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Date: Wed, 17 Mar 2010 00:39:27 +0000 (UTC)
From: "Kirk True (JIRA)" <jira@apache.org>
To: chukwa-dev@hadoop.apache.org
Subject: [jira] Updated: (CHUKWA-465) Misconfiguration leads to
 NullPointerException in PostProcessorManager
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     [ https://issues.apache.org/jira/browse/CHUKWA-465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kirk True updated CHUKWA-465:
-----------------------------

    Summary: Misconfiguration leads to NullPointerException in PostProcessorManager  (was: Misconfiguration leads to NullPointerException in code)

> Misconfiguration leads to NullPointerException in PostProcessorManager
> ----------------------------------------------------------------------
>
>                 Key: CHUKWA-465
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-465
>             Project: Hadoop Chukwa
>          Issue Type: Bug
>          Components: Data Processors
>    Affects Versions: 0.4.0
>         Environment: OS:
> Fedora 12
> Linux skinner.mustardgrain.com 2.6.32.9-70.fc12.x86_64 #1 SMP Wed Mar 3 04:40:41 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
> Java:
> java version "1.6.0_18"
> Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
> Java HotSpot(TM) 64-Bit Server VM (build 16.0-b13, mixed mode)
>            Reporter: Kirk True
>            Priority: Minor
>
> I didn't know to copy chukwa-demux-conf.xml.template to chukwa-demux-conf.xml and got this error in postprocess.log:
> ----------------------------------------------
> 2010-03-16 16:46:18,150 INFO main PostProcessorManager - PostProcess Start, directory:/chukwa/postProcess/demuxOutputDir_1268783176828
> 2010-03-16 16:46:18,151 ERROR main PostProcessorManager - java.lang.NullPointerException
> 	at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.processDemuxPigOutput(PostProcessorManager.java:173)
> 	at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.start(PostProcessorManager.java:145)
> 	at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.main(PostProcessorManager.java:80)
> 2010-03-16 16:46:18,151 WARN main PostProcessorManager - Error in processDemuxOutput for :/chukwa/postProcess/demuxOutputDir_1268783176828
> 2010-03-16 16:46:18,175 WARN main PostProcessorManager - Error in postProcess  :/chukwa/postProcess/demuxOutputDir_1268783176828 has been moved to:/chukwa/postProcessInError//demuxOutputDir_1268783176828_1268783178154
> ----------------------------------------------
> The problem is here:
>     String[] classes = conf.get(POST_DEMUX_DATA_LOADER).split(",");
> In my case (again, due to bad configuration) that configuration file is missing and so we end up trying to split through a null reference.
> *Note*: I got this code from trunk, revision 924074.

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