elasticsearch restart leave unassigned shards

Question

I have to restart elasticsearch cluster nodes because of some timeout exceptions I did restart the nodes one by one there are 5 data nodes in cluster But when I did that it leave some shards unassigned and I have no replicas There is nothing help full in logs. Can I get some help to know why these shards remain unassigned and any solution Thanks

Answer 1

Run this against your cluster, should rerun the command once shards have relocated however change the false parameter to true -

curl -XPUT 'localhost:9200/_settings' -d ' {"index.routing.allocation.disable_allocation": false}'

Answer 2

yeah, you will find some shards as unassigned. Give them some time to get allocated after the cluster gets restarted