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From Xuan Gong <xg...@hortonworks.com>
Subject Re: App Master issue.
Date Wed, 05 Mar 2014 19:33:56 GMT
The message means it can not connect to ResourceManager.
Could you share your configuration ? It might be easier to figure out the
real issue.


Xuan Gong

On Wed, Mar 5, 2014 at 11:29 AM, Sai Prasanna <ansaiprasanna@gmail.com>wrote:

> Hi,
> I have a five node cluster. One master and 4 slaves. Infact master also
> has a data node running. When ever app master is launched in the master
> node, simple wordcount program runs fine. But if it is launched in some
> slave nodes, the progress of the application gets hung.
> The problem is, though i have set the yarn.resourcemanager.hostname to the
> ip-address of the master, the slave connects only to the default,
> What could be the reason ???
> I get the following message in the logs of app.master in web-UI.
> *"...Configuration: job.xml:an attempt to override final parameter:
> mapreduce.job.end-notification.max.retry.interval;  Ignoring.*
> *2014-03-05 20:15:50,597 WARN [main] org.apache.hadoop.conf.Configuration:
> job.xml:an attempt to override final parameter:
> mapreduce.job.end-notification.max.attempts;  Ignoring. 2014-03-05
> 20:15:50,603 INFO [main] org.apache.hadoop.yarn.client.RMProxy: Connecting
> to ResourceManager at / <>2014-03-05
> 20:15:56,632 INFO [main] org.apache.hadoop.ipc.Client: Retrying connect to
> server: <>. Already tried 0
> time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10,
> sleepTime=1000 MILLISECONDS)"*
> --
> *Sai Prasanna. AN*
> *II M.Tech (CS), SSSIHL*
> *Entire water in the ocean can never sink a ship, Unless it gets inside.
> All the pressures of life can never hurt you, Unless you let them in.*

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