# ElasticSearch Java Client and OffestDateTime

**URL:** <https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322>\
**Category:** Elasticsearch\
**Created:** [May 9, 2019, 9:42am UTC](https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322 "2019-05-09T09:42:01Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mdoh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mdoh/32/45882_2.png) [@mdoh](https://discuss.elastic.co/u/mdoh)\
**Post date:** [May 9, 2019, 9:42am UTC](https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322/1 "2019-05-09T09:42:01Z")

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Hi,

I updated my elasticsearch java client from 6.2.4 to 6.4. Now I got an exception

```
Exception in thread "main" java.lang.IllegalArgumentException: cannot write xcontent for unknown value of type class java.time.OffsetDateTime
at org.elasticsearch.common.xcontent.XContentBuilder.unknownValue(XContentBuilder.java:755)
at org.elasticsearch.common.xcontent.XContentBuilder.value(XContentBuilder.java:726)
at org.elasticsearch.common.xcontent.XContentBuilder.field(XContentBuilder.java:711)

```

Is there a way to register OffsetTimeDeserializer or am I doing something completely wrong.

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<div class="post-metadata">

**Author:** ![spinscale](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/spinscale/32/25011_2.png) [@spinscale](https://discuss.elastic.co/u/spinscale)\
**Post date:** [May 9, 2019, 10:06am UTC](https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322/2 "2019-05-09T10:06:06Z")

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Which 6.4 version are you using exactly? I remember a fix around that in 6.4.1, see [https://github.com/elastic/elasticsearch/pull/33120/files](https://github.com/elastic/elasticsearch/pull/33120/files)

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<div class="post-metadata">

**Author:** ![mdoh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mdoh/32/45882_2.png) [@mdoh](https://discuss.elastic.co/u/mdoh)\
**Post date:** [May 9, 2019, 11:07am UTC](https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322/3 "2019-05-09T11:07:20Z")

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I was using 6.4.0, a minor version bump fixed it. Thanks

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<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:** [June 6, 2019, 11:07am UTC](https://discuss.elastic.co/t/elasticsearch-java-client-and-offestdatetime/180322/4 "2019-06-06T11:07:22Z")

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