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https://issues.apache.org/jira/browse/HDFS-2988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13282004#comment-13282004
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Miomir Boljanovic commented on HDFS-2988:
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Hi gentlemen,
As as an experienced Java developer but novice opensource contributor I still
have a bit doubt about how to start.
I picked out this issue in order to familiarize myself with the the process and
to understand mechanics of a commit.
I wonder therefore, if the issue needs to be assigned to me before I start
working on it?
Cheers,
Miomir Boljanovic
> Improve error message when storage directory lock fails
> -------------------------------------------------------
>
> Key: HDFS-2988
> URL: https://issues.apache.org/jira/browse/HDFS-2988
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: Todd Lipcon
> Priority: Minor
> Labels: newbie
>
> Currently, the error message is fairly opaque to a non-developer ("Cannot
> lock storage" or something). Instead, we should have some improvments:
> - when we create the in_use.lock file, we should write the hostname/PID that
> locked the file
> - if the lock fails, and in_use.lock exists, the error message should say
> something like "It appears that another namenode (pid 23423 on host
> foo.example.com) has already locked the storage directory."
> - if the lock fails, and no lock file exists, the error message should say
> something like "if this storage directory is mounted via NFS, ensure that the
> appropriate nfs lock services are running."
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