ES 1.7.x on CentOS
Our production ES cluster went down hard. We lost the entire index. Turns out, this had been in the logs for a day or more:
New used memory from field ### would be larger than configured breaker
OK.
What url on ES can I hit to see that issues are happening? (Log monitoring is not part of our monitoring regime, but hitting an ES url is easy for us.)
We use cluster health urls now, so we see the cluster go yellow/red, but (so far), we have not seen how to externally see problems coming (so we get clobbered).