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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Java version 11 for solr 7.5?
Date Wed, 26 Sep 2018 20:03:57 GMT
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Jeff,

On 9/26/18 11:35, Jeff Courtade wrote:
> My concern with using g1 is solely based on finding this. Does
> anyone have any information on this?
> 
> https://wiki.apache.org/lucene-java/JavaBugs#Oracle_Java_.2F_Sun_Java_
.2F_OpenJDK_Bugs
>
>  "Do not, under any circumstances, run Lucene with the G1 garbage
> collector. Lucene's test suite fails with the G1 garbage collector
> on a regular basis, including bugs that cause index corruption.
> There is no person on this planet that seems to understand such
> bugs (see https://bugs.openjdk.java.net/browse/JDK-8038348, open
> for over a year), so don't count on the situation changing soon.
> This information is not out of date, and don't think that the next
> oracle java release will fix the situation."

That language is 3 years old and likely just hasn't been updated after
it was no longer relevant. Also, it isn't attributed to anyone in
particular (it's anonymous), so ... maybe it was one person's opinion
and not a project-initiated warning.

- -chris

> On Wed, Sep 26, 2018 at 11:08 AM Walter Underwood
> <wunder@wunderwood.org> wrote:
> 
>> We’ve been running G1 in prod for at least 18 months. Our biggest
>> cluster is 48 machines, each with 36 CPUs, running 6.6.2. We also
>> run it on our 4.10.4 master/slave cluster.
>> 
>> wunder Walter Underwood wunder@wunderwood.org 
>> http://observer.wunderwood.org/  (my blog)
>> 
>>> On Sep 26, 2018, at 7:37 AM, Jeff Courtade
>>> <courtadejeff@gmail.com>
>> wrote:
>>> 
>>> Thanks for that... I am just starting to look at this I was
>>> unaware of the license debacle.
>>> 
>>> Automated testing up to 10 is great.
>>> 
>>> I am still curious about the GC1 being supported now...
>>> 
>>> On Wed, Sep 26, 2018 at 10:25 AM Zisis T. <zistach@runbox.com>
>>> wrote:
>>> 
>>>> Jeff Courtade wrote
>>>>> Can we use GC1 garbage collection yet or do we still need
>>>>> to use CMS?
>>>> 
>>>> I believe you should be safe to go with G1. We've applied it
>>>> in in a
>> Solr
>>>> 6.6 cluster with 10 shards, 3 replicas per shard and an index
>>>> of about 500GB (1,5T counting all replicas) and it works
>>>> extremely well (throughput > 99%). The use-case includes
>>>> complex search queries and faceting. There is also this post
>>>> you can use as a starting point
>>>> 
>>>> 
>> http://blog.cloudera.com/blog/2017/06/apache-solr-memory-tuning-for-p
roduction/
>>>>
>>>>
>>>>
>>>>
>>>>
>> 
- --
>>>> Sent from:
>>>> http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
>>>> 
>>> --
>>> 
>>> Jeff Courtade M: 240.507.6116 <(240)%20507-6116>
>> 
>> --
> 
> Jeff Courtade M: 240.507.6116
> 
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