Deadlock in KMC_DBRM_TMPNODES

Hello,

We have built a WebDynpro application using KMC module, and integrated in the EP.

Our systems is based on Oracle, SPS16 and patch #3 for KMC. The server has 1 Java dispatcher and 2 server processes.

Our application stores data in a dedicated CM Repository, and searches resources matching Predefined Properties using the "com.sapportals.wcm.repository.manager.cm.CmPropertySearchManager"Property Search Manager.

When I perform a load test with 20 concurrent users, I get the following exception :

#1.5#00E08131AFB2005D0000001500000CDC00041E7F1A669B41#1159431159410#com.sap.sql.jdbc.direct.DirectPreparedStatement#sap.com/tc_wddispwda#com.sap.sql.jdbc.direct.DirectPreparedStatement#rise_eu1#53####121216d04ec911db933300e08131afb2#ID\#(J2EE4659200)ID0963799650DB11903176495300471993End.WID1159341490666##0#0#Error#1#/System/Database/sql/jdbc/direct#Java#com.sap.sql_0003##SQL error occurred on connection KM4:nwb:SAPNWBDB: code=60, state="61000", message="ORA-00060: deadlock detected while waiting for resource

";

SQL statement is "DELETE FROM "KMC_DBRM_TMPNODES"".#5#60#61000#ORA-00060: deadlock detected while waiting for resource

#KM4:nwb:SAPNWBDB#DELETE FROM "KMC_DBRM_TMPNODES"#

#1.5#00E08131AFB2005D0000001600000CDC00041E7F1A66A875#1159431159410#com.sap.sql.jdbc.direct.DirectPreparedStatement#sap.com/tc_wddispwda#com.sap.sql.jdbc.direct.DirectPreparedStatement#rise_eu1#53####121216d04ec911db933300e08131afb2#ID\#(J2EE4659200)ID0963799650DB11903176495300471993End.WID1159341490666##0#0#Error##Plain###java.sql.SQLException: ORA-00060: deadlock detected while waiting for resource

     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)

     at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)

     at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:589)

     at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1957)

     at oracle.jdbc.ttc7.TTC7Protocol.executeFetch(TTC7Protocol.java:975)

     at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2187)

     at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2063)

     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2922)

     at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:644)

     at com.sap.sql.jdbc.basic.BasicPreparedStatement.executeUpdate(BasicPreparedStatement.java:103)

     at com.sap.sql.jdbc.oracle.Oracle9iPreparedStatement.executeUpdate(Oracle9iPreparedStatement.java:465)

     at com.sap.sql.jdbc.direct.DirectPreparedStatement.executeUpdate(DirectPreparedStatement.java:311)

     at com.sap.sql.jdbc.common.CommonPreparedStatement.executeUpdate(CommonPreparedStatement.java:314)

     at com.sap.engine.services.dbpool.wrappers.PreparedStatementWrapper.executeUpdate(PreparedStatementWrapper.java:240)

     at com.sapportals.wcm.repository.manager.cm.persistence.commonjdbc.PersistenceCommonJDBC.executeQuery(PersistenceCommonJDBC.java:849)

     at com.sapportals.wcm.repository.manager.cm.CmPropertySearchManager.execute(CmPropertySearchManager.java:86)

...

Is that a known bug of KMC ?

Have you already met this problem ?

Best Regards,

Nicolas