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https://issues.apache.org/jira/browse/HADOOP-15684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Íñigo Goiri reassigned HADOOP-15684:
------------------------------------
Assignee: Rong Tang
> triggerActiveLogRoll stuck on dead name node, when ConnectTimeoutException
> happens.
> ------------------------------------------------------------------------------------
>
> Key: HADOOP-15684
> URL: https://issues.apache.org/jira/browse/HADOOP-15684
> Project: Hadoop Common
> Issue Type: Bug
> Components: ha
> Affects Versions: 3.0.0-alpha1
> Reporter: Rong Tang
> Assignee: Rong Tang
> Priority: Critical
> Attachments:
> 0001-RollEditLog-try-next-NN-when-exception-happens.patch,
> hadoop--rollingUpgrade-SourceMachine001.log
>
>
> When name node call triggerActiveLogRoll, and the cachedActiveProxy is a dead
> name node, it will throws a ConnectTimeoutException, expected behavior is to
> try next NN, but current logic doesn't do so, instead, it keeps trying the
> dead, mistakenly take it as active.
>
> 2018-08-17 10:02:12,001 WARN [Edit log tailer]
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer: Unable to trigger a
> roll of the active NN
> org.apache.hadoop.net.ConnectTimeoutException: Call From
> SourceMachine001/SourceIP to001 TargetMachine001.ap.gbl:8020 failed on socket
> timeout exception: org.apache.hadoop.net.ConnectTimeoutException: 20000
> millis timeout
> org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$2.doWork(EditLogTailer.java:298)
>
> C:\Users\rotang>ping TargetMachine001
> Pinging TargetMachine001[TargetIP001] with 32 bytes of data:
> Request timed out.
> Request timed out.
> Request timed out.
> Request timed out.
> Attachment is a log file saying how it repeatedly retries a dead name node,
> and a fix patch.
> I replaced the actual machine name/ip as SourceMachine001/SourceIP001 and
> TargetMachine001/TargetIP001.
>
> How to Repro:
> In a good running NNs, take down the active NN (don't let it come back during
> test), and then the stand by NNs will keep trying dead (old active) NN,
> because it is the cached one.
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