David Mollitor created HIVE-22469:
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Summary: Lower Metastore DB Connection Pool Size in QTests
Key: HIVE-22469
URL: https://issues.apache.org/jira/browse/HIVE-22469
Project: Hive
Issue Type: Improvement
Components: Test, Tests
Affects Versions: 3.2.0
Reporter: David Mollitor
Assignee: David Mollitor
Hive Metastore uses the 'HikariCP' database connection pool. The default
number of connections to the database is 10. For the Qtests, connecting to a
local DerbyDB, there need not be more than 1 connection. Anymore simply adds
undo overhead and by looking at the QTest logs, I see a bunch of 'connection
refused' from HikariCP. It may be the case that the standalone DB does not
support that many concurrent connections anyway.
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-MetaStore
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