There is no response of _forcemerge api

I use delete by query plugin to delete docs,and then want to use forcemerge api to release the disk space.

Here are my index stats response.curl localhost:9200/ota-frontloglist-2016-06-21/_stats

 "docs": {
            "count": 114648,
            "deleted": 5311
  "merges": {
            "current": 0,
            "current_docs": 0,
            "current_size_in_bytes": 0,
            "total": 0,
            "total_time_in_millis": 0,
            "total_docs": 0,
            "total_size_in_bytes": 0,
            "total_stopped_time_in_millis": 0,
            "total_throttled_time_in_millis": 0,
            "total_auto_throttle_in_bytes": 125829120

Here is my force merge command curl -XPOST 'http://localhost:9200/ota-frontloglist-2016-06-21/_forcemerge?only_expunge_deletes=true'

I waited a long time, but the index stats has no change.

my elasticsearch's version V2.3.1
Thank you!

Hi @famoss,

how long did you wait? Did the curl with the force merge succeed? What was the HTTP status code? Also: Did you look at the Elasticsearch logs (i.e. what Elasticsearch did during this time)?