Todd Lipcon created HDFS-4617:
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Summary: 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
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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