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How to Analyze thread dump from hiveserver?

Explorer

Recently we had issue with hiveserver2.

After increasing the hive.server2.thrift.max.worker.threads to 1000 the issue seems to have resolved.

How can we analyze the hiveserver jstack/threadump?

What is the maximum value of hive.server2.thrift.max.worker.threads can have?

Do we need to consider memory or anything while increasing threads?