Chaoyu Tang created HIVE-10835:
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Summary: Concurrency issues in JDBC driver
Key: HIVE-10835
URL: https://issues.apache.org/jira/browse/HIVE-10835
Project: Hive
Issue Type: Bug
Components: JDBC
Affects Versions: 1.2.0
Reporter: Chaoyu Tang
Assignee: Chaoyu Tang
Though JDBC specification specifies that "Each Connection object can create
multiple Statement objects that may be used concurrently by the program", but
that does not work in current Hive JDBC driver. In addition, there also exist
race conditions between DatabaseMetaData, Statement and ResultSet as long as
they make RPC calls to HS2 using same Thrift transport, which happens within a
connection.
So we need a connection level lock to serialize all these RPC calls in a
connection.
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