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https://issues.apache.org/jira/browse/HDFS-4617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-4617:
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Component/s: qjm
> warning while purging logs with QJM enabled
> -------------------------------------------
>
> Key: HDFS-4617
> URL: https://issues.apache.org/jira/browse/HDFS-4617
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, namenode, qjm
> Affects Versions: 2.0.3-alpha
> Reporter: Todd Lipcon
>
> HDFS-2946 changed the way that edit log purging is calculated, such that it
> calls selectInputStreams() with an arbitrary transaction ID calculated
> relative to the current one. The JournalNodes will reject such a request if
> that transaction ID falls in the middle of a segment (which it usually will).
> This means that selectInputStreams gets an exception, and the QJM journal
> manager is not included in this calculation. Additionally, a warning will be
> logged.
> Purging itself still happens, because the detailed information on remote logs
> is not necessary to calculate a retention interval, but the feature from
> HDFS-2946 may not work as intended.
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