On 9/18/2019 6:11 AM, Shawn Heisey wrote:
On 9/17/2019 9:35 PM, Hongxu Ma wrote:
My questions:
* Is this error possible caused by "long gc pause"? my solr
zkClientTimeout=60000
It's possible. I can't say for sure that this is the issue, but it
might be.
A followup. I was thinking about the interactions here. It looks like
Solr only waits four seconds for the leader election, and both of the
pauses you mentioned are longer than that.
Four seconds is probably too short a time to wait, and I do not think
that timeout is configurable anywhere.
What version of Solr do you have, and what is your max heap? The CMS
garbage collection that Solr 5.0 and later incorporate by default is
pretty good. My G1 settings might do slightly better, but the
improvement won't be dramatic unless your existing commandline has
absolutely no gc tuning at all.
That question will be important. If you already have our CMS GC tuning,
switching to G1 probably is not going to solve this. Lowering the max
heap might be the only viable solution in that case, and depending on
what you're dealing with, it will either be impossible or it will
require more servers.
Thanks,
Shawn
