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From Josef Roehrl - PHEMI <jroe...@phemi.com>
Subject Re: Quick question re UnknownHostException
Date Fri, 13 Nov 2015 11:57:00 GMT
Hi Everyone,

Turns out that it was a DNS server issue exactly.  Had to get this
confirmed by the Data Centre, though.

Thanks!

On Fri, Nov 13, 2015 at 12:25 PM, Josef Roehrl - PHEMI <jroehrl@phemi.com>
wrote:

> Hi All,
>
> 3 times in the past few weeks (twice on 1 system, once on another), the
> master gets UnknownHostException (s), one by one, for each of the tablet
> servers.  Then, it wants to stop them. Eventually, all the tablet servers
> quit.
>
> It goes like this for all the tablet servers:
>
> 12 08:14:01,0498tserver:620
> ERROR
>
> error sending update to tserver3:9997: org.apache.thrift.transport.TTransportException:
java.net.UnknownHostException
>
> 12 09:01:53,0352master:12
> ERROR
>
> org.apache.thrift.transport.TTransportException: java.net.UnknownHostException
>
> 12 16:35:50,0672master:110
> ERROR
>
> unable to get tablet server status tserver3:9997[250e6cd2c500012] org.apache.thrift.transport.TTransportException:
java.net.UnknownHostException
>
>
>
> I've redacted the real host names, of course.
>
> This could be a DNS problem, though the system was running fine for days
> before this happened (same scenario on the 2 systems with really quite
> different DNS servers).
>
> If any one has a hint or seen something like this, I would appreciate any
> pointers.
>
> I have looked at the JIRA issues regarding DNS outages, but nothing seems
> to fit this pattern.
>
> Thanks
>
> --
>
>
> Josef Roehrl
> Senior Software Developer
> *PHEMI Systems*
> 180-887 Great Northern Way
> Vancouver, BC V5T 4T5
> 604-336-1119
> Website <http://www.phemi.com/> Twitter <https://twitter.com/PHEMISystems>
>  Linkedin
> <http://www.linkedin.com/company/3561810?trk=tyah&amp;trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>
>
>
>


-- 


Josef Roehrl
Senior Software Developer
*PHEMI Systems*
180-887 Great Northern Way
Vancouver, BC V5T 4T5
604-336-1119
Website <http://www.phemi.com/> Twitter <https://twitter.com/PHEMISystems>
Linkedin
<http://www.linkedin.com/company/3561810?trk=tyah&amp;trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>

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