About "IndexNotFoundException" after replica set

Elastic Stack Elasticsearch
1

[System Info]
instance : 6ea (node : 6ea)

  • cpu : 16core
  • ram : 64GB
  • jvm heap : 16GB

We have created one index and done full indexing like the below steps.

[Steps]

  1. create index (refresh interval : -1, replica : 0)
  2. full indexing with bulk (total index size is 1.8GB)
  3. _flush
  4. check "commited" is true for all segments of created index (GET index_name/_segments)
  5. refresh and set refresh interval to 30s
  6. set replica to 5

When we do the last step(set replica to 5), there are so many logs "IndexNotFoundException: no segments" from master node.
And then we can't access master node because of those errors for long time..
As I described from step 4, We have checked commited status for all segments to prevent uncommited segments after _flush.
Could we know why this issue was happened and how to handle it?

2

This is not the whole message. It's hard to say what it means from this fragment alone. Please share exactly what you're seeing.

Also what version are you using?

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