Query on one index pattern - Closed Index exception on another index


We are running a regular query to retrieve data from some index pattern, say


I get an exception:

IndexClosedException [logstash-abc-2016.01.01] closed
status: 403

This is a bit weird because in query I specify different index pattern and I get a closed index exception on different index.
What could be the possible reason behind it?

I can't reproduce this.

Does the index logstash-abc-2016.01.01 have an alias matching the index pattern?

If not, what is the complete actual search you are running?

Yes, I found a few indices have been given alias matching this index pattern by mistake.

Thanks for your help.