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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3582) Hook daemon process exit for testing
Date Tue, 10 Jul 2012 07:57:36 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13410119#comment-13410119
] 

Steve Loughran commented on HDFS-3582:
--------------------------------------

I wouldn't justify this fix purely for testing, though HADOOP-8096 shows utility at run time.

It is not the Hadoop team's fault that Surefire can't handle process exit calls, especially
given that Apache Ant has happily done so for twelve years.

The OSGi-centric patch should apply to the whole codebase, not just HDFS.
                
> Hook daemon process exit for testing 
> -------------------------------------
>
>                 Key: HDFS-3582
>                 URL: https://issues.apache.org/jira/browse/HDFS-3582
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: test
>    Affects Versions: 2.0.0-alpha
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>            Priority: Minor
>         Attachments: hdfs-3582.txt, hdfs-3582.txt, hdfs-3582.txt, hdfs-3582.txt, hdfs-3582.txt
>
>
> Occasionally the tests fail with "java.util.concurrent.ExecutionException: org.apache.maven.surefire.booter.SurefireBooterForkException:
> Error occurred in starting fork, check output in log" because the NN is exit'ing (via
System#exit or Runtime#exit). Unfortunately Surefire doesn't retain the log output (see SUREFIRE-871)
so the test log is empty, we don't know which part of the test triggered which exit in HDFS.
To make this easier to debug let's hook all daemon process exits when running the tests.

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