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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5254) Xinclude setup results in a stack trace
Date Fri, 13 Mar 2009 12:11:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12681689#action_12681689
] 

Steve Loughran commented on HADOOP-5254:
----------------------------------------

The extra diagnostics flag up that some XML parsers (xerces 2.6.2?) can wait until a document
is created before bailing out; this could be a sign of factory problems rather than just XML
parser support issues; looking at the CP there are two Xerces versions there (2.6.2. and 2.9.1);
clearly the wrong one is being used. 

{code}
09/03/13 12:01:04 [JobTracker] FATAL conf.Configuration : Error parsing configuration resource
core-default.xml :
 javax.xml.parsers.ParserConfigurationException: Feature 'http://apache.org/xml/features/xinclude'
is not recognized.
javax.xml.parsers.ParserConfigurationException: Feature 'http://apache.org/xml/features/xinclude'
is not recognized.
        at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source)
        at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:1063)
        at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:1032)
        at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:982)
        at org.apache.hadoop.conf.Configuration.get(Configuration.java:384)
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:805)
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:835)
        at org.apache.hadoop.mapred.JobTracker.getInstrumentationClass(JobTracker.java:1633)
        at org.apache.hadoop.mapred.JobTracker.innerStart(JobTracker.java:1472)
        at org.apache.hadoop.util.Service.start(Service.java:186)
{code}

# We could check in the extra diagnostics here -stack trace and file at fault; this will help
others
# We could have a catch for a ParserConfigurationException and include an error message that
points the viewer at a wiki page where we point to this bugrep and anything else relevant


> Xinclude setup results in a stack trace
> ---------------------------------------
>
>                 Key: HADOOP-5254
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5254
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.20.0, 0.21.0
>         Environment: java version "1.6.0_02"
> Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
> BEA JRockit(R) (build R27.4.0-90-89592-1.6.0_02-20070928-1715-linux-x86_64, compiled
mode)
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: hadoop-5254.patch
>
>
> seen this in SVN_HEAD, and it was mentioned on the user list in the week. It explains
why my health tests are failing on class.ForName(FSConstants)
> gistration(127.0.0.1:8024, storageID=DS-1466307248-127.0.1.1-8024-1234537374021, infoPort=8022,
ipcPort=50020):DataXceiver
> [sf-startdaemon-debug] java.lang.ExceptionInInitializerError
> [sf-startdaemon-debug] 	at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:76)
> [sf-startdaemon-debug] 	at java.lang.Thread.run(Thread.java:619)
> [sf-startdaemon-debug] Caused by: java.lang.UnsupportedOperationException: This parser
does not support specification "null" version "null"
> [sf-startdaemon-debug] 	at javax.xml.parsers.DocumentBuilderFactory.setXIncludeAware(DocumentBuilderFactory.java:590)

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