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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-309) NullPointerException in StatusHttpServer
Date Tue, 20 Jun 2006 04:32:32 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-309?page=all ]

Owen O'Malley updated HADOOP-309:
---------------------------------

    Fix Version: 0.4.0
       Priority: Minor  (was: Major)

As we discussed offline, this is just caused because you didn't define a value for "hadoop.log.dir"
on your java command line. It would be good to have the server not crash when the property
is not defined, but the property should be defined for the servers. The two obvious "fixes"
are to:
  1. Remove the "/logs" context when no "hadoop.log.dir" property is defined. This will be
confusing to users.
  2. See if we can get the value from log4j via the jakarta commons logging api. It looks
like there might be routines that will work.

In any case, I believe this is a pretty low priority bug.

> 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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