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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-309) NullPointerException in StatusHttpServer
Date Tue, 20 Jun 2006 06:01:30 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-309?page=comments#action_12416851 ] 

Devaraj Das commented on HADOOP-309:
------------------------------------

These were the exact same problems I encountered when I ran the unit tests. I had to define
hadoop.log.dir (in the build.xml file) and had to put the "build" directory (which contains
the webapps) in the CLASSPATH.

> NullPointerException in StatusHttpServer
> ----------------------------------------
>
>          Key: HADOOP-309
>          URL: http://issues.apache.org/jira/browse/HADOOP-309
>      Project: Hadoop
>         Type: Bug

>   Components: mapred, dfs
>     Versions: 0.3.2
>     Reporter: Konstantin Shvachko
>     Priority: Minor
>      Fix For: 0.4.0

>
> The NullPointerException happens in the constructor of StatusHttpServer because the System
property "hadoop.log.dir" is undefined.
> I see it trying to start the Namenode directly without using any scripts.
> Exception in thread "main" java.lang.NullPointerException
> 	at org.mortbay.util.Resource.newResource(Resource.java:99)
> 	at org.mortbay.http.ResourceCache.setResourceBase(ResourceCache.java:140)
> 	at org.mortbay.http.HttpContext.setResourceBase(HttpContext.java:2207)
> 	at org.apache.hadoop.mapred.StatusHttpServer.<init>(StatusHttpServer.java:66)
> 	at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:172)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:97)
> 	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:88)
> 	at org.apache.hadoop.dfs.NameNode.main(NameNode.java:496)
> In general I think the sources should not rely on the system properties and environment
variables defined in hadoop scripts.

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