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From Neha Narkhede <neha.narkh...@gmail.com>
Subject Re: Zookeeper freezes
Date Thu, 11 Oct 2012 15:42:24 GMT
Guy,

Connection reset messages are not particularly uncommon. Monitoring GC
and io on Zookeeper is necessary, like Jay mentions, however if you
are hitting any issues due to GC, you would see session expirations
and timeouts.
It will be helpful if you can send around the log4j files.

Thanks,
Neha

On Thu, Oct 11, 2012 at 8:39 AM, Jay Kreps <jay.kreps@gmail.com> wrote:
> Are you logging GC activity on the zk jvm? We had a lot of zk gc problems
> before we got more scientific about our jvm settings (I think we added some
> notes on the operations page).
>
> -Jay
>
> On Thu, Oct 11, 2012 at 7:48 AM, Guy Doulberg <guy.doulberg@conduit.com>wrote:
>
>> Hi guys,
>>
>> I am trying to understand a phenomena I am having in my cluster,
>>
>> My cluster consist of 3 zookeeprs (that are in the same machines as the
>> brokers)
>>
>> Sometimes the zookeeprs freezes, which means, I cann't use new consumers,
>> and I can't browse the znode using zookeeper browser.
>>
>> It disappears after a while, without doing anything pro-actively.
>>
>> A consumer that was already running is working alright - I guess since the
>> zookeeper are not available the consumer doesn't report offsets.
>>
>>
>> in my connection string I put all the 3 zookeeper instances.
>>
>>
>> Have it ever happened to one of you?
>>
>> Thanks,
>>
>> Guy Doulberg
>> Data Infrastructure engineer
>> Conduit
>>
>>
>>

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