I am seeing a deadlock while running a statistics update .
It appears that each operation has a ROW lock which the other wants.
Any advice on how to avoid this?
I've enclosed the deadlock trace below:
2010-03-25 05:06:44,647 ERROR:AlertProcessor: AlertProcessor
org.springframework.dao.DeadlockLoserDataAccessException:
PreparedStatementCallback; SQL [DELETE FROM USER_DOMAIN_ALERT WHERE
ALERT_HANDLE=? ]; A lock could not be obtained due to a deadlock, cycle
of locks and waiters is:
Lock : ROW, SYSSTATISTICS, (8,2408)
Waiting XID : {271568763, S} , EMNOC, DELETE FROM USER_DOMAIN_ALERT
WHERE ALERT_HANDLE=?
Granted XID : {271568697, X}
Lock : ROW, SYSSTATISTICS, (11,2006)
Waiting XID : {271568697, X} , EMNOC, alter table
"EMNOC20"."USER_DOMAIN_ALERT" all update statistics
Granted XID : {271568763, S}
. The selected victim is XID : 271568763.; nested exception is
java.sql.SQLTransactionRollbackException: A lock could not be obtained
due to a deadlock, cycle of locks and waiters is:
Lock : ROW, SYSSTATISTICS, (8,2408)
Waiting XID : {271568763, S} , EMNOC, DELETE FROM USER_DOMAIN_ALERT
WHERE ALERT_HANDLE=?
Granted XID : {271568697, X}
Lock : ROW, SYSSTATISTICS, (11,2006)
Waiting XID : {271568697, X} , EMNOC, alter table
"EMNOC20"."USER_DOMAIN_ALERT" all update statistics
Granted XID : {271568763, S}
. The selected victim is XID : 271568763.
Caused by:
java.sql.SQLTransactionRollbackException: A lock could not be obtained
due to a deadlock, cycle of locks and waiters is:
Lock : ROW, SYSSTATISTICS, (8,2408)
Waiting XID : {271568763, S} , EMNOC, DELETE FROM USER_DOMAIN_ALERT
WHERE ALERT_HANDLE=?
Granted XID : {271568697, X}
Lock : ROW, SYSSTATISTICS, (11,2006)
Waiting XID : {271568697, X} , EMNOC, alter table
"EMNOC20"."USER_DOMAIN_ALERT" all update statistics
Granted XID : {271568763, S}
. The selected victim is XID : 271568763.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown
Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown
Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown
Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
Source)
at
org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
at
org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
at
org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
at
org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(Unknown
Source)
at
org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeUpdate(Unknown
Source)
at
org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
at
org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
at
org.springframework.jdbc.core.JdbcTemplate$2.doInPreparedStatement(JdbcTemplate.java:745)
at
org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:538)
at
org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:739)
at
org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:797)
at
org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:805)
at com.emnico.emnoc.generated.a.C.b(DBUserDomainAlert.java:72)
at com.emnico.emnoc.c.a.b(AlertProcessor.java:1118)
at com.emnico.emnoc.c.a.c(AlertProcessor.java:1078)
at com.emnico.emnoc.c.a.run(AlertProcessor.java:1492)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLException: A lock could not be obtained due to a
deadlock, cycle of locks and waiters is:
Lock : ROW, SYSSTATISTICS, (8,2408)
Waiting XID : {271568763, S} , EMNOC, DELETE FROM USER_DOMAIN_ALERT
WHERE ALERT_HANDLE=?
Granted XID : {271568697, X}
Lock : ROW, SYSSTATISTICS, (11,2006)
Waiting XID : {271568697, X} , EMNOC, alter table
"EMNOC20"."USER_DOMAIN_ALERT" all update statistics
Granted XID : {271568763, S}
. The selected victim is XID : 271568763.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown
Source)
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
Source)
... 21 more
Caused by: ERROR 40001: A lock could not be obtained due to a deadlock,
cycle of locks and waiters is:
Lock : ROW, SYSSTATISTICS, (8,2408)
Waiting XID : {271568763, S} , EMNOC, DELETE FROM USER_DOMAIN_ALERT
WHERE ALERT_HANDLE=?
Granted XID : {271568697, X}
Lock : ROW, SYSSTATISTICS, (11,2006)
Waiting XID : {271568697, X} , EMNOC, alter table
"EMNOC20"."USER_DOMAIN_ALERT" all update statistics
Granted XID : {271568763, S}
. The selected victim is XID : 271568763.
at
org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at
org.apache.derby.impl.services.locks.Deadlock.buildException(Unknown Source)
at
org.apache.derby.impl.services.locks.ConcurrentLockSet.lockObject(Unknown Source)
at
org.apache.derby.impl.services.locks.AbstractPool.lockObject(Unknown Source)
at
org.apache.derby.impl.store.raw.xact.RowLocking3.lockRecordForRead(Unknown
Source)
at
org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown
Source)
at
org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown
Source)
at
org.apache.derby.impl.store.access.btree.index.B2IRowLocking3.lockRowOnPage(Unknown
Source)
at
org.apache.derby.impl.store.access.btree.index.B2IRowLocking3._lockScanRow(Unknown
Source)
at
org.apache.derby.impl.store.access.btree.index.B2IRowLockingRR.lockScanRow(Unknown
Source)
at
org.apache.derby.impl.store.access.btree.BTreeForwardScan.fetchRows(Unknown
Source)
at
org.apache.derby.impl.store.access.btree.BTreeScan.fetchNext(Unknown Source)
at
org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getDescriptorViaIndexMinion(Unknown
Source)
at
org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getDescriptorViaIndex(Unknown
Source)
at
org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getStatisticsDescriptors(Unknown
Source)
at
org.apache.derby.iapi.sql.dictionary.TableDescriptor.getStatistics(Unknown
Source)
at
org.apache.derby.iapi.sql.dictionary.TableDescriptor.statisticsExist(Unknown
Source)
at
org.apache.derby.impl.sql.compile.FromBaseTable.estimateCost(Unknown Source)
at
org.apache.derby.impl.sql.compile.OptimizerImpl.estimateTotalCost(Unknown Source)
at
org.apache.derby.impl.sql.compile.OptimizerImpl.costBasedCostOptimizable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.OptimizerImpl.costOptimizable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.FromBaseTable.optimizeIt(Unknown Source)
at
org.apache.derby.impl.sql.compile.ProjectRestrictNode.optimizeIt(Unknown
Source)
at
org.apache.derby.impl.sql.compile.OptimizerImpl.costPermutation(Unknown
Source)
at org.apache.derby.impl.sql.compile.SelectNode.optimize(Unknown
Source)
at
org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unknown
Source)
at
org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unknown
Source)
at
org.apache.derby.impl.sql.compile.DMLModStatementNode.optimizeStatement(Unknown
Source)
at
org.apache.derby.impl.sql.compile.DeleteNode.optimizeStatement(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at
org.apache.derby.impl.sql.GenericPreparedStatement.rePrepare(Unknown Source)
... 15 more
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