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From "Ari Rabkin (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CHUKWA-93) SeqFileWriter initialization crashes with NPE
Date Sun, 05 Apr 2009 17:10:12 GMT

     [ https://issues.apache.org/jira/browse/CHUKWA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ari Rabkin updated CHUKWA-93:
-----------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this.  Thanks Jiaqi!

> 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 SelectChannelConnector@0.0.0.0:8080
> 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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