ORA-12516, TNS: listener could not find available handler with matching protocol stack'

Error: 'Oracle XE: ORA-12516, TNS: listener could not find available handler with matching protocol stack' When Running the RunETL Process [ID 1100982.1]
		修改时间 28-DEC-2011     类型 PROBLEM     状态 PUBLISHED

In this Document
  Symptoms
  Cause
  Solution
  References

Applies to:

Primavera P6 Reporting Database - Version: R1 to R2.1 - Release: R1 to R2
Information in this document applies to any platform.
***Checked relevance on 28-Dec-2011***

Symptoms

When running runetl.bat on an Oracle XE database the process fails with error:

Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack

Cause

The Oracle XE Database is configured by default to run only 20 or 40 PROCESSES; the maximum load for dedicated connections is determined by the PROCESSES parameter.

When the listener believes the current number of connections has reached maximum load, it may set the state of the service handler for an instance to "blocked" and begin refusing incoming client connections with the error:

TNS-12516 TNS:listener could not find instance with matching protocol stack

Solution

To resolve the issue, do the following:

1) Connect to the XE database using the sys or system user:

sqlplus system/<password>

2) To confirm the PROCESSES and SESSIONS values, run the following script:

sql> col name format A30
sql> col value format A30
sql> select name, value from v$parameter where name in ('processes','sessions');

3) Run the following commands to set the PROCESSES and SESSIONS to a higher value:

SQL> alter system set processes=300 scope=spfile;
SQL> alter system set sessions=300 scope=spfile;

5) Restart the XE database to reflect the changes

6) To confirm new values re-run the script in.step 2.

References

NOTE:240710.1 - Intermittent TNS-12516 or TNS-12519 Errors When Connecting Via Oracle Net