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From "Christian Kunz (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (MAPREDUCE-1286) Quotes in environment HADOOP_CLIENT_OPTS confuse parsing if this env is concatenated with something else
Date Mon, 21 Jun 2010 01:37:24 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1286?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christian Kunz reopened MAPREDUCE-1286:
---------------------------------------


I would vote to declare this as blocker for 0.20.

It not only affects hadoop streaming, but also system calls using the hadoop command line
utility will fail like:

Exception in thread "main" java.lang.NoClassDefFoundError: "-Dhadoop/tasklog/taskid=attempt_201006181908_0498_m_000000_0
Caused by: java.lang.ClassNotFoundException: "-Dhadoop.tasklog.taskid=attempt_201006181908_0498_m_000000_0
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: "-Dhadoop.tasklog.taskid=attempt_201006181908_0498_m_000000_0.
 Program will exit.

> Quotes in environment HADOOP_CLIENT_OPTS confuse parsing if this env is concatenated
with something else
> --------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1286
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1286
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: task
>    Affects Versions: 0.20.2
>         Environment: Linux F12; streaming
>            Reporter: Yuri Pradkin
>            Assignee: Yuri Pradkin
>         Attachments: mr-1286
>
>
> I use streaming and in the perl-reducer I write to hdfs using  a pipe to hdfs -put -
....    It turns out that because TaskRunner sets the environment HADOOP_CLIENT_OPTS in double
quotes, when hdfs shell script concatenates these with something else, the command fails:
.e.g java -Dblah=x -Dfoo=y "-Dhadoop.tasklog.taskid=z -Dhadoop.tasklog.totalLogFileSize=s"...
> Since I don't see any reason to have these double quotes in the original code; I propose
they're removed.

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