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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3507) DFS#isInSafeMode needs to execute only on Active NameNode
Date Thu, 15 Nov 2012 23:57:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498456#comment-13498456

Aaron T. Myers commented on HDFS-3507:

Hi Vinay, the latest patch looks pretty good to me, except that the current patch doesn't
default the value of the checked field in the .proto file, as I already commented it should.
It should be something like this:

 message SetSafeModeRequestProto {
   required SafeModeActionProto action = 1;
+  optional bool checked = 2 [default = false];
> DFS#isInSafeMode needs to execute only on Active NameNode
> ---------------------------------------------------------
>                 Key: HDFS-3507
>                 URL: https://issues.apache.org/jira/browse/HDFS-3507
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Vinay
>            Assignee: Vinay
>            Priority: Critical
>         Attachments: HDFS-3507.patch, HDFS-3507.patch, HDFS-3507.patch
> Currently DFS#isInSafeMode is not Checking for the NN state. It can be executed on any
of the NNs.
> But HBase will use this API to check for the NN safemode before starting up its service.
> If first NN configured is in standby then DFS#isInSafeMode will check standby NNs safemode
but hbase want state of Active NN.

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