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Posted to dev@chukwa.apache.org by "Jiaqi Tan (JIRA)" <ji...@apache.org> on 2009/04/05 01:33:12 UTC
[jira] Created: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
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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[jira] Updated: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
Posted by "Jiaqi Tan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CHUKWA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jiaqi Tan updated CHUKWA-93:
----------------------------
Attachment: CHUKWA-93.patch
Copy passed-in Configuration object in SeqFileWriter to local instance variable so that a non-null Configuration object gets passed to SequenceFile.createWriter in rotate().
> 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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[jira] Updated: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
Posted by "Jiaqi Tan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CHUKWA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jiaqi Tan updated CHUKWA-93:
----------------------------
Comment: was deleted
(was: Updated the SeqFileWriter to copy configuration object to its own instance variable to prevent passing a null configuration on to SequenceFile.createWriter)
> 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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[jira] Updated: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
Posted by "Jiaqi Tan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/CHUKWA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jiaqi Tan updated CHUKWA-93:
----------------------------
Status: Patch Available (was: Open)
Updated the SeqFileWriter to copy configuration object to its own instance variable to prevent passing a null configuration on to SequenceFile.createWriter
> 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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You can reply to this email to add a comment to the issue online.
[jira] Updated: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
Posted by "Ari Rabkin (JIRA)" <ji...@apache.org>.
[ 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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[jira] Commented: (CHUKWA-93) SeqFileWriter initialization crashes
with NPE
Posted by "Ari Rabkin (JIRA)" <ji...@apache.org>.
[ 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 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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