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From Brock Noland <br...@cloudera.com>
Subject Re: Exception : Log File is null for id
Date Tue, 02 Oct 2012 11:06:18 GMT
Hi,

What version of flume? If trunk (1.3.0-SNAPSHOT) what is the last
patch you have?

Can you how us a ls -la of your data and checkpoint directories?

Brock

On Tue, Oct 2, 2012 at 3:43 AM, Raymond Ng <raymondair@gmail.com> wrote:
> Just to add more info to this, I've checked the File channel where a
> "ChannelException: Cannot acquire capacity" is reported against, and can see
> file log-1 has the size of 0 and log-2 has over 300 MB of data, comparing
> with another File channel which has files log-2 and log-3 both with data in
> it but no file log-1 is found.
>
> sounds like log-1 is the one causing the "NullPointerException: LogFile is
> null for id 1" below, and when I restarted flume, I get the following
> warning.  I can confirm there was no manual tampering in the file channel
> directory
>
> 2012-10-02 09:38:10,231  INFO [conf-file-poller-0]
> DefaultLogicalNodeManager.java - Starting Channel probeFileChannel1
> 2012-10-02 09:38:10,239  INFO [conf-file-poller-0]
> DefaultLogicalNodeManager.java - Starting Channel probeFileChannel3
> 2012-10-02 09:38:10,313  WARN [lifecycleSupervisor-1-2] ReplayHandler.java -
> Hit EOF on /home/user/flume-ng/filechannel3/data/log-1
> 2012-10-02 09:38:10,314  INFO [lifecycleSupervisor-1-1]
> DirectMemoryUtils.java - Unable to get maxDirectMemory from VM:
> NoSuchMethodException: sun.misc.VM.maxDirectMemory(null)
> 2012-10-02 09:38:10,317  INFO [lifecycleSupervisor-1-1]
> DirectMemoryUtils.java - Direct Memory Allocation:  Allocation = 1048576,
> Allocated = 0, MaxDirectMemorySize = 954466304, Remaining = 954466304
> 2012-10-02 09:38:10,381  WARN [lifecycleSupervisor-1-1] LogFile.java -
> Checkpoint for file(/home/user/flume-ng/filechannel1/data/log-2) is:
> 1349166469095, which is beyond the requested checkpoint time: 0.
> 2012-10-02 09:38:10,381  WARN [lifecycleSupervisor-1-2] LogFile.java -
> Checkpoint for file(/home/user/flume-ng/filechannel3/data/log-2) is:
> 1349166991594, which is beyond the requested checkpoint time: 0.
> 2012-10-02 09:41:52,144 ERROR [lifecycleSupervisor-1-2] ReplayHandler.java -
> Pending takes 32103 exist after the end of replay. Duplicate messages will
> exist in destination.
> 2012-10-02 09:41:52,709  INFO [lifecycleSupervisor-1-2]
> MonitoredCounterGroup.java - Component type: CHANNEL, name:
> probeFileChannel3 started
> 2012-10-02 09:42:31,413  WARN [lifecycleSupervisor-1-1] LogFile.java -
> Checkpoint for file(/home/cluster_admin/flume-ng/filechannel1/data/log-3)
> is: 1349166981020, which is beyond the requested checkpoint time: 0.
> 2012-10-02 09:45:14,836 ERROR [lifecycleSupervisor-1-1] ReplayHandler.java -
> Pending takes 8409 exist after the end of replay. Duplicate messages will
> exist in destination.
> 2012-10-02 09:45:15,453  INFO [lifecycleSupervisor-1-1]
> MonitoredCounterGroup.java - Component type: CHANNEL, name:
> probeFileChannel1 started
>
>
> On Tue, Oct 2, 2012 at 9:19 AM, Raymond Ng <raymondair@gmail.com> wrote:
>>
>> Hi
>>
>> Could I have some advice for the following exception please, is this
>> related to the "ChannelException: Cannot acquire capacity" which I
>> experience from time to time
>>
>>
>> 2012-10-02 09:16:53,563 ERROR [Log-BackgroundWorker] Log.java - General
>> error in checkpoint worker
>> java.lang.NullPointerException
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:738)
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:692)
>>     at org.apache.flume.channel.file.Log.access$300(Log.java:57)
>>     at
>> org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:892)
>> 2012-10-02 09:16:56,317 ERROR
>> [SinkRunner-PollingRunner-DefaultSinkProcessor] HDFSEventSink.java - process
>> failed
>> java.lang.NullPointerException: LogFile is null for id 1
>>     at
>> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
>>     at org.apache.flume.channel.file.Log.get(Log.java:316)
>>     at
>> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doTake(FileChannel.java:373)
>>     at
>> org.apache.flume.channel.BasicTransactionSemantics.take(BasicTransactionSemantics.java:113)
>>     at
>> org.apache.flume.channel.BasicChannelSemantics.take(BasicChannelSemantics.java:91)
