Eungsop Yoo created HBASE-27547:
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Summary: Close store file readers after region warmup
Key: HBASE-27547
URL: https://issues.apache.org/jira/browse/HBASE-27547
Project: HBase
Issue Type: Bug
Reporter: Eungsop Yoo
We recently upgraded one of our clusters from version 1.4.13 to 2.4.15. After
that we noticed that the number of open FD was increased 10 times more than
before, from 1.3k to 15k. Each RS has about 1000 regions.
I thouht that it is OK if the number of open FD keeps steady. But the number
was increased when regions were balanced. I found that there is a bug related
to the region warmup process, which leaks opened FDs, and I fixed it. Please
review the PR.
But I still have a question about why HBase 2.4 opens much more than 1.4. I am
trying to find the answer, but not yet. Is there any person who can answer the
question?
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