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Posted to dev@flume.apache.org by "Hari Shreedharan (JIRA)" <ji...@apache.org> on 2013/07/02 09:58:20 UTC
[jira] [Commented] (FLUME-2118) Occasional multi-hour pauses in
file channel replay
[ https://issues.apache.org/jira/browse/FLUME-2118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13697590#comment-13697590 ]
Hari Shreedharan commented on FLUME-2118:
-----------------------------------------
I did see someone send out a similar issue on the dev@ lists. I will take a look at this once I get some time.
> Occasional multi-hour pauses in file channel replay
> ---------------------------------------------------
>
> Key: FLUME-2118
> URL: https://issues.apache.org/jira/browse/FLUME-2118
> Project: Flume
> Issue Type: Bug
> Components: File Channel
> Affects Versions: v1.5.0
> Reporter: Juhani Connolly
>
> Sometimes during replay, immediately after an EOF of one log, the replay will pause for a long time.
> Here are two samples from this morning when we restarted our 3 aggregators and 2 of them hit this issue.
> 02 7 2013 03:06:30,089 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2200000 records
> 02 7 2013 03:06:30,179 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2210000 records
> 02 7 2013 03:06:30,241 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.LogFile$SequentialReader.next:505) - Encountered EOF at 1623195625 in /data2/flume-data/log-1184
> 02 7 2013 06:23:27,629 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2220000 records
> 02 7 2013 06:23:28,641 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2230000 records
> 02 7 2013 06:23:29,162 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2240000 records
> 02 7 2013 06:23:30,118 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2250000 records
> 02 7 2013 06:23:30,750 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2260000 records
> 02 7 2013 08:03:00,942 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2160000 records
> 02 7 2013 08:03:01,055 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2170000 records
> 02 7 2013 08:03:01,168 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2180000 records
> 02 7 2013 08:03:01,181 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.LogFile$SequentialReader.next:505) - Encountered EOF at 1623195640 in /data2/flume-data/log-1182
> 02 7 2013 14:45:55,302 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2190000 records
> 02 7 2013 14:45:56,282 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2200000 records
> 02 7 2013 14:45:57,084 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2210000 records
> 02 7 2013 14:45:59,043 INFO [lifecycleSupervisor-1-0] (org.apache.flume.channel.file.ReplayHandler.replayLog:292) - Read 2220000 records
> I've tried for an hour and some to track down the cause of this. There's nothing suspicious turning up on ganglia, and a cursory review of the code didn't turn up anything overly suspicious. Owing to time limitations I can't dig further at this time.
> We run a version of flume from somewhat before the current 1.4 release candidate(hash is eefefa941a60c0982f0957804be0cafb4d83e46e) there doesn't appear to be any replay patches since then.
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