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https://issues.apache.org/jira/browse/HIVE-11902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14907015#comment-14907015
]
Deepesh Khandelwal commented on HIVE-11902:
-------------------------------------------
Thanks [~ekoifman] for the review and commit!
> Abort txn cleanup thread throws SyntaxErrorException
> ----------------------------------------------------
>
> Key: HIVE-11902
> URL: https://issues.apache.org/jira/browse/HIVE-11902
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Reporter: Deepesh Khandelwal
> Assignee: Deepesh Khandelwal
> Fix For: 1.3.0
>
> Attachments: HIVE-11902.patch
>
>
> When cleaning left over transactions we see the DeadTxnReaper code threw the
> following exception:
> {noformat}
> 2015-09-21 05:23:38,148 WARN [DeadTxnReaper-0]: txn.TxnHandler
> (TxnHandler.java:performTimeOuts(1876)) - Aborting timedout transactions
> failed due to You have an error in your SQL syntax; check the manual that
> corresponds to your MySQL server version for the right syntax to use near ')'
> at line 1(SQLState=42000,ErrorCode=1064)
> com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error
> in your SQL syntax; check the manual that corresponds to your MySQL server
> version for the right syntax to use near ')' at line 1
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
> at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
> at com.mysql.jdbc.Util.getInstance(Util.java:360)
> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:978)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823)
> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
> at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2526)
> at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1618)
> at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1549)
> at
> com.jolbox.bonecp.StatementHandle.executeUpdate(StatementHandle.java:497)
> at
> org.apache.hadoop.hive.metastore.txn.TxnHandler.abortTxns(TxnHandler.java:1275)
> at
> org.apache.hadoop.hive.metastore.txn.TxnHandler.performTimeOuts(TxnHandler.java:1866)
> at
> org.apache.hadoop.hive.ql.txn.AcidHouseKeeperService$TimedoutTxnReaper.run(AcidHouseKeeperService.java:87)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> The problem here is that the method {{abortTxns(Connection dbConn, List<Long>
> txnids)}} in
> metastore/src/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
> creates the following bad query when txnids list is empty.
> {code}
> delete from HIVE_LOCKS where hl_txnid in ();
> {code}
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