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From Eelco Lempsink <lemps...@paragin.nl>
Subject Re: non responding tasks (solved)
Date Mon, 23 Apr 2007 14:36:51 GMT
On 23-apr-2007, at 12:14, Mathijs Homminga wrote:
> I have had some troubles with 2 nodes on one of our clusters.
> While most nodes finished their map tasks successfully in about 2  
> secs, two were not responding well. On their Task Trackers the task  
> status remained UNASSIGNED for a couple of minutes (and the Job  
> Tracker receives no heartbeats) and then changed to RUNNING but in  
> the end the task got killed after 600 secs because no status update  
> had been received.
> I found out that this was caused by the fact that we had not  
> installed the loopback interface correctly on these two nodes. So,  
> although all machines could connect to each other, two of them  
> could not connect to themselves.

Could you explain how you installed your loopback device now?  I ran  
into a similar (maybe the same) problem, where I could only reach the  
_local_ tasktracker by poking a hole in my firewall.

> Btw, could I have seen this in any of the logs?

I don't think so, it just times out.


Eelco Lempsink

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