[
https://issues.apache.org/jira/browse/SOLR-9290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15375082#comment-15375082
]
Shai Erera commented on SOLR-9290:
----------------------------------
An update -- I've modified our solr.xml (which is basically the vanilla
solr.xml) with these added props (under the {{solrcloud}} element) and I do not
see the connections spike anymore:
{noformat}
<int name="maxUpdateConnections">10000</int>
<int name="maxUpdateConnectionsPerHost">100</int>
{noformat}
Those changes were part of SOLR-8533. [~markrmil...@gmail.com] on that issue
you didn't explain why the defaults need to be set that high. Was there perhaps
an email thread you can link to which includes more details? I ask because one
thing I've noticed is that if I query {{solr/admin/info/system}}, the
{{system.openFileDescriptorCount}} is very high when there are many
CLOSE_WAITs. Such a change in Solr default probably need to be accompanied by
an OS-level setting too, no?
I am still running tests with those props set in solr.xml, on top of 5.5.1.
[~mbjorgan] would you mind testing in your environment too?
[~hoss...@fucit.org], sorry I completely missed your questions. Our solr.xml is
the vanilla one, we didn't modify anything in it. We did uncomment the SSL
props in solr.in.sh as the ref guide says, but aside from the key name and
password, we didn't change any settings.
> TCP-connections in CLOSE_WAIT spikes during heavy indexing when SSL is enabled
> ------------------------------------------------------------------------------
>
> Key: SOLR-9290
> URL: https://issues.apache.org/jira/browse/SOLR-9290
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 5.5.1, 5.5.2
> Reporter: Anshum Gupta
> Priority: Critical
> Attachments: SOLR-9290-debug.patch, setup-solr.sh
>
>
> Heavy indexing on Solr with SSL leads to a lot of connections in CLOSE_WAIT
> state.
> At my workplace, we have seen this issue only with 5.5.1 and could not
> reproduce it with 5.4.1 but from my conversation with Shalin, he knows of
> users with 5.3.1 running into this issue too.
> Here's an excerpt from the email [~shaie] sent to the mailing list (about
> what we see:
> {quote}
> 1) It consistently reproduces on 5.5.1, but *does not* reproduce on 5.4.1
> 2) It does not reproduce when SSL is disabled
> 3) Restarting the Solr process (sometimes both need to be restarted), the
> count drops to 0, but if indexing continues, they climb up again
> When it does happen, Solr seems stuck. The leader cannot talk to the
> replica, or vice versa, the replica is usually put in DOWN state and
> there's no way to fix it besides restarting the JVM.
> {quote}
> Here's the mail thread:
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201607.mbox/%3c46cc66220a8143dc903fa34e79205...@vp-exc01.dips.local%3E
> Creating this issue so we could track this and have more people comment on
> what they see.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
