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From "Jiaqi Tan (JIRA)" <j...@apache.org>
Subject [jira] Created: (CHUKWA-93) SeqFileWriter initialization crashes with NPE
Date Sat, 04 Apr 2009 23:33:12 GMT
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


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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