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Elasticsearch producing tons of empty log entries.


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There are no errors in the elasticsearch log, the elasticsearch instance has status "green", querying /content/_search from commandline works flawless. I don't see any reason why the IPB instance should not be able to talk to the local elasticsearch instance. If I do a tcpdump I can see tons of these querys:
 

{"query":{"bool":{"must":[],"must_not":[],"filter":[{"bool":{"should":[{"terms":{"index_class":["IPS\\core\\Statuses\\Status","IPS\\core\\Statuses\\Reply"]}},{"terms":{"index_class":["IPS\\forums\\Topic\\Post"]}},{"terms":{"index_class":["IPS\\calendar\\Event","IPS\\calendar\\Event\\Comment","IPS\\calendar\\Event\\Review"]}},{"terms":{"index_class":["IPS\\nexus\\Package\\Item","IPS\\nexus\\Package\\Review"]}},{"terms":{"index_class":["IPS\\cms\\Pages\\PageItem"]}},{"terms":{"index_class":["IPS\\cms\\Records1","IPS\\cms\\Records\\Comment1","IPS\\cms\\Records\\Review1"]}},{"terms":{"index_class":["IPS\\communitymap\\Markers","IPS\\communitymap\\Markers\\Comment","IPS\\communitymap\\Markers\\Review"]}}]}},{"match_none":{}},{"range":{"index_date_created":{"gt":0}}},{"terms":{"index_permissions":[3,"m96298","*"]}},{"term":{"index_hidden":0}}]}},"sort":[{"index_date_created":"desc"}],"from":0,"size":11}

with an answer of HTTP/1.1 200 OK and a body of

{"took":0,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":0,"relation":"eq"},"max_score":null,"hits":[]}}

so the elasticsearch instance is clearly working.

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As far as I can see, the errors are mostly from the stream subscription task(s):

#0 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Http/Request/Curl.php(422): IPS\Http\Request\_Curl->_execute()
#1 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Http/Request/Curl.php(298): IPS\Http\Request\_Curl->_executeAndFollowRedirects()
#2 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Content/Search/Elastic/Query.php(1235): IPS\Http\Request\_Curl->get()
#3 /srv/www/sites/www.germanscooterforum.de/htdocs/applications/core/sources/Stream/Subscription.php(145): IPS\Content\Search\Elastic\_Query->search()
#4 /srv/www/sites/www.germanscooterforum.de/htdocs/applications/core/sources/Stream/Subscription.php(90): IPS\core\Stream\_Subscription->getContentForStream()
#5 /srv/www/sites/www.germanscooterforum.de/htdocs/applications/core/tasks/weeklyStreamSubscriptions.php(40): IPS\core\Stream\_Subscription::sendBatch()
#6 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Task/Task.php(367): IPS\core\tasks\_weeklyStreamSubscriptions->IPS\core\tasks\{closure}()
#7 /srv/www/sites/www.germanscooterforum.de/htdocs/applications/core/tasks/weeklyStreamSubscriptions.php(41): IPS\_Task->runUntilTimeout()
#8 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Task/Task.php(266): IPS\core\tasks\_weeklyStreamSubscriptions->execute()
#9 /srv/www/sites/www.germanscooterforum.de/htdocs/system/Task/Task.php(229): IPS\_Task->run()
#10 /srv/www/sites/www.germanscooterforum.de/htdocs/applications/core/interface/task/task.php(58): IPS\_Task->runAndLog()
#11 {main}

 

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It seems like something is opening nearly 30.000 connections to the elasticsearch backend without reusing existing connections (leaving a lot of connections in TIME_WAIT), peaking at around 500req/s. The querys all look like

POST /content/_search HTTP/1.1
Host: 127.0.0.1:9200
User-Agent: Invision Community 4
Accept: */*
Content-Type: application/json
Content-Length: 910

{"query":{"bool":{"must":[],"must_not":[],"filter":[{"bool":{"should":[{"terms":{"index_class":["IPS\\core\\Statuses\\Status","IPS\\co
re\\Statuses\\Reply"]}},{"terms":{"index_class":["IPS\\forums\\Topic\\Post"]}},{"terms":{"index_class":["IPS\\calendar\\Event","IPS\\c
alendar\\Event\\Comment","IPS\\calendar\\Event\\Review"]}},{"terms":{"index_class":["IPS\\nexus\\Package\\Item","IPS\\nexus\\Package\\
Review"]}},{"terms":{"index_class":["IPS\\cms\\Pages\\PageItem"]}},{"terms":{"index_class":["IPS\\cms\\Records1","IPS\\cms\\Records\\C
omment1","IPS\\cms\\Records\\Review1"]}},{"terms":{"index_class":["IPS\\communitymap\\Markers","IPS\\communitymap\\Markers\\Comment","
IPS\\communitymap\\Markers\\Review"]}}]}},{"match_none":{}},{"range":{"index_date_created":{"gt":0}}},{"terms":{"index_permissions":[3
,"m96298","*"]}},{"term":{"index_hidden":0}}]}},"sort":[{"index_date_created":"desc"}],"from":0,"size":11}

In the same interval, mysql is peaking at 1400qps.

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