Yetus 0.4.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> EditLogTailer should call rollEdits with a timeout
> --------------------------------------------------
>
>                 Key: HDFS-4176
>                 URL: https://issues.apache.org/jira/browse/HDFS-4176
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, namenode
>    Affects Versions: 2.0.2-alpha, 3.0.0-alpha1
>            Reporter: Todd Lipcon
>            Assignee: Lei (Eddy) Xu
>         Attachments: HDFS-4176.00.patch, HDFS-4176.01.patch, HDFS-4176.02.patch, HDFS-4176.03.patch,
namenode.jstack4
>
>
> When the EditLogTailer thread calls rollEdits() on the active NN via RPC, it currently
does so without a timeout. So, if the active NN has frozen (but not actually crashed), this
call can hang forever. This can then potentially prevent the standby from becoming active.
> This may actually considered a side effect of HADOOP-6762 -- if the RPC were interruptible,
that would also fix the issue.



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