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https://issues.apache.org/jira/browse/HADOOP-3486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602088#action_12602088
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Sanjay Radia commented on HADOOP-3486:
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Good case to make it shorter; do you literally mean 0 sec or something short
like 5sec?
I had set the default for common mid sized cluster (100-400 nodes).
Looks like we should really do HADOOP-2444 which automates the backoff
parameter.
I guess the argument is that the person running the one node cluster needs to
right default value and that only one running a larger cluster is smart enough
to configure the
appropriate delay parameter.
> No config parameter for initial block report detail sin Hadoop-defaults.xml
> ---------------------------------------------------------------------------
>
> Key: HADOOP-3486
> URL: https://issues.apache.org/jira/browse/HADOOP-3486
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Fix For: 0.18.0
>
> Attachments: hadoopDefaults4Delay.patch
>
>
> HADOOP-2326 added a new config parameter for the initial block report that
> gets sent after DataNode registration but this config parameter was not
> documented in the Hadoop-defaults.xml
> This Jira fixes that.
> - conf/hadoop-defaults.xml uses a default value of 60 sec (as does the code)
> - src/test/haddoop-sites uses a default value of 0 sec.
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