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https://issues.apache.org/jira/browse/CHUKWA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12695836#action_12695836
]
Ari Rabkin commented on CHUKWA-93:
----------------------------------
yep. That's a good catch, thanks!
+1 to patch
> SeqFileWriter initialization crashes with NPE
> ---------------------------------------------
>
> Key: CHUKWA-93
> URL: https://issues.apache.org/jira/browse/CHUKWA-93
> Project: Hadoop Chukwa
> Issue Type: Bug
> Components: data collection
> Affects Versions: 0.1.2
> Environment: Linux, Hadoop 0.21.0-dev (trunk), Chukwa 0.1.2, Java 6
> Reporter: Jiaqi Tan
> Attachments: CHUKWA-93.patch
>
>
> jettyCollector fails to start up with default SeqFileWriter when no
> particular writer is configured.
> Log message from collector.log:
> 2009-04-04 17:12:01,968 INFO main ChukwaConfiguration - chukwaConf is
> /home/jiaqi/code/deploy/chukwa/build/bin/../conf
> 2009-04-04 17:12:02,090 INFO main log - Logging to
> org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via
> org.mortbay.log.Slf4jLog
> 2009-04-04 17:12:02,138 INFO main log - jetty-6.1.14
> 2009-04-04 17:12:02,206 INFO main root - initing servletCollector
> 2009-04-04 17:12:02,210 INFO main SeqFileWriter - rotateInterval is 300000
> 2009-04-04 17:12:02,210 INFO main SeqFileWriter - outputDir is
> /user/jiaqi/chukwa/logs/
> 2009-04-04 17:12:02,210 INFO main SeqFileWriter - fsname is
> hdfs://localhost:9000/
> 2009-04-04 17:12:02,210 INFO main SeqFileWriter - filesystem type from
> core-default.xml is org.apache.hadoop.hdfs.DistributedFileSystem
> 2009-04-04 17:12:02,425 INFO main SeqFileWriter - filesystem is
> hdfs://localhost:9000
> 2009-04-04 17:12:02,429 INFO main SeqFileWriter - start Date [Sat Apr 04
> 17:12:02 EDT 2009]
> 2009-04-04 17:12:02,429 INFO main SeqFileWriter - Rotate from main
> 2009-04-04 17:12:02,461 ERROR main / - unavailable
> java.lang.NullPointerException
> at
> org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
> at
> org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:907)
> at
> org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:856)
> at
> org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:779)
> at
> org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:538)
> at
> org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:564)
> at
> org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter.rotate(SeqFileWriter.java:227)
> at
> org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter.init(SeqFileWriter.java:132)
> at
> org.apache.hadoop.chukwa.datacollection.collector.servlet.ServletCollector.init(ServletCollector.java:106)
> at
> org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:431)
> at
> org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
> at
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
> at
> org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:643)
> at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
> at
> org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
> at
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
> at
> org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
> at org.mortbay.jetty.Server.doStart(Server.java:222)
> at
> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
> at
> org.apache.hadoop.chukwa.datacollection.collector.CollectorStub.main(CollectorStub.java:91)
> 2009-04-04 17:12:02,475 INFO main log - Started
> [email protected]:8080
> 2009-04-04 17:12:03,217 INFO Timer-1 root -
> stats:ServletCollector,numberHTTPConnection:0,numberchunks:0
> 2009-04-04 17:13:03,206 INFO Timer-1 root -
> stats:ServletCollector,numberHTTPConnection:0,numberchunks:0
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