re:java.lang.Exception: ORA-00020: maximum number of processes (150) exceeded?

[Subhashini Sekar]

Can any one help in this regard. This very urgent issue for us.

We have similar error happening while accessing our DB. We are using ADF frame work of Oracle 10g. and Oracle Appserver.

For each session the application opens 13 Database connections. This we monitor in Appserver admin screen. When the connections are more than 150 we get the following error.
ORA-00020: maximum number of processes (150) exceeded?
We are using JDBC Data source and the data-sources.xml($ORACLE_HOME/j2ee/home/config) looks like this

<data-source name="jdev-connection-DB"
class="com.evermind.sql.OrionCMTDataSource"
location="jdbc/DBCoreDS"
xa-location="jdbc/xa/DBXADS"
ejb-location="jdbc/DBDS"
pooled-location="jdbc/DBPooledDS"
connection-driver="oracle.jdbc.driver.OracleDriver"
username="uname"
password="pwd"
url="jdbc racle:thin:@//localhost:1521/osid"
inactivity-timeout="30"
min-connections="0"
max-connections="150">
<property name="cacheScheme" value="1"/>

</data-source>
Though we have set the ApplicationModule property jbo.doconnectionpooling to "true" the unused connections are not getting released.

Do we have to connection pool the database connections as well .
Can anyone help us how to implement connection pooling of Database connection along with Application module pooling

[Ben Souther]

Originally posted by Subhashini Sekar:

Do we have to connection pool the database connections as well .[sic]

That would be my recommendation.
By tying connections to sessions, you're probably keeping them open a lot longer than necessary.

Originally posted by Subhashini Sekar:

Can anyone help us how to implement connection pooling of Database connection along with Application module pooling

You best bet will be our Oracle Forum.
I'll move this thread there for you.