bharath v created HIVE-9938:
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Summary: Add retry logic to DbTxnMgr instead of aborting
transactions.
Key: HIVE-9938
URL: https://issues.apache.org/jira/browse/HIVE-9938
Project: Hive
Issue Type: Improvement
Affects Versions: 0.14.0
Reporter: bharath v
Sometimes parallel updates using DBTxnMgr results in the following error trace
5325 [main] INFO org.apache.hadoop.hive.ql.log.PerfLogger - <PERFLOG
method=acquireReadWriteLocks from=org.apache.hadoop.hive.ql.Driver>
5351 [main] ERROR org.apache.hadoop.hive.ql.Driver - FAILED: Error in acquiring
locks: Error communicating with the metastore
org.apache.hadoop.hive.ql.lockmgr.LockException: Error communicating with the
metastore
at org.apache.hadoop.hive.ql.lockmgr.DbLockManager.lock(DbLockManager.java:100)
at
org.apache.hadoop.hive.ql.lockmgr.DbTxnManager.acquireLocks(DbTxnManager.java:194)
Internally looking at the postgres logs we see
2015-02-02 06:36:05,632 ERROR
org.apache.hadoop.hive.metastore.RetryingHMSHandler:
org.apache.thrift.TException: MetaException(message:Unable to update
transaction database org.postgresql.util.PSQLException: ERROR: could not
serialize access due to concurrent update
Ideally we should add a retry logic to retry the failed transaction.
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