High JVM Heap usage for inactive Master node

Elastic Stack Elasticsearch
1

Hi there,

Can someone please point me in the right direction to understand what could be possible reasons of high heap usage by inactive/idle master node. This node doesn't participate in indexing or querying data and dedicated to master node config so i couldn't understand as to why this node is consuming high heap mem (71.5% max). Generally it goes upto 72% and comes down to 12% and again in few days shows rapid mem growth.

our elk set up is as follows -

  1. 3 dedicated master nodes -
  • out of which only 1 inactive master consumes high heap mem (>70%)

  • other idle master consumes between 6-7% heap mem

  • Finally active master consumes ~40% heap mem
  1. Master node heap mem size - 15 GB (50% of total mem)
  2. elastic version - 6.4.2
  3. 5 data nodes - heap mem is usually between 50-60% which is OK

Thanks in advance

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