# How many Java clients do I need? **URL:** \ **Category:** Elasticsearch\ **Created:** [July 31, 2014, 4:48am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997 "2014-07-31T04:48:54Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Andrew\_Gaydenko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew_gaydenko/32/914_2.png) [@Andrew\_Gaydenko](https://discuss.elastic.co/u/Andrew_Gaydenko)\ **Post date:** [July 31, 2014, 4:48am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997/1 "2014-07-31T04:48:54Z")
As far as I understand, Java client instance is stateless, and it's methods are pure functions (I means "operating" methods rather those related to initial configuration just after instantiation). As a result, it is sufficient to have the only client for given cluster for given JVM. Is it true? Or - are there any benefits in, say, creating own client for every index? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/d38de8b6-6ed9-4e3f-9dfc-c9dedd1293d4%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d38de8b6-6ed9-4e3f-9dfc-c9dedd1293d4%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Andrew\_Gaydenko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew_gaydenko/32/914_2.png) [@Andrew\_Gaydenko](https://discuss.elastic.co/u/Andrew_Gaydenko)\ **Post date:** [July 31, 2014, 5:04am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997/2 "2014-07-31T05:04:54Z")
I must to add the question is related to transport client, rather client node. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/3267a8b5-f812-40f0-94bf-8258170ac75a%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/3267a8b5-f812-40f0-94bf-8258170ac75a%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [July 31, 2014, 6:18am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997/3 "2014-07-31T06:18:06Z")
Yeah. Only one client instance for the JVM. -- David 😉 Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 31 juil. 2014 à 06:48, Andrew Gaydenko [andrew.gaydenko@gmail.com](mailto:andrew.gaydenko@gmail.com) a écrit : ## As far as I understand, Java client instance is stateless, and it's methods are pure functions (I means "operating" methods rather those related to initial configuration just after instantiation). As a result, it is sufficient to have the only client for given cluster for given JVM. Is it true? Or - are there any benefits in, say, creating own client for every index? You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/d38de8b6-6ed9-4e3f-9dfc-c9dedd1293d4%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d38de8b6-6ed9-4e3f-9dfc-c9dedd1293d4%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/5476E2C7-7804-4732-BAD3-FC91A3408406%40pilato.fr](https://groups.google.com/d/msgid/elasticsearch/5476E2C7-7804-4732-BAD3-FC91A3408406%40pilato.fr). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Andrew\_Gaydenko](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/andrew_gaydenko/32/914_2.png) [@Andrew\_Gaydenko](https://discuss.elastic.co/u/Andrew_Gaydenko)\ **Post date:** [July 31, 2014, 6:23am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997/4 "2014-07-31T06:23:49Z")
On Thursday, July 31, 2014 10:18:52 AM UTC+4, David Pilato wrote: > Yeah. Only one client instance for the JVM. Now I'm happy to be sure, thanks! -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/700c7505-5480-4059-94a0-0e0cfc29890f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/700c7505-5480-4059-94a0-0e0cfc29890f%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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, 1:12am UTC](https://discuss.elastic.co/t/how-many-java-clients-do-i-need/18997/5 "2017-07-06T01:12:03Z")