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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11112) Journal Nodes should refuse to format non-empty directories
Date Tue, 08 Nov 2016 14:03:58 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yiqun Lin updated HDFS-11112:
-----------------------------
    Status: Patch Available  (was: Open)

Attach a initial patch. Please have a review. Thanks!

> Journal Nodes should refuse to format non-empty directories
> -----------------------------------------------------------
>
>                 Key: HDFS-11112
>                 URL: https://issues.apache.org/jira/browse/HDFS-11112
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Arpit Agarwal
>            Assignee: Yiqun Lin
>         Attachments: HDFS-11112.001.patch
>
>
> Journal Nodes should reject the {{format}} RPC request if a storage directory is non-empty.
The relevant code is in {{JNStorage#format}}.
> {code}
>   void format(NamespaceInfo nsInfo) throws IOException {
>     setStorageInfo(nsInfo);
> ...
>     unlockAll();
>     sd.clearDirectory();
>     writeProperties(sd);
>     createPaxosDir();
>     analyzeStorage();
> {code}
> This would make the behavior similar to {{namenode -format -nonInteractive}}.



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