Bulk index cannot split output batch any further

Graylog Central (peer support)
2

Hello,

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

Hope that helps