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From Mark Miller <>
Subject Re: Solr 4.5 - Solr Cloud is creating new cores on random nodes
Date Thu, 19 Dec 2013 15:52:54 GMT
Sounds pretty weird. I would use 4.5.1. Don’t know that it will address this, but it’s
a very good idea.

This doesn’t sound like a feature to me. I’d file a JIRA issue if it seems like a real

Are you using the old style solr.xml with cores defined in it or the new core discovery mode
(cores are not defined in solr.xml)?

- Mark

On Dec 18, 2013, at 6:30 PM, Ryan Wilson <> wrote:

> Hello all,
> I am currently in the process of building out a solr cloud with solr 4.5 on
> 4 nodes with some pretty hefty hardware. When we create the collection we
> have a replication factor of 2 and store 2 replicas per node.
> While we have been experimenting, which has involved bringing nodes up and
> down as well as tanking them with OOM errors while messing with jvm
> settings, we have observed a disturbing trend where we will bring nodes
> back up and suddenly shard x has 6 replicas spread across the nodes. These
> replicas will have been created with no action on our part and we would
> much rather they not be created at all.
> I have not been able to determine whether this is a bug or a feature. If
> its a bug, I will happily provide what I can to track it down. If it is a
> feature, I would very much like to turn it off.
> Any Information is appreciated.
> Regards,
> Ryan Wilson

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