Caused By: oracle.mds.config.MDSConfigurationException: MDS-01330: unable to load MDS configuration document
MDS-01329: unable to load element "persistence-config"
MDS-01370: MetadataStore configuration for metadata-store-usage "OWSM_TargetRepos" is invalid.
MDS-01377: Unable to get database connection from data source configured with JNDI name "jdbc/mds/owsm".
weblogic.common.resourcepool.ResourceDeadException: 0:weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: Listener refused the connection with the following error:
ORA-12516, TNS:listener could not find available handler with matching protocol stack

Knowing that the Listeners were up and running, the JNDI configuration was correct

The listeners are up and running...

[oracle@localhost dbs]$ lsnrctl status
Services Summary...
Service "ORCL" has 1 instance(s).
Instance "ORCL", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
Instance "ORCL", status READY, has 1 handler(s) for this service...
The command completed successfully

`

db_name='ORCL'
memory_target=1G
processes = 150
audit_file_dest='/home/oracle/app/oracle/admin/orcl/adump'
audit_trail ='db'
db_block_size=8192
db_domain=''
db_recovery_file_dest='/home/oracle/app/oracle/flash_recovery_area'
db_recovery_file_dest_size=2G
diagnostic_dest='/home/oracle/app/oracle'
dispatchers='(PROTOCOL=TCP) (SERVICE=ORCLXDB)'
open_cursors=300
remote_login_passwordfile='EXCLUSIVE'
undo_tablespace='UNDOTBS1'
# You may want to ensure that control files are created on separate physical
# devices
control_files = (ora_control1, ora_control2)
compatible ='11.2.0'

Alter the system processes and sessions (against the database) and restart the database and web application

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

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