Lots of disconnected logs and then OOM

[DavidTurner]

I think you already asked this, or something very like it, here:

Es node suddenly OOM with "fatal error on the network layer"

hi, ES version: 5.4.3 java version: 1.8.0_162 ES was running normally and GC is normal too. But one node suddenly OOM with "fatal error on the network layer" logs link: Does anyone meet this before? How to debug this problem ? Thank you in advance!

As before:

Es node suddenly OOM with "fatal error on the network layer"

By default Elasticsearch will write a heap dump when it encounters an OutOfMemoryError. The best thing to do is to open this heap dump (e.g. in MAT) and investigate what was using all the heap.

If you need help investigating your heap dump then you can ask more detailed questions here of course.