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Shai Erera commented on SOLR-9290: ---------------------------------- Thanks [~yo...@apache.org], I'll read the issue. I agree with what you write in general, but we do hit an issue with these settings. That that it reproduces easily with SSL enabled suggests that the issue may not be in Solr code at all, but I wonder if we shouldn't perhaps pick smaller default values if SSL is enabled? (Our guess at the moment is that HC keeps more connections in the pool when SSL is enabled because they are more expensive to initiate, but it's just a guess). And maybe the proper solution would be what [~shalinmangar] wrote above -- have a bg monitor which closes idle/expired connections. I actually wonder why it can't be a property of {{ClientConnectionManager}} that you can set to auto close idle/expired connections after a period of time. We can potentially have that monitor act only if SSL is enabled (or at least until non-SSL exhibits the same problems too). > 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