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From "Davis, Daniel (NIH/NLM) [C]" <>
Subject RE: SolrCloud installation troubles...
Date Mon, 29 Jan 2018 21:10:54 GMT
Trying could help.   We kind of tend to think localhost is always, but
I've seen localhost start to resolve to ::1, the IPv6 equivalent of

I guess some environments can be strict enough to restrict communication on localhost; seems
hard to imagine, but it does happen.

-----Original Message-----
From: Scott Prentice [] 
Sent: Monday, January 29, 2018 4:02 PM
Subject: Re: SolrCloud installation troubles...

On 1/29/18 12:44 PM, Shawn Heisey wrote:
> On 1/29/2018 1:13 PM, Scott Prentice wrote:
>> But when I do the same thing on the Red Hat system it fails. Through 
>> the UI, it'll first time out with this message ..
>>     Connection to Solr lost
>> Then after a refresh, the collection appears to have been partially 
>> created, but it's in the "Gone" state, and after some time, is 
>> deleted by an apparent cleanup process. If I try to create one 
>> through the command line ..
>>     ./bin/solr create -c test99 -n _default -s 2 -rf 2
>> I get this response ..
>> ERROR: Failed to create collection 'test99' due to: 
>> {
>> on:IOException occured when talking to server at: 
>> n:IOException occured when talking to server at: 
>> n:IOException occured when talking to server at: 
> This sounds like either network connectivity problems or possibly 
> issues caused by extreme garbage collection pauses that result in 
> timeouts.
> Thanks,
> Shawn
Thanks, Shawn. I was wondering if there was something going on with IP redirection that was
causing confusion. Any thoughts on how to debug? 
And, what do you mean by "extreme garbage collection pauses"? Is that Solr garbage collection
or the OS itself? There's really nothing happening on this machine, it's purely for testing
so there shouldn't be any extra load from other processes.


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