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From Otis Gospodnetic <>
Subject Re: Solr Hangs During Updates for over 10 minutes
Date Tue, 09 Jul 2013 23:23:39 GMT
Hi Jed,

This is really with Solr 4.0?  If so, it may be wiser to jump on 4.4
that is about to be released.  We did not have fun working with 4.0 in
SolrCloud mode a few months ago.  You will save time, hair, and money
if you convince your manager to let you use Solr 4.4. :)

Solr & ElasticSearch Support --
Performance Monitoring --

On Tue, Jul 9, 2013 at 4:44 PM, Jed Glazner <> wrote:
> Hi Shawn,
> I have been trying to duplicate this problem without success for the last 2 weeks which
is one reason I'm getting flustered.   It seems reasonable to be able to duplicate it but
I can't.
>  We do have a story to upgrade but that is still weeks if not months before that gets
rolled out to production.
> We have another cluster running the same version but with 8 shards and 8 replicas with
each shard at 100gb and more load and more indexing requests without this problem but we send
docs in batches here and all fields are stored.   Where as the trouble index has only 1 or
2 stored fields and only send docs 1 at a time.
> Could that have anything to do with it?
> Jed
> Von Samsung Mobile gesendet
> -------- Urspr√ľngliche Nachricht --------
> Von: Shawn Heisey <>
> Datum: 07.09.2013 18:33 (GMT+01:00)
> An:
> Betreff: Re: Solr Hangs During Updates for over 10 minutes
> On 7/9/2013 9:50 AM, Jed Glazner wrote:
>> I'll give you the high level before delving deep into setup etc. I have been struggeling
at work with a seemingly random problem when solr will hang for 10-15 minutes during updates.
 This outage always seems to immediately be proceeded by an EOF exception on  the replica.
 Then 10-15 minutes later we see an exception on the leader for a socket timeout to the replica.
 The leader will then tell the replica to recover which in most cases it does and then the
outage is over.
>> Here are the setup details:
>> We are currently using Solr 4.0.0 with an external ZK ensemble of 5 machines.
> After 4.0.0 was released, a *lot* of problems with SolrCloud surfaced
> and have since been fixed.  You're five releases and about nine months
> behind what's current.  My recommendation: Upgrade to 4.3.1, ensure your
> configuration is up to date with changes to the example config between
> 4.0.0 and 4.3.1, and reindex.  Ideally, you should set up a 4.0.0
> testbed, duplicate your current problem, and upgrade the testbed to see
> if the problem goes away.  A testbed will also give you practice for a
> smooth upgrade of your production system.
> Thanks,
> Shawn

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