We are running ElasticSearch 1.4.5 (CentOS 6/Java 7) and have run into an issue twice with too many open files on our staging cluster (limit set to 64k):
It seems to happen suddenly (nothing really busy on the cluster).
We are trying out Marvel and most of the open file handles seem to be for those indexes.
Restarting the cluster clears up the issue but it has now reappeared after a few days. Anyone else run into simliar issues?