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https://issues.apache.org/jira/browse/HDFS-4859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669960#comment-13669960
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Suresh Srinivas commented on HDFS-4859:
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[~cmccabe] Please stop preaching to the choir.
Kihwal has been contributing to hadoop and supporting many large clusters for a
long time and understands the issues more than you give him credit for in these
comments. If he wants to explore making FJM more robust, it is up to him. I
also believe that not everyone may want to use QJM and that is e reason why
these interfaces are plug gable.
> Add timeout in FileJournalManager
> ---------------------------------
>
> Key: HDFS-4859
> URL: https://issues.apache.org/jira/browse/HDFS-4859
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, namenode
> Affects Versions: 2.0.4-alpha
> Reporter: Kihwal Lee
>
> Due to absence of explicit timeout in FileJournalManager, error conditions
> that incur long delay (usually until driver timeout) can make namenode
> unresponsive for long time. This directly affects NN's failure detection
> latency, which is critical in HA.
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