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I'm trying to launch the OPMN-managed process OC4J_EM, which is needed for Oracle's Enterprise Manager. When I run use the startall or startproc command, I get an error:

failed to start a managed process after the maximum retry limit

And am redirected to a log file. Checking this log file, I see the following for each attempt:

11/11/29 14:00:20 java.sql.SQLException: Logical handle no longer valid
11/11/29 14:00:20       at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:189)
11/11/29 14:00:20       at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:231)
11/11/29 14:00:20       at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:294)
11/11/29 14:00:20       at oracle.jdbc.driver.OracleConnection.checkPhyiscalStatus(OracleConnection.java:704)
11/11/29 14:00:20       at oracle.jdbc.driver.OracleConnection.commit(OracleConnection.java:1364)
11/11/29 14:00:20       at oracle.sysman.util.jdbc.ConnectionWrapper.commit(ConnectionWrapper.java:478)
11/11/29 14:00:20       at oracle.sysman.emSDK.svc.conn.FGAConnection.fgaClose(FGAConnection.java:170)
11/11/29 14:00:20       at oracle.sysman.emSDK.svc.conn.FGAConnection.close(FGAConnection.java:151)
11/11/29 14:00:20       at oracle.sysman.util.jdbc.JDBCUtil.close(JDBCUtil.java:121)
11/11/29 14:00:20       at oracle.sysman.util.jdbc.JDBCUtil.close(JDBCUtil.java:75)
11/11/29 14:00:20       at oracle.sysman.emdrep.dbjava.sqleval.BadSQLEvaluation.run(BadSQLEvaluation.java:152)
11/11/29 14:00:20 WebApplicationBinder is null!

Any ideas as to how I can fix this and get OC4J_EM started?

share|improve this question
A few comments. 1) Is this Grid control or database control ? 2) The error message is db connection related - are the db and listener up? 3) Can you connect via sqlplus from the em home –  Niall Litchfield Nov 29 '11 at 10:26

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