Data Access Objects : JDBC Driver Not Found

Question

Hi,
I am having a strange problem accessing JDBC Driver ( for Informix Database, if this
information helps )
I am using Data Access Objects ( DAOs ) to fetch multiple records.
The DAO is accessed from Session Bean for this case.
The constructor of the DAO does the JNDI lookup for the TxDataSource
and set it to a class attribute of the DAO. This DataSource is pointing
to a connection pool
In the getConnection() private method if DAO we use this DataSource
to pickup a onnection from the pool and fire a sql query.
This public method say getMultipleRecords( query conditions ) of DAO
returns a number of macthing records to the Session Bean.
This approach works fine in general. But sometimes I get an
java.sql.SQLException
SQLException ERROR MESSAGE is:
"Error accessing jdbc driver: driverURL = jdbc:weblogic:pool:myConnPool, props= {enableTwoPhaseCommit=true,
connectionPoolID=myConnPool}"
Once this exception occurs every time the method is called the same exception keep
coming.
Once I restart the server this API starts working again.
Could anyone give any reason why this exception might occur.
Please send an e-mail to [email protected] while replying to this message.
Thanks in advance
Gunajit

Answer 1

Hi Gunajit
you need to ensure that the connections are properly closed. If you are
closing the connections properly, increase the number of connections in the
connection pool.
hth
sree
"Gunajit" <[email protected]> wrote in message
news:3ce082ca$[email protected]..
>
Hi,
I am having a strange problem accessing JDBC Driver ( for InformixDatabase, if this
information helps )
I am using Data Access Objects ( DAOs ) to fetch multiple records.
The DAO is accessed from Session Bean for this case.
The constructor of the DAO does the JNDI lookup for the TxDataSource
and set it to a class attribute of the DAO. This DataSource is pointing
to a connection pool
In the getConnection() private method if DAO we use this DataSource
to pickup a onnection from the pool and fire a sql query.
This public method say getMultipleRecords( query conditions ) of DAO
returns a number of macthing records to the Session Bean.
This approach works fine in general. But sometimes I get an
java.sql.SQLException
SQLException ERROR MESSAGE is:
"Error accessing jdbc driver: driverURL = jdbc:weblogic:pool:myConnPool,props= {enableTwoPhaseCommit=true,
connectionPoolID=myConnPool}"
Once this exception occurs every time the method is called the sameexception keep
coming.
Once I restart the server this API starts working again.
Could anyone give any reason why this exception might occur.
Please send an e-mail to [email protected] while replying to this
message.
>
Thanks in advance
Gunajit