[HIVE-11939] TxnDbUtil should turn off jdbc auto commit

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.3.0, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Jimmy Xiang
• Reporter: Jimmy Xiang
• Created: 23/Sep/15 22:11
• Updated: 16/Feb/16 23:52
• Resolved: 25/Sep/15 15:36

Description

TxnDbUtil uses jdbc transactions, but doesn't turn off auto commit. So some TestStreaming tests are flaky. For example,

testTransactionBatchAbortAndCommit(org.apache.hive.hcatalog.streaming.TestStreaming)  Time elapsed: 0.011 sec  <<< ERROR!
java.sql.SQLException: Table/View 'TXNS' already exists in Schema 'APP'.
	at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
	at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.duplicateDescriptorException(Unknown Source)
	at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.addDescriptor(Unknown Source)
	at org.apache.derby.impl.sql.execute.CreateTableConstantAction.executeConstantAction(Unknown Source)
	at org.apache.derby.impl.sql.execute.MiscResultSet.open(Unknown Source)
	at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
	at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
	at org.apache.hadoop.hive.metastore.txn.TxnDbUtil.prepDb(TxnDbUtil.java:72)
	at org.apache.hadoop.hive.metastore.txn.TxnDbUtil.prepDb(TxnDbUtil.java:131)
	at org.apache.hive.hcatalog.streaming.TestStreaming.<init>(TestStreaming.java:160)