c3p0 - hibernate 4 session connection remains open -

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i use hibernate mysql database in java application migrate hibernate 3 hibernate 4 in new hibernate number of busy thread increased , use of connections application stop working , can not give connection more. hibernate.cfg configuration bellow:

        <property name="dialect">org.hibernate.dialect.mysqldialect</property>         <!-- enable hibernate's automatic session context management -->         <property name="current_session_context_class">thread</property>         <property name="hibernate.current_session_context_class">thread</property>         <!-- disable second-level cache -->         <property name="hibernate.cache.use_second_level_cache">true</property>         <!--<property name="hibernate.cache.provider_class">             net.sf.ehcache.hibernate.ehcacheprovider         </property>-->         <property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.singletonehcacheregionfactory</property>         <property name="hibernate.cache.use_query_cache">true</property>          <!--<property name="hibernate.generate_statistics">true</property>-->          <!--c3p0 configure-->         <property name="hibernate.connection.provider_class">             org.hibernate.connection.c3p0connectionprovider         </property>         <property name="hibernate.c3p0.acquire_increment">3</property>         <property name="hibernate.c3p0.idle_test_period">144</property>         <property name="hibernate.c3p0.timeout">60</property>         <property name="hibernate.c3p0.max_size">30</property>         <property name="hibernate.c3p0.min_size">3</property>         <property name="hibernate.c3p0.max_statements">0</property>         <property name="hibernate.c3p0.preferredtestquery">select 1;</property>         <property name="hibernate.c3p0.validate">true</property>         <property name="hibernate.c3p0.testconnectiononcheckout">true</property>

i set timeout small value , increase max_size , set use_second_level_cache=false no improvement made

what problem

thanks lot

so sounds connection leak in application. use c3p0 config params unreturnedconnectiontimeout , debugunreturnedconnectionstacktraces debug it.

see here.

(in hibernate.cfg they'd hibernate.c3p0.unreturnedconnectiontimeout , hibernate.c3p0.debugunreturnedconnectionstacktraces.)


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