Accidental force merge

Hi,

I executed force merge and forgot to add index name which I want to merge...
Now the task is ongoing for some time and it has description:

 "Force-merge indices [], maxSegments[4], onlyExpungeDeletes[false], flush[true]"

Does it mean it tries to force merge all indices present in the cluster or what?
I wanted to stop it, but it is not possible...
What can I do in this case? it eats all the ram and I am afraid of nodes failure when it will be ongoing forever.

Welcome to our community! :smiley:

The only way to stop a force merge is to do an entire cluster restart. Otherwise you will have to wait for it to complete.