# Hooks for knowing when topology has changed **URL:** \ **Category:** Elasticsearch\ **Created:** [August 15, 2014, 12:42pm UTC](https://discuss.elastic.co/t/hooks-for-knowing-when-topology-has-changed/19302 "2014-08-15T12:42:37Z")\ **Posts on this page:** 2\ **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 15, 2014, 12:42pm UTC](https://discuss.elastic.co/t/hooks-for-knowing-when-topology-has-changed/19302/1 "2014-08-15T12:42:37Z")
how to know when a shard has moved or a new node is added in elasticsearch. is there any plugin/hook in java to do so? -- 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/8661cc3a-8261-4fa6-adc3-aca59eadc6e7%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/8661cc3a-8261-4fa6-adc3-aca59eadc6e7%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, 1:08am UTC](https://discuss.elastic.co/t/hooks-for-knowing-when-topology-has-changed/19302/2 "2017-07-06T01:08:17Z")