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From "Kirk True (JIRA)" <>
Subject [jira] Created: (CHUKWA-465) Misconfiguration leads to NullPointerException in code
Date Wed, 17 Mar 2010 00:37:30 GMT
Misconfiguration leads to NullPointerException in code

                 Key: CHUKWA-465
             Project: Hadoop Chukwa
          Issue Type: Bug
          Components: Data Processors
    Affects Versions: 0.4.0
         Environment: OS:

Fedora 12
Linux #1 SMP Wed Mar 3 04:40:41 UTC 2010
x86_64 x86_64 x86_64 GNU/Linux


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(
	at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.start(
	at org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.main(

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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