Sangjin Lee created YARN-3949:
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Summary: ensure timely flush of timeline writes
Key: YARN-3949
URL: https://issues.apache.org/jira/browse/YARN-3949
Project: Hadoop YARN
Issue Type: Sub-task
Components: timelineserver
Affects Versions: YARN-2928
Reporter: Sangjin Lee
Assignee: Sangjin Lee
Currently flushing of timeline writes is not really handled. For example,
{{HBaseTimelineWriterImpl}} relies on HBase's {{BufferedMutator}} to batch and
write puts asynchronously. However, {{BufferedMutator}} may not flush them to
HBase unless the internal buffer fills up.
We do need a flush functionality first to ensure that data are written in a
reasonably timely manner, and to be able to ensure some critical writes are
done synchronously (e.g. key lifecycle events).
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