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https://issues.apache.org/jira/browse/FLUME-1205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arvind Prabhakar updated FLUME-1205:
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Attachment: FLUME-1205-2.patch
> NPE related to checkpointing when using FileChannel
> ---------------------------------------------------
>
> Key: FLUME-1205
> URL: https://issues.apache.org/jira/browse/FLUME-1205
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: v1.2.0
> Environment: CentOS 5.6 x64
> Reporter: Will McQueen
> Assignee: Arvind Prabhakar
> Priority: Critical
> Fix For: v1.2.0
>
> Attachments: FLUME-1205-2.patch
>
>
> I'm seeing NPE when stopping the Flume agent, and then starting it up again.
> I'm using this config file:
> 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 = c1123.hal.cloudera.com
> agent.sources.r1.port = 41414
> #
> agent.sinks.k1.channel = c1
> agent.sinks.k1.type = org.apache.flume.sink.hbase.HBaseSink
> agent.sinks.k1.table = footable5
> agent.sinks.k1.columnFamily = foocol5
> #agent.sinks.k1.batchsize = 100
> #agent.sinks.k1.serializer.rowPrefix = default
> #agent.sinks.k1.serializer.incrementRow = incRow
> #agent.sinks.k1.serializer.suffix = uuid
> agent.sinks.k1.serializer.payloadColumn = paycol
> agent.sinks.k1.serializer.incrementColumn = inccol
> ...and I'm seeing this error:
> 2012-05-15 21:40:44,553 ERROR file.Log$BackgroundWorker: General error in
> checkpoint worker
> java.lang.NullPointerException
> at org.apache.flume.channel.file.Log.getLastCheckpoint(Log.java:529)
> at org.apache.flume.channel.file.Log.access$200(Log.java:53)
> at
> org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:659)
> 2012-05-15 21:40:54,706 DEBUG zookeeper.ClientCnxn: Got ping response for
> sessionid: 0x1375308bd090014 after 0ms
> 2012-05-15 21:40:59,302 DEBUG source.NetcatSource: Starting connection handler
> 2012-05-15 21:40:59,302 DEBUG source.NetcatSource: Chars read = 512
> 2012-05-15 21:41:08,041 DEBUG zookeeper.ClientCnxn: Got ping response for
> sessionid: 0x1375308bd090014 after 0ms
> 2012-05-15 21:41:14,531 DEBUG properties.PropertiesFileConfigurationProvider:
> Checking file:/etc/flume-ng/conf/flume.conf for changes
> 2012-05-15 21:41:14,561 ERROR file.Log$BackgroundWorker: General error in
> checkpoint worker
> java.lang.NullPointerException
> at org.apache.flume.channel.file.Log.getLastCheckpoint(Log.java:529)
> at org.apache.flume.channel.file.Log.access$200(Log.java:53)
> at
> org.apache.flume.channel.file.Log$BackgroundWorker.run(Log.java:659)
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