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https://issues.apache.org/jira/browse/FLUME-1318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410468#comment-13410468
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Inder SIngh commented on FLUME-1318:
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Mubarak/Arvind,
i am going to look into this and revert with more details.
> Graceful shutdown and drain for memory channel
> ----------------------------------------------
>
> Key: FLUME-1318
> URL: https://issues.apache.org/jira/browse/FLUME-1318
> Project: Flume
> Issue Type: Improvement
> Components: Channel, Sinks+Sources
> Reporter: Mubarak Seyed
> Labels: newbie
>
> It appears from our test that if i go and shutdown the agent which uses
> memory channel, there is no clean way of throttling incoming requests to
> source, draining events from memory channel and do clean graceful shutdown of
> an agent. We don't have a visibility of how much data(events) in memory
> channel are getting dropped when shutdown happens.
> It would be good if we add a method to throttle incoming requests to source,
> drain events from memory channel and then shutdown sink/channel/source. (We
> can certainly add counters/metrics as part of channel monitoring). I think
> file-channel covers by adding it to WAL.
> HBase RegionServer shutdown handler does the some drain process (it syncs the
> edits in Write-Ahead-Log and notifies the master for regions move/assignment)
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