[
https://issues.apache.org/jira/browse/SOLR-9290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15375548#comment-15375548
]
Shai Erera commented on SOLR-9290:
----------------------------------
Thanks [~shalinmangar]. Few questions:
bq. Also, I think the reason this wasn't reproducible on master is because
SOLR-4509 enabled eviction of idle threads by calling
HttpClientBuilder#evictIdleConnections with a 50 second limit.
Is this something we can apply to 5x/6x too?
bq. This patch adds a monitor thread for the pool created in UpdateShardHandler
and with this applied
I didn't see the monitor in the latest patch, only the log printouts. Did you
forget to add it?
bq. There are still a few connections in CLOSE_WAIT at steady state but I
verified that they belong to a different HttpClient instance in
HttpShardHandlerFactory and other places.
(1) Can/Should we have a similar monitor for HttpShardHandlerFactory?
(2) Any reason why the two don't share the same HttpClient instance?
bq. This patch applies on 5.3.2
bq. We have a large limit for maxConnections and maxConnectionsPerHost
I thought that hypothesis holds only after SOLR-8533. Are you saying you also
saw it on 5.3.2? If so, what are the values that are set for these properties
there? We definitely *do not* see the problem with 5.4.1, but we didn't test
prior versions.
> 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, 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
