# Bulk index cannot split output batch any further

**URL:** <https://community.graylog.org/t/bulk-index-cannot-split-output-batch-any-further/20386>\
**Category:** Graylog Central (peer support)\
**Created:** [July 2, 2021, 1:34pm UTC](https://community.graylog.org/t/bulk-index-cannot-split-output-batch-any-further/20386 "2021-07-02T13:34:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![gsmith](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/gsmith/32/1222_2.png) [@gsmith](https://community.graylog.org/u/gsmith)\
**Post date:** [July 2, 2021, 9:38pm UTC](https://community.graylog.org/t/bulk-index-cannot-split-output-batch-any-further/20386/2 "2021-07-02T21:38:09Z")

</div>

Hello,

> [@jonata.oliveira](#):
>
> ERROR [BlockingBatchedESOutput] Unable to flush message buffer

Have you check the health on Elasticsearch? There are a couple of commands you can use.

**ES Health Check**  
`curl -XGET http://localhost:9200/_cluster/health?pretty=true`

**Check Shards**  
`curl -XGET http://localhost:9200/_cat/shards`

**ES Shard Info**  
`curl -XGET http://localhost:9200/_cluster/allocation/explain?pretty`

Here are a similar issue, maybe something in there might help

> [@BlockingBatchedESOutput Error](https://community.graylog.org/t/blockingbatchedesoutput-error/3245):
>
> Running ES 5.6.1 2017-11-21T16:01:25.902Z ERROR [BlockingBatchedESOutput] Unable to flush message buffer java.lang.ClassCastException: Cannot cast java.lang.String to org.joda.time.DateTime at java.lang.Class.cast(Class.java:3369) ~[?:1.8.0\_111] at org.graylog2.plugin.Message.getFieldAs(Message.java:384) ~[graylog.jar:?] at org.graylog2.plugin.Message.getTimestamp(Message.java:189) ~[graylog.jar:?] at org.graylog2.indexer.messages.Messages.propagateFailure(Messag…

> [@JSON Extractor Problem 2](https://community.graylog.org/t/json-extractor-problem-2/3150/7):
>
> Well. I just renamed timestamp field from JSON and have got next error: ERROR [Messages] Failed to index [3] messages. Please check the index error log in your web interface for the reason. Error: One or more of the items in the Bulk request failed, check BulkResult.getItems() for more information. {"type":"mapper\_parsing\_exception","reason":"failed to parse [level]","caused\_by":{"type":"number\_format\_exception","reason":"For input string: \"INFO\""}}

Hope that helps

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