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https://issues.apache.org/jira/browse/FLUME-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289159#comment-13289159
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Hari Shreedharan commented on FLUME-1232:
-----------------------------------------
Thanks Juhani. This is interesting. Could you please share your logs and exact
steps to reproduce. I have been able to reproduce with Will's steps above.
> Cannot start agent a 3rd time when using FileChannel
> ----------------------------------------------------
>
> Key: FLUME-1232
> URL: https://issues.apache.org/jira/browse/FLUME-1232
> Project: Flume
> Issue Type: Bug
> Components: Channel
> Affects Versions: v1.2.0
> Environment: RHEL 5.6 64-bit
> Reporter: Will McQueen
> Assignee: Arvind Prabhakar
> Priority: Blocker
> Fix For: v1.2.0
>
>
> Steps:
> 1) Start clean by wiping-out FileChannel's existing checkpoint dir and data
> dir
> 2) Configure the agent to use filechannel (type = FILE). THe config file I
> used is at the end of this text.
> 3) Start the agent, confirm lock files exist in data and checkpoint dirs,
> stop agent, confirm lock files are remove from data and checkpoint dirs.
> 4) Repeat step 3
> 5) Start the agent. The following exceptions are shown in the logs:
> 2012-05-29 03:15:36,453 DEBUG file.ReplayHandler: record.getTimestamp() =
> 1338286275813, lastCheckpoint = 1338286279596, fileId = 1, offset = 1924,
> type = Commit, transaction 1338285619250
> 2012-05-29 03:15:36,453 DEBUG file.ReplayHandler: record.getTimestamp() =
> 1338286279783, lastCheckpoint = 1338286279596, fileId = 1, offset = 1949,
> type = Take, transaction 1338285619251
> 2012-05-29 03:15:36,453 DEBUG file.ReplayHandler: record.getTimestamp() =
> 1338286279784, lastCheckpoint = 1338286279596, fileId = 1, offset = 1980,
> type = Commit, transaction 1338285619251
> 2012-05-29 03:15:36,453 DEBUG file.ReplayHandler: Processing commit of Take
> 2012-05-29 03:15:36,453 INFO file.ReplayHandler: Replayed 1 from
> /var/run/flume-ng/.flume/file-channel/data/log-1
> 2012-05-29 03:15:36,453 INFO file.ReplayHandler: Replaying
> /var/run/flume-ng/.flume/file-channel/data/log-2
> 2012-05-29 03:15:36,454 DEBUG file.ReplayHandler: record.getTimestamp() =
> 1338286370280, lastCheckpoint = 1338286279596, fileId = 2, offset = 8, type =
> Take, transaction 1338286369982
> 2012-05-29 03:15:36,454 DEBUG file.ReplayHandler: record.getTimestamp() =
> 1338286370287, lastCheckpoint = 1338286279596, fileId = 2, offset = 39, type
> = Commit, transaction 1338286369982
> 2012-05-29 03:15:36,454 DEBUG file.ReplayHandler: Processing commit of Take
> 2012-05-29 03:15:36,454 INFO file.ReplayHandler: Unable to remove
> FlumeEventPointer [fileID=1, offset=1853] added to pending list
> 2012-05-29 03:15:36,454 INFO file.ReplayHandler: Replayed 1 from
> /var/run/flume-ng/.flume/file-channel/data/log-2
> 2012-05-29 03:15:36,454 DEBUG file.ReplayHandler: Pending take
> FlumeEventPointer [fileID=1, offset=1853]
> 2012-05-29 03:15:36,455 ERROR file.Log: Failed to initialize Log
> java.lang.IllegalStateException: Pending takes 1 exist after the end of replay
> at
> com.google.common.base.Preconditions.checkState(Preconditions.java:145)
> at
> org.apache.flume.channel.file.ReplayHandler.replayLog(ReplayHandler.java:137)
> at org.apache.flume.channel.file.Log.replay(Log.java:205)
> at
> org.apache.flume.channel.file.FileChannel.start(FileChannel.java:180)
> at
> org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:228)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> 2012-05-29 03:15:36,457 ERROR lifecycle.LifecycleSupervisor: Unable to start
> org.apache.flume.channel.file.FileChannel@1ac88440 - Exception follows.
> java.lang.IllegalStateException: Log is closed
> at
> com.google.common.base.Preconditions.checkState(Preconditions.java:145)
> at org.apache.flume.channel.file.Log.getFlumeEventQueue(Log.java:226)
> at
> org.apache.flume.channel.file.FileChannel.getDepth(FileChannel.java:253)
> at
> org.apache.flume.channel.file.FileChannel.start(FileChannel.java:187)
> at
> org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:228)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> 2012-05-29 03:15:36,458 ERROR flume.SinkRunner: Unhandled exception, logging
> and sleeping for 5000ms
> java.lang.IllegalStateException: Channel closed
> at
> com.google.common.base.Preconditions.checkState(Preconditions.java:145)
> at
> org.apache.flume.channel.file.FileChannel.createTransaction(FileChannel.java:237)
> at
> org.apache.flume.channel.BasicChannelSemantics.getTransaction(BasicChannelSemantics.java:118)
> at org.apache.flume.sink.LoggerSink.process(LoggerSink.java:61)
> at
> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
> at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
> at java.lang.Thread.run(Thread.java:662)
> 2012-05-29 03:15:39,460 INFO file.FileChannel: Starting FileChannel with
> dataDir [/var/run/flume-ng/.flume/file-channel/data]
> 2012-05-29 03:15:39,460 INFO file.Log: Cannot lock
> /var/run/flume-ng/.flume/file-channel/checkpoint. The directory is already
> locked.
> 2012-05-29 03:15:39,461 ERROR lifecycle.LifecycleSupervisor: Unable to start
> org.apache.flume.channel.file.FileChannel@1ac88440 - Exception follows.
> java.lang.RuntimeException: java.io.IOException: Cannot lock
> /var/run/flume-ng/.flume/file-channel/checkpoint. The directory is already
> locked.
> at com.google.common.base.Throwables.propagate(Throwables.java:156)
> at
> org.apache.flume.channel.file.FileChannel.start(FileChannel.java:182)
> at
> org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:228)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
> Config file I used (flume.conf):
> agent.channels = c1
> agent.sources = r1
> agent.sinks = k1
> #
> agent.channels.c1.type = FILE
> #
> agent.sources.r1.channels = c1
> agent.sources.r1.type = NETCAT
> agent.sources.r1.bind = 0.0.0.0
> agent.sources.r1.port = 41414
> #
> agent.sinks.k1.channel = c1
> agent.sinks.k1.type = LOGGER
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