# Node connected to himself

**URL:** <https://discuss.elastic.co/t/node-connected-to-himself/10997>\
**Category:** Elasticsearch\
**Created:** [March 4, 2013, 1:33pm UTC](https://discuss.elastic.co/t/node-connected-to-himself/10997 "2013-03-04T13:33:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Filirom1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/filirom1/32/2234_2.png) [@Filirom1](https://discuss.elastic.co/u/Filirom1)\
**Post date:** [March 4, 2013, 1:33pm UTC](https://discuss.elastic.co/t/node-connected-to-himself/10997/1 "2013-03-04T13:33:44Z")

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Hi,

In my cluster I have 4 nodes.  
In elasticsearch.yml I use unicast.hosts with my 4 nodes specified.

When I execute lsof, I see that every node is connected to himself.

[nodeA] $ lsof -i|grep -- '-\>nodeA' |grep java  
java 24998 www 246u IPv6 37329657 0t0 TCP  
nodeA:39097-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 247u IPv6 37329658 0t0 TCP  
nodeA:39098-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 248u IPv6 37329659 0t0 TCP  
nodeA:9027-\>nodeA:39097 (ESTABLISHED)  
java 24998 www 249u IPv6 37329660 0t0 TCP  
nodeA:39099-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 250u IPv6 37329661 0t0 TCP  
nodeA:9027-\>nodeA:39098 (ESTABLISHED)  
java 24998 www 251u IPv6 37329662 0t0 TCP  
nodeA:39100-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 252u IPv6 37329663 0t0 TCP  
nodeA:9027-\>nodeA:39099 (ESTABLISHED)  
java 24998 www 253u IPv6 37329664 0t0 TCP  
nodeA:39101-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 254u IPv6 37329665 0t0 TCP  
nodeA:9027-\>nodeA:39100 (ESTABLISHED)  
java 24998 www 255u IPv6 37329666 0t0 TCP  
nodeA:9027-\>nodeA:39101 (ESTABLISHED)  
java 24998 www 256u IPv6 37329667 0t0 TCP  
nodeA:39102-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 257u IPv6 37329668 0t0 TCP  
nodeA:9027-\>nodeA:39102 (ESTABLISHED)  
java 24998 www 258u IPv6 37329669 0t0 TCP  
nodeA:39103-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 259u IPv6 37329670 0t0 TCP  
nodeA:9027-\>nodeA:39103 (ESTABLISHED)  
java 24998 www 260u IPv6 37329671 0t0 TCP  
nodeA:39104-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 261u IPv6 37329673 0t0 TCP  
nodeA:9027-\>nodeA:39104 (ESTABLISHED)  
java 24998 www 262u IPv6 37329674 0t0 TCP  
nodeA:39105-\>nodeA:9027 (ESTABLISHED)  
java 24998 www 263u IPv6 37329675 0t0 TCP  
nodeA:9027-\>nodeA:39105 (ESTABLISHED)

Is it usual ?  
Should I remove the local node in the unicast.hosts configuration ?

Cheers  
Romain

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 2:48am UTC](https://discuss.elastic.co/t/node-connected-to-himself/10997/2 "2017-07-06T02:48:36Z")

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