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From "Erick Erickson (JIRA)" <>
Subject [jira] [Commented] (SOLR-9311) solrcloud so many connections
Date Mon, 31 Oct 2016 15:50:58 GMT


Erick Erickson commented on SOLR-9311:


Ran across this kind of at random. I know there have been a number of improvements in this
area in the 5.5.3 and 6.2 time-frames, with at least one additional improvement coming in
the 6.3 (soon to be released) time frame.

At any rate, there is very little chance that any fixes would be back-ported to 4.x as development
has long been stopped on that branch.

So what do you think about closing this ticket?


> solrcloud so many connections
> -----------------------------
>                 Key: SOLR-9311
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: clients - java
>    Affects Versions: 4.9
>            Reporter: Junfeng Mu
>         Attachments: CPU.png, connections.png, shards.png
> firstly, I do not know wether it is a bug or a wrong usage. if this is a wrong usage,
I will opligize to disturb you, and tell me what the wrong usage is.
> We are using Solrj 4.9.1 to connect to a Zookeeper. and the solr server version is 4.9.0
We are currently using CloudSolrServer as a singleton to operate index data, and I believe
that solrj to zookeeper is a TCP connection, and zookeeper to solrcloud internal is actually
a httpconnection.
> we use the zabbix to monitor the solrcloud status, and we deploy solr in Wildfly(JBOSS),
for example the http port is 8180, we find the number that connecting with solr on port 8180
is so high. for now  we find the number can be around 4000, that is too large.and we find
that with the increasing connections, the query speed become slow. the CPU of the solr sever
is unstable, and the speed to commit new index data becomes slow as well.
> besides, the JDK version is 1.7.25 to running solr server.
> on the other hand, we have 3 cores with 5 shards, and each shard with one leader and
one replication. now the data account goes to be 100 million, and it is still growing up.
> please see the screenshot of Zabbix in the attachments.
> please help me, and looking forward to your reply.
> Thanks.
> Kent

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