# Dynamic setting discovery.zen.ping.unicast.hosts?

**URL:** <https://discuss.elastic.co/t/dynamic-setting-discovery-zen-ping-unicast-hosts/69017>\
**Category:** Elasticsearch\
**Created:** [December 14, 2016, 12:45pm UTC](https://discuss.elastic.co/t/dynamic-setting-discovery-zen-ping-unicast-hosts/69017 "2016-12-14T12:45:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![withccm](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@withccm](https://discuss.elastic.co/u/withccm)\
**Post date:** [December 14, 2016, 12:45pm UTC](https://discuss.elastic.co/t/dynamic-setting-discovery-zen-ping-unicast-hosts/69017/1 "2016-12-14T12:45:34Z")

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ES 5.0

How can I dynamic dynamic setting discovery.zen.ping.unicast.hosts?

```auto
curl -XPUT 'http://abcd:9200/_cluster/settings?pretty' -d '{
    "transient" : {
        "discovery.zen.ping.unicast.hosts" : ["abcd", "bcde", "cdef"]
    }
}'

```

I get the following:

```auto
{
  "error" : {
    "root_cause" : [
      {
        "type" : "remote_transport_exception",
        "reason" : "[es002][bcde:9300][cluster:admin/settings/update]"
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "transient setting [discovery.zen.ping.unicast.hosts.0], not dynamically updateable"
  },
  "status" : 400
}

```

[https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-update-settings.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-update-settings.html)

---

<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:** [January 11, 2017, 12:46pm UTC](https://discuss.elastic.co/t/dynamic-setting-discovery-zen-ping-unicast-hosts/69017/2 "2017-01-11T12:46:04Z")

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