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:383)
>>     at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>>     at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>>     at java.lang.Thread.run(Thread.java:662)
>> 2012-10-02 09:16:56,318 ERROR
>> [SinkRunner-PollingRunner-DefaultSinkProcessor] SinkRunner.java - Unable to
>> deliver event. Exception follows.
>> org.apache.flume.EventDeliveryException: java.lang.NullPointerException:
>> LogFile is null for id 1
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:450)
>>     at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>>     at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>>     at java.lang.Thread.run(Thread.java:662)
>> Caused by: java.lang.NullPointerException: LogFile is null for id 1
>>     at
>> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
>>     at org.apache.flume.channel.file.Log.get(Log.java:316)
>>     at
>> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doTake(FileChannel.java:373)
>>     at
>> org.apache.flume.channel.BasicTransactionSemantics.take(BasicTransactionSemantics.java:113)
>>     at
>> org.apache.flume.channel.BasicChannelSemantics.take(BasicChannelSemantics.java:91)
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:383)
>>     ... 3 more
>> 2012-10-02 09:16:56,625 ERROR [Log-BackgroundWorker] Log.java - General
>> error in checkpoint worker
>> java.lang.NullPointerException
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:738)
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:692)
>>     at org.apache.flume.channel.file.Log.access$300(Log.java:57)
>>     at
>> org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:892)
>> 2012-10-02 09:16:59,678 ERROR [Log-BackgroundWorker] Log.java - General
>> error in checkpoint worker
>> java.lang.NullPointerException
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:738)
>>     at org.apache.flume.channel.file.Log.writeCheckpoint(Log.java:692)
>>     at org.apache.flume.channel.file.Log.access$300(Log.java:57)
>>     at
>> org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:892)
>> 2012-10-02 09:17:01,318 ERROR
>> [SinkRunner-PollingRunner-DefaultSinkProcessor] HDFSEventSink.java - process
>> failed
>> java.lang.NullPointerException: LogFile is null for id 1
>>     at
>> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
>>     at org.apache.flume.channel.file.Log.get(Log.java:316)
>>     at
>> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doTake(FileChannel.java:373)
>>     at
>> org.apache.flume.channel.BasicTransactionSemantics.take(BasicTransactionSemantics.java:113)
>>     at
>> org.apache.flume.channel.BasicChannelSemantics.take(BasicChannelSemantics.java:91)
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:383)
>>     at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>>     at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>>     at java.lang.Thread.run(Thread.java:662)
>> 2012-10-02 09:17:01,318 ERROR
>> [SinkRunner-PollingRunner-DefaultSinkProcessor] SinkRunner.java - Unable to
>> deliver event. Exception follows.
>> org.apache.flume.EventDeliveryException: java.lang.NullPointerException:
>> LogFile is null for id 1
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:450)
>>     at
>> org.apache.flume.sink.DefaultSinkProcessor.process(DefaultSinkProcessor.java:68)
>>     at org.apache.flume.SinkRunner$PollingRunner.run(SinkRunner.java:147)
>>     at java.lang.Thread.run(Thread.java:662)
>> Caused by: java.lang.NullPointerException: LogFile is null for id 1
>>     at
>> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
>>     at org.apache.flume.channel.file.Log.get(Log.java:316)
>>     at
>> org.apache.flume.channel.file.FileChannel$FileBackedTransaction.doTake(FileChannel.java:373)
>>     at
>> org.apache.flume.channel.BasicTransactionSemantics.take(BasicTransactionSemantics.java:113)
>>     at
>> org.apache.flume.channel.BasicChannelSemantics.take(BasicChannelSemantics.java:91)
>>     at
>> org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:383)
>>     ... 3 more
>>
>>
>>
>> --
>> Rgds
>> Ray
>
>
>
>
> --
> Rgds
> Ray



-- 
Apache MRUnit - Unit testing MapReduce - http://incubator.apache.org/mrunit/

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