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https://issues.apache.org/jira/browse/FLUME-1665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13481420#comment-13481420
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Hari Shreedharan commented on FLUME-1665:
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Why do we need to sync inflightPuts and inflightTakes to disk when the channel
is stopping? Inflights are only meant to make sure replay is consistent when
replaying from a checkpoint. During replay the checkpoint is mmap-ed and the
inflights are replayed into the checkpoint, then the logs are replayed from
that point.
Inflights are essentially events in flight during a checkpoint and need not be
synced to disk during shutdown.
> Data from FileChannel will be duplicated when restarting configuration
> ----------------------------------------------------------------------
>
> Key: FLUME-1665
> URL: https://issues.apache.org/jira/browse/FLUME-1665
> Project: Flume
> Issue Type: Bug
> Components: Channel
> Affects Versions: v1.2.0, v1.3.0
> Reporter: Denny Ye
> Labels: FileChannel
>
> When Flume process was running, I changed configuration property and Flume
> rebooted without process restarting. Events will be duplicated in next loop,
> also has been consumed before all components have stopped.
> I found the root cause. When FileChannel was stopping, it should save the
> 'inflightPuts' and 'inflightTakes' into disk for preparing in next loop.
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