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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3112) Distcp fails with null pointer exception.
Date Thu, 27 Mar 2008 22:34:25 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mahadev konar updated HADOOP-3112:
----------------------------------

    Description: 
Copy failed: java.lang.NullPointerException
        at org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
        at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:910)
        at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:846)
        at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:394)
        at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:285)
        at org.apache.hadoop.util.CopyFiles.setup(CopyFiles.java:743)
        at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:520)
        at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:591)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
        at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:607)

this is the null pointer exception you get when using 0.17 to distcp.

i was running using hod 
with hadoop --config hoddir distcp .....................
After investigating further with help from chris, we found out that it is using conf.getStrings
which does not have a default. Also, hadoop default conf directory is not added to the classpath
 when we run bin/hadoop on the client side. 
On copying hadoop-default.xml to my config directory it worked fine. 

we can add hadoop default conf directory to the classpath? or  use a default in the call for
conf.getStrings("io.serializations")?

I am marking this as a blocker for someone to take a look. 

  was:
Copy failed: java.lang.NullPointerException
        at org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
        at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:910)
        at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:846)
        at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:394)
        at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:285)
        at org.apache.hadoop.util.CopyFiles.setup(CopyFiles.java:743)
        at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:520)
        at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:591)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
        at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:607)

this is the null pointer exception you get when using 0.17 to distcp.

i was running using hod 
with hadoop --config hoddir distcp .....................
After investigating further with help from chris, we found out that it is using conf.getStrings
which does not have a default. Also, hadoop default conf directory is not added to the classpath
 when we run bin/hadoop on the client side. 
On copying hadoop-default.xml to my config directory it worked fine. 

we can add hadoop default conf directory to the classpath? or allow use a default in the call
for io.serializations?

I am marking this as a blocker for someone to take a look. 


> Distcp fails with null pointer exception.
> -----------------------------------------
>
>                 Key: HADOOP-3112
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3112
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Mahadev konar
>            Assignee: Robert Chansler
>            Priority: Blocker
>             Fix For: 0.17.0
>
>
> Copy failed: java.lang.NullPointerException
>         at org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
>         at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:910)
>         at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:846)
>         at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:394)
>         at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:285)
>         at org.apache.hadoop.util.CopyFiles.setup(CopyFiles.java:743)
>         at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:520)
>         at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:591)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
>         at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:607)
> this is the null pointer exception you get when using 0.17 to distcp.
> i was running using hod 
> with hadoop --config hoddir distcp .....................
> After investigating further with help from chris, we found out that it is using conf.getStrings
which does not have a default. Also, hadoop default conf directory is not added to the classpath
 when we run bin/hadoop on the client side. 
> On copying hadoop-default.xml to my config directory it worked fine. 
> we can add hadoop default conf directory to the classpath? or  use a default in the call
for conf.getStrings("io.serializations")?
> I am marking this as a blocker for someone to take a look. 

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