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Posted to common-issues@hadoop.apache.org by "Deep (Jira)" <ji...@apache.org> on 2019/12/30 18:38:00 UTC

[jira] [Created] (HADOOP-16782) Loading jdwp with HADOOP_CLIENT_OPTS throws an error

Deep created HADOOP-16782:
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             Summary: Loading jdwp with HADOOP_CLIENT_OPTS throws an error
                 Key: HADOOP-16782
                 URL: https://issues.apache.org/jira/browse/HADOOP-16782
             Project: Hadoop Common
          Issue Type: Bug
          Components: scripts
    Affects Versions: 3.2.0
         Environment: OS: Ubuntu 18.04.3 LTS
            Reporter: Deep


I'm trying to debug 'distcp' by setting any of the following options:

export HADOOP_CLIENT_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=5012,server=y,suspend=n"

export MAPRED_DISTCP_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=5012,server=y,suspend=n"

When I attempt to load jdwp with HADOOP_CLIENT_OPTS, 'NAMENODES' variable in 'start-dfs.sh' is incorrectly set to this value: "Listening for transport dt_socket at address: 5012 localhost".

When I attempt to load jdwp with MAPRED_DISTCP_OPTS, it is not even read by 'start-dfs.sh'

I followed the instructions specified here:

[https://hadoop.apache.org/docs/r3.2.0/hadoop-project-dist/hadoop-common/UnixShellGuide.html]

Goal is to debug 'distcp' so if there is an alternative way, that works as well.



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