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I have been unable to connect a debugger to a java workflow.

I do not wish to open up the whole of the hadoop jobs to debug (as specified in many places, e.g. How to debug hadoop mapreduce jobs from eclipse?, or REMOTE DEBUGGING OF HADOOP JOB WITH ECLIPSE, etc...). I wish to debug a single(!) workflow.

I have a small cluster (3 machines), and I wish to debug in this simulated dev environment.

I had tried to specify the following in the workflow:

<property>
    <name>mapred.child.java.opts</name>
    <value>-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=12121</value>
</property>

But this had not worked.

One thing else is that I am actually running this as a sub-workflow

Suggestions?

Community
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Yaneeve
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1 Answers1

0

You only have to include this ...

<property>
   <name>oozie.launcher.mapred.child.java.opts</name>
   <value>-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=12121</value>
</property>

or, in my case ...

<property>
   <name>oozie.launcher.mapred.child.java.opts</name>
   <value>-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=7777</value>
</property>
Ángel Álvarez Pascua
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