ELASTIC SEARCH->SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures

Hi All,

           I was trying to make the global search work for my crm version 7.7x

when i click on the test in the crm admin->search i get a popup like 'do system indexing'.

I have set up a cron for every five minutes and done indexing

The thing is i am unable to figure out if the

1.indexing is done or not.

2.i am getting SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures

Elastic search is not returning any records in the global search and when i click on the full search icon on global search i get the SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures.

I am in very bad need to fix this and any help would make my day. Tevfik Tümer Lori Arce 

Regards

Sidhu