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From Vinod Kumar Vavilapalli <vino...@hortonworks.com>
Subject Re: Why none AppMaster node seeks IPCServer on itself.
Date Wed, 08 Jan 2014 18:28:31 GMT
Checked the firewall rules?

+Vinod

On Jan 8, 2014, at 3:22 AM, Saeed Adel Mehraban <s.adel07@gmail.com> wrote:

> Hi all.
> I have an installation on Hadoop on 3 nodes, namely master, slave1 and slave2. When I
try to run a job, assuming appmaster be on slave1, every map and reduce tasks which take place
on slave2 will fail due to ConnectException.
> I checked the port which slave2 wants to connect to. It differs randomly each time, but
when I look for it in slave1 logs, I can see this line:
> "2014-01-08 02:14:25,206 INFO [Socket Reader #1 for port 38226] org.apache.hadoop.ipc.Server:
Starting Socket Reader #1 for port 38226"
> So there is a process on slave1 listening to this port, but slave2 tasks want to connect
to this port on slave2.
> 
> Do you know why is this happening?


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