I am getting a flood of the following messages.
at org.elasticsearch.common.io.stream.StreamOutput.writeException(StreamOutput.java:942) ~[elasticsearch-6.4.2.jar:6.4.2]
at org.elasticsearch.common.io.stream.StreamOutput.writeException(StreamOutput.java:940) ~[elasticsearch-6.4.2.jar:6.4.2]
at org.elasticsearch.ElasticsearchException.writeStackTraces(ElasticsearchException.java:743) ~[elasticsearch-6.4.2.jar:6.4.2]
I have no idea what is causing them. Please suggest.