# Replication on data nodes

**URL:** <https://discuss.elastic.co/t/replication-on-data-nodes/118301>\
**Category:** Elasticsearch\
**Created:** [February 3, 2018, 9:15am UTC](https://discuss.elastic.co/t/replication-on-data-nodes/118301 "2018-02-03T09:15:05Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![iam.Carrot](https://avatars.discourse-cdn.com/v4/letter/i/a9adbd/32.png) [@iam.Carrot](https://discuss.elastic.co/u/iam.Carrot)\
**Post date:** [February 3, 2018, 11:31am UTC](https://discuss.elastic.co/t/replication-on-data-nodes/118301/3 "2018-02-03T11:31:33Z")

</div>

@dadoonet It just seems off since it's never happened that ways. Also I get an error while querying a particular index. with the error illegal\_state\_exception. below is a link

> [@Illegal\_state\_exception with reason unexpected byte \[0xff\]](https://discuss.elastic.co/t/illegal-state-exception-with-reason-unexpected-byte-0xff/118310):
>
> Hi I am using elasticsearch to search through data. I get the below response: { "error": { "root\_cause": [{ "type": "illegal\_state\_exception", "reason": "unexpected byte [0xff]" } ], "type": "search\_phase\_execution\_exception", "reason": "all shards failed", "phase": "query", "grouped": true, "failed\_shards": [ { "shard": 0, "index": "locationdb\_160", "n…

---

_[View the full topic](https://discuss.elastic.co/t/replication-on-data-nodes/118301)._