javax.management.InstanceAlreadyExistsException after Creating the Second UCP
(Doc ID 1925227.1)
Last updated on MARCH 05, 2025
Applies to:
Universal Connection Pool - Version 11.2.0.3.0 to 11.2.0.4.0 [Release 11.2]Information in this document applies to any platform.
Symptoms
When two or more instances of universal Connection Pool (UCP) are started within the same JVM, the following error is reported:java.sql.SQLException: Unable to start the Universal Connection Pool:
oracle.ucp.UniversalConnectionPoolException: Universal Connection Pool
internal error:
java.security.PrivilegedActionException: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:488)
at oracle.ucp.util.UCPErrorHandler.throwSQLException(UCPErrorHandler.java:163)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:646)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:907)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:863)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:855)
......
Caused by: oracle.ucp.UniversalConnectionPoolException: Universal Connection Pool
internal error: java.security.PrivilegedActionException: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:368)
at oracle.ucp.util.UCPErrorHandler.throwUniversalConnectionPoolException(UCPErrorHandler.java:49)
at oracle.ucp.util.UCPErrorHandler.throwUniversalConnectionPoolException(UCPErrorHandler.java:80)
at oracle.ucp.util.UCPErrorHandler.throwUniversalConnectionPoolException(UCPErrorHandler.java:146)
at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl.getUniversalConnectionPoolManagerMBean(UniversalConnectionPoolManagerMBeanImpl.java:169)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:620)
... 7 more
This issue occurs on UCP 11.2.0.3, so <Document:1354558.1> MBean exception InstanceAlreadyExistsException With Universal Connection Pool is not applicable in this case.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |