But if so, shoudn't I see openned connection (socket) to the
database server
?
Hmm, I'm not sure how the commons-pool is using the connection. In my opinion:
yes there should be a lot of open connections. But I'm not sure about this. You
can test this by increasing the number of max allowed connections and verify if
they are all used frequently (I know that you can get some statistics
informations in MySQL with SHOW xyz...).
I do have many transactions. It is an heavy application.
Sometimes work
fine for
one or two days and then crash (stop working), both Mysql
and MSSQL,
almost
simultaneously.
The Mysql server has much less connection (transaction) than
MSSql, but when
I got the
Could not retrieve connection info from pool both of them
stop working.
That's strange. I thought that the pools are independent. But your explanation
says my that they aren't. Maybe you're right and there are some network
problems too.
Not all Could not retrieve connection info from pool stops
my application,
sometimes
it continue to run just after a get that message.
My guess it some network problem occurred and the container
could not handle re-open of the connections. Even though
I've set the validationQuery.
Thank you.
Eduardo.
- Original Message -
From: Thoralf Rickert [EMAIL PROTECTED]
To: Apache Torque Users List torque-user@db.apache.org
Sent: Wednesday, May 02, 2007 8:22 AM
Subject: AW: Could not retrieve connection info from pool
Hi!
Is it possible, that your application uses many transactions?
If you forget
to close this connections - the pool is running out of
connections from time
to time. Maybe there is just one unclosed transaction
somewhere in your
application. If you have a lot of traffic on your site you
can increase the
number of max connections...but I'm sure there is missing commit() or
safeRollback().
bye
Thoralf
-Ursprüngliche Nachricht-
Von: Eduardo Kinto [mailto:[EMAIL PROTECTED]
Gesendet: Mittwoch, 2. Mai 2007 13:09
An: torque-user@db.apache.org
Betreff: Could not retrieve connection info from pool
Hello,
I'm using Torque to connect to my MSSql and MySQL Server database.
Everything is working fine, just one problem, some times Database
connection fail and don't come back (both, mysql and
mssql) by it self and I have to restart my webserver (where it is
running my application).
Running the command netstat, I can't see any connnection to
database
server.
I'm using:
- torque-3.2.jar
- apache tomcat 5.5.12
- java jdk 1.5.0_06
- RedHat Linux Enterprise 4
And the folowing torque setup for mysql:
torque.dsfactory.APP.factory =
org.apache.torque.dsfactory.SharedPoolDataSourceFactory
torque.dsfactory.APP.connection.driver = com.mysql.jdbc.Driver
torque.dsfactory.APP.connection.url =
jdbc:mysql://IP:PORT/APP?autoReconnect=true
torque.dsfactory.APP.connection.user = yyy
torque.dsfactory.APP.connection.password = xxx
torque.dsfactory.APP.pool.defaultTransactionIsolation=1
torque.dsfactory.APP.pool.maxWait=60
torque.dsfactory.APP.pool.maxActive=32
torque.dsfactory.APP.pool.maxIdle=32
torque.dsfactory.APP.pool.testOnBorrow=true
torque.dsfactory.APP.pool.validationQuery=SELECT 1
And for MSSqlServer:
torque.dsfactory.APP2.factory =
org.apache.torque.dsfactory.SharedPoolDataSourceFactory
torque.dsfactory.APP2.connection.driver =
net.sourceforge.jtds.jdbc.Driver
torque.dsfactory.APP2.connection.url
= jdbc:jtds:sqlserver://IP:1433/DATABASE
.. similary to mysql ...
The ERROR message:
org.apache.torque.TorqueException:
org.apache.commons.dbcp.SQLNestedException: Could not retrieve
connection info from pool
at
org.apache.torque.TorqueInstance.getConnection(TorqueInstance.
java:825)
at org.apache.torque.Torque.getConnection(Torque.java:272)
at
org.apache.torque.util.BasePeer.doPSSelect(BasePeer.java:1478)
...
Caused by: org.apache.commons.dbcp.SQLNestedException: Could not
retrieve connection info from pool
at
org.apache.commons.dbcp.datasources.SharedPoolDataSource.getPo
oledConnectionAndInfo(SharedPoolDataSource.java:169)
at
org.apache.commons.dbcp.datasources.InstanceKeyDataSource.getC
onnection(InstanceKeyDataSource.java:631)
at
org.apache.commons.dbcp.datasources.InstanceKeyDataSource.getC
onnection(InstanceKeyDataSource.java:615)
at
org.apache.torque.TorqueInstance.getConnection(TorqueInstance.
java:821)
... 11 more
Caused by: java.lang.NullPointerException
at
org.apache.commons.collections.SequencedHashMap.removeEntry(Se
quencedHashMap.java:215)
at
org.apache.commons.collections.SequencedHashMap.removeImpl(Seq
uencedHashMap.java:473)
at
org.apache.commons.collections.SequencedHashMap.remove(Sequenc
edHashMap.java:460
