Re: OT/ Tomcat, Hibernate and MYSQL problem

[Mark Lowe]

If its a gamma release you can try whatever the most stable one is at 
the moment.. 3.0.14 i think..

If you want a real-world production example I've had an app running for 
about 4 months thats not even been restarted using

mysql-connector-java-2.0.14-bin.jar
I had exactly the same issue. using a version 3 jdbc driver for mysql.
Mark
On 30 Jul 2004, at 11:07, Marco Mistroni wrote:
Hello,
        If I remember correct, mysql connector 3.0.11
Regards
        marco
-----Original Message-----
From: Mark Lowe [mailto:[EMAIL PROTECTED]
Sent: 30 July 2004 09:36
To: Struts Users Mailing List
Subject: Re: OT/ Tomcat, Hibernate and MYSQL problem
Marco
What jdbc driver are you using?
They was a shady version 3 behaving like this.
On 30 Jul 2004, at 10:05, Joe Hertz wrote:
Hibernate's internal connection pooling isn't meant for production
because it does things just like that.
Suggest you use c3p0 for the pooling.
From my hibernate.cfg.xml, I only had to add this:
       <property name="c3p0.minPoolSize">5</property>
       <property name="c3p0.maxPoolSize">20</property>
       <property name="c3p0.timeout">1800</property>
       <property name="c3p0.max_statement">50</property>
HTH
-Joe

-----Original Message-----
From: Marco Mistroni [mailto:[EMAIL PROTECTED]
Sent: Friday, July 30, 2004 3:58 AM
To: 'Struts Users Mailing List'
Subject: OT/ Tomcat, Hibernate and MYSQL problem
Hello,
        First of all, I apologize for the off topic issue..
I know this is not the list, but I tried hibernate forums,
and Searched the web with no solution.. hopefully some of u
had the Same problem and solved it..
I m experiencing problems with Hibernate in tomcat, talking to mysql.
My situation is that I didn't define any connection pools in
tomcat, but left it to Hibernate to handle that...
After leaving the application running for 11 hours, I got
following exception
hi all,
i have a webapp taht uses Hibernate and MYSQL, running on top
of tomcat.
i am letting Hibernate handle the connections to mysql db,
since i have no connection pools defined in tomcat.
after running the application for nearly 9 hours, when i
tried to use my app to connect to the database i got
following exception:
Caused by: net.sf.hibernate.JDBCException: Could not execute query
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1476)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:45)
at
com.myapp.hibernate.HibernatePersistenceManager.query(Hibernat
ePersisten
ceManager.java:205)
... 31 more
Caused by: java.sql.SQLException: Communication link failure:
java.net.SocketException, underlying cause: Software caused
connection
abort: recv failed
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: Software caused connection abort: recv failed
STACKTRACE:
java.net.SocketException: Software caused connection abort:
recv failed

now i have searched the web and found two possible
alternatives.. one was to add following problems to hibernate
config file.. <property
name="connection.autoReconnect">true</property>
<property name="connection.autoReconnectForPools">true</property>
<property
name="connection.is-connection-validation-required">true</property>
but this does not work, as ihave added thos eproperties to
hibernate properties file and i am still getting same exception
then I tried to add ?autoReconnect=true  to JBDC URL, but
that didn't work either coz I left application running for 11
hours and after that I got same exception...
can anyone help me out?
THANX in advance and regards
        marco

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