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https://issues.apache.org/jira/browse/FLUME-2307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13888078#comment-13888078
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Hari Shreedharan commented on FLUME-2307:
-----------------------------------------
Also can you post ls -l of your checkpoint directory? When was your checkpoint
directory's contents last updated? Even if the writeCheckpoint method is called
the checkpoint may not actually have been written out (since it tries to grab
an exclusive lock on the channel).
> Old log data is not cleaned up
> ------------------------------
>
> Key: FLUME-2307
> URL: https://issues.apache.org/jira/browse/FLUME-2307
> Project: Flume
> Issue Type: Bug
> Components: Channel
> Affects Versions: v1.4.0
> Reporter: Steve Zesch
>
> I've observed Flume failing to clean up old log data in FileChannels. The
> amount of old log data can range anywhere from tens to hundreds of GB. I was
> able to confirm that the channels were in fact empty. This behavior always
> occurs after lock timeouts when attempting to put, take, rollback, or commit
> to a FileChannel. Once the timeout occurs, Flume stops cleaning up the old
> files. I was able to confirm that the Log's writeCheckpoint method was still
> being called and successfully obtaining a lock from tryLockExclusive(), but I
> was not able to confirm removeOldLogs being called. The application log did
> not include "Removing old file: log-xyz" for the old files which the Log
> class would output if they were correctly being removed. I suspect the lock
> timeouts were due to high I/O load at the time.
> Some stack traces:
> org.apache.flume.ChannelException: Failed to obtain lock for writing to the
> log. Try increasing the log write timeout value. [channel=fileChannel]
> at
> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doPut(FileChannel.java:478)
> at
> org.apache.flume.channel.BasicTransactionSemantics.put(BasicTransactionSemantics.java:93)
> at
> org.apache.flume.channel.BasicChannelSemantics.put(BasicChannelSemantics.java:80)
> at
> org.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:189)
> org.apache.flume.ChannelException: Failed to obtain lock for writing to the
> log. Try increasing the log write timeout value. [channel=fileChannel]
> at
> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doCommit(FileChannel.java:594)
> at
> org.apache.flume.channel.BasicTransactionSemantics.commit(BasicTransactionSemantics.java:151)
> at
> dataxu.flume.plugins.avro.AsyncAvroSink.process(AsyncAvroSink.java:548)
> at
> dataxu.flume.plugins.ClassLoaderFlumeSink.process(ClassLoaderFlumeSink.java:33)
> at
> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
> at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
> at java.lang.Thread.run(Thread.java:619)
> org.apache.flume.ChannelException: Failed to obtain lock for writing to the
> log. Try increasing the log write timeout value. [channel=fileChannel]
> at
> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doRollback(FileChannel.java:621)
> at
> org.apache.flume.channel.BasicTransactionSemantics.rollback(BasicTransactionSemantics.java:168)
> at
> org.apache.flume.channel.ChannelProcessor.processEventBatch(ChannelProcessor.java:194)
> at
> dataxu.flume.plugins.avro.AvroSource.appendBatch(AvroSource.java:209)
> at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.avro.ipc.specific.SpecificResponder.respond(SpecificResponder.java:91)
> at org.apache.avro.ipc.Responder.respond(Responder.java:151)
> at
> org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.messageReceived(NettyServer.java:188)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
> at
> org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:173)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:792)
> at
> org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
> at
> org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:321)
> at
> org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:303)
> at
> org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:220)
> at
> org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
> at
> org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
> at
> org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
> at
> org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
> at
> org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:94)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.processSelectedKeys(AbstractNioWorker.java:364)
> at
> org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:238)
> at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:38)
> at
> org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Channel Config:
> agent.channels.fileChannel.type = file
> agent.channels.fileChannel.checkpointDir =
> /var/log/flume-ng/channels/fileChannel/checkpoint
> agent.channels.fileChannel.dataDirs =
> /var/log/flume-ng/channels/fileChannel/data
> agent.channels.fileChannel.capacity = 100000000
> agent.channels.fileChannel.transactionCapacity = 100000000
> agent.channels.fileChannel.maxFileSize = 104857600
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