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https://issues.apache.org/jira/browse/SOLR-9290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15375582#comment-15375582
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Shai Erera commented on SOLR-9290:
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Regarding the patch, the monitor looks good. Few comments:
* I prefer that we name it {{IdleConnectionsMonitor}} (w/ 's', plural
connections). It goes for the class, field and thread name.
* Do you intend to keep all the log statements around?
* Do you think we should make the polling interval (10s) and
idle-connections-time (50s) configurable? Perhaps through system properties?
> 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/%[email protected]%3E
> Creating this issue so we could track this and have more people comment on
> what they see.
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