# Call when shard reallocation occurs **URL:** \ **Category:** Elasticsearch\ **Created:** [August 21, 2014, 5:02pm UTC](https://discuss.elastic.co/t/call-when-shard-reallocation-occurs/19395 "2014-08-21T17:02:19Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ElasticSearch\_Users\_](https://avatars.discourse-cdn.com/v4/letter/e/b4bc9f/32.png) [@ElasticSearch\_Users\_](https://discuss.elastic.co/u/ElasticSearch_Users_)\ **Post date:** [August 21, 2014, 5:02pm UTC](https://discuss.elastic.co/t/call-when-shard-reallocation-occurs/19395/1 "2014-08-21T17:02:19Z")
Hi, Is it possible to have my custom callback function defined and invoked by ES whenever it moves a shard from one node to another? Thanks, Sandeep -- 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/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\ **Post date:** [August 22, 2014, 12:49am UTC](https://discuss.elastic.co/t/call-when-shard-reallocation-occurs/19395/2 "2014-08-22T00:49:45Z")
AFAIK, there is no way to achieve such functionality. The only way I have figured out have similar functionality is to write a plugin with a cluster state listener and have the plugin reach out to some external service. Cheers, Ivan On Thu, Aug 21, 2014 at 10:02 AM, 'Sandeep Ramesh Khanzode' via elasticsearch [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) wrote: > Hi, > > Is it possible to have my custom callback function defined and invoked by > ES whenever it moves a shard from one node to another? > > Thanks, > Sandeep > > -- > 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/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com?utm_medium=email&utm_source=footer) > . > 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/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Sandeep\_Ramesh\_Khanz](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@Sandeep\_Ramesh\_Khanz](https://discuss.elastic.co/u/Sandeep_Ramesh_Khanz)\ **Post date:** [August 22, 2014, 7:10am UTC](https://discuss.elastic.co/t/call-when-shard-reallocation-occurs/19395/3 "2014-08-22T07:10:15Z")
Thanks, Ivan. Appreciate it. I will take a look at 'ClusterStateListener'. Meanwhile, if you have any ready reference available for this, like doc or example code, please share. Thanks! On Fri, Aug 22, 2014 at 6:19 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote: > AFAIK, there is no way to achieve such functionality. > > The only way I have figured out have similar functionality is to write a > plugin with a cluster state listener and have the plugin reach out to some > external service. > > Cheers, > > Ivan > > On Thu, Aug 21, 2014 at 10:02 AM, 'Sandeep Ramesh Khanzode' via > elasticsearch [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com) wrote: > > > Hi, > > > > Is it possible to have my custom callback function defined and invoked by > > ES whenever it moves a shard from one node to another? > > > > Thanks, > > Sandeep > > > > -- > > 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/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/9b792e04-8bd1-4006-93a2-f3d736cd8474%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > 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 a topic in the > Google Groups "elasticsearch" group. > To unsubscribe from this topic, visit > [https://groups.google.com/d/topic/elasticsearch/4fEahX9nhL0/unsubscribe](https://groups.google.com/d/topic/elasticsearch/4fEahX9nhL0/unsubscribe). > To unsubscribe from this group and all its topics, 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/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com) > [https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDMCNNsvAv2r0bRsog6a2oow9bYSyQ-CZtcxtcgkUJtRQ%40mail.gmail.com?utm_medium=email&utm_source=footer) > . > > 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/CAKnM90a-CrxeUm4F4q889naxhcwNLrhYoZnsptQYZhi7gHL9pQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKnM90a-CrxeUm4F4q889naxhcwNLrhYoZnsptQYZhi7gHL9pQ%40mail.gmail.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, 1:07am UTC](https://discuss.elastic.co/t/call-when-shard-reallocation-occurs/19395/4 "2017-07-06T01:07:03Z")