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MapReduce >> mail # user >> Why none AppMaster node seeks IPCServer on itself.

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Re: Why none AppMaster node seeks IPCServer on itself.
Checked the firewall rules?


On Jan 8, 2014, at 3:22 AM, Saeed Adel Mehraban <[EMAIL PROTECTED]> 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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