-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Chetouani,
On 9/15/2009 6:38 PM, Chetouani wrote: > Thanks for your answer. > > At the moment I don't have the stack trace but it something like > > # com.mysql.jdbc.CommunicationsException: Communications link failure due to > underlying exception: Right: your JDBC connection was closed and needs to be re-built. > I was using dbcp and I changed to c3p0 beacause I read that with c3p0 we can > add paramters to test the connections All connection pools I know of support this, including the stock commons-dbcp. Switching to c3p0 was not necessary -- at least not for this reason. > <property name="testConnectionOnCheckin" value="true"/> > <property name="testConnectionOnCheckout" value="true"/> > <property name="preferredTestQuery" value="SELECT 1"/> This would seem to be the correct configuration. You might want to add this to your MySQL connection URL: &dumpQueriesOnException=true This may allow you figure out which query is failing (whether it's the "SELECT 1" test query that is failing, or if it's an application query that is failing). > I use spring, hibernate/jpa and I am not dealing with the > connections at all. I am just injecting the data source like this : > > <!-- Creates a EntityManagerFactory for use with the Hibernate JPA provider > and data source --> > <bean id="entityManagerFactory" > class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> > <property name="dataSource" ref="dataSource" /> > <property name="jpaVendorAdapter"> > <bean > class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" /> > </property> > </bean> I don't know enough about Spring DataSources to know if this is appropriate, but if you can get JDBC connections from this thing, your configuration appears to be correct. Is it possible that you have more than one connection pool, and that you are re-configuring the wrong one? - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkqxU4EACgkQ9CaO5/Lv0PC5BgCdHLUv/lahiEmvkA55yE2MHJTN 1EMAnAiuRt+L75lc3Q3NxNoMkWQL4bvo =tpHe -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
