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From Patrick Hunt <ph...@apache.org>
Subject Re: Zookeeper Disconnects repeatedly and often is unable to reconnect which expires session
Date Wed, 25 May 2011 17:21:04 GMT
Excellent suggestions from Ted, you should also take a look at the
troubleshooting guide on the wiki:

On Wed, May 25, 2011 at 10:17 AM, Ted Dunning <ted.dunning@gmail.com> wrote:
> That is a fairly short timeout.
> Generally, the first thing to check is garbage collection.  Try turning on
> GC logging.  You
> may want to adjust your GC settings to reduce the number and frequency of
> stop the world
> pauses.
> Secondly, check into the Zookeeper server to see if that machine is
> over-subscribed.  This
> can especially happen in virtualized environments like EC2 where a VM can go
> missing for
> several seconds at a time.
> Beyond that, you will need to describe your application and environment a
> bit more so that
> people can comment more intelligently.
> On Wed, May 25, 2011 at 9:54 AM, hiteshghia <hitesh.ghia@bunchball.com>wrote:
>> Hi,
>> Our Application does not use zookeeper heavily, but still I get a zookeeper
>> Disconnect event around 70 - 80 times a day and half the times its unable
>> to
>> reconnect which results in an expired session in which case I close the
>> zookeeper object and reconnect manually in the application code. tickTime =
>> 2000 and I use a timeout of 8000ms. What can be the reason of such frequent
>> disconnection event and how can I narrow down the reason and be sure that
>> the application code is not the culprit.
>> Your answers will be greatly appreciated.
>> Thanks
>> --
>> View this message in context:
>> http://zookeeper-user.578899.n2.nabble.com/Zookeeper-Disconnects-repeatedly-and-often-is-unable-to-reconnect-which-expires-session-tp6403581p6403581.html
>> Sent from the zookeeper-user mailing list archive at Nabble.com.

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