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Hadoop, mail # dev - Which java code(file) generates the heartbeat from the datanode and which code(file) listen that heartbeat on the namenode?


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Mohammad Mustaqeem 2013-04-11, 06:03
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Chris Nauroth 2013-04-11, 18:55
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Re: Which java code(file) generates the heartbeat from the datanode and which code(file) listen that heartbeat on the namenode?
Mohammad Mustaqeem 2013-04-12, 10:08
Chris, thank you :)
I am using branch 2.
Can you tell me which code receives the heartbeat?
and which code selects the random rack for replication?
On Fri, Apr 12, 2013 at 12:25 AM, Chris Nauroth <[EMAIL PROTECTED]>wrote:

> Hello Mohammad,
>
> Which version of the codebase?
>
> If it's trunk or branch-2, then for the datanode side, I recommend starting
> from
>
> hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java.
>  Look for a method named sendHeartBeat.  On the namenode side, look at
>
> hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java.
>  Look for a method named sendHeartbeat.  (Notice the slight difference in
> capitalization of letter 'b'.)
>
> If it's a different branch, let me know, and I'd be happy to provide help
> on the specifics of that branch.
>
> Hope this helps,
> --Chris
>
>
> On Wed, Apr 10, 2013 at 11:03 PM, Mohammad Mustaqeem <
> [EMAIL PROTECTED]
> > wrote:
>
> > Which java code(file) generates the heartbeat from the datanode and
> > which code(file) listen that heartbeat on the namenode?
> > --
> > *With regards ---*
> > *Mohammad Mustaqeem*,
> > M.Tech (CSE)
> > MNNIT Allahabad
> > 9026604270
> >
>

--
*With regards ---*
*Mohammad Mustaqeem*,
M.Tech (CSE)
MNNIT Allahabad
9026604270
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Chris Nauroth 2013-04-12, 21:17