Re: Deadlock while updating statistics

Fri, 26 Mar 2010 07:02:18 -0700 


Sorry, I am using Derby 10.5.3.0

Thanks
Jon

On 26/03/2010 13:49, Jon Pearson wrote:


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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