NodeDisconnect Exception

Elastic Stack Elasticsearch
1

I see whole load of below exceptions in the log. May i know what could be causing this issue ?

tried to fail engine but could not acquire lock - engine should be failed by now [primary shar
d [[index_1][13], node[e__dqz3CS1GWuRhOEbozMw], [P], s[STARTED], a[id=x_7pm6iBTB-a7ilI8MkbAA]] was demoted while failing replica shard]
org.elasticsearch.cluster.action.shard.ShardStateAction$NoLongerPrimaryShardException: primary term [1] did not match current primary term [2]

2

This indicates that Elasticsearch was trying to handle a failure gracefully but could not do so because of another concurrent failure.

3

Thanks David. However could you please explain what the failure is ? That would be very helpful. Thanks.

4

No, it's not possible to give much more detail from this tiny excerpt from your logs. We'll need to see all the other messages from around the same time.

5

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