我有一个应用程序，我正在使用Hibernate 3.4和c3p0 0.9.1。我面临数据库连接超时错误。
我的Persistence.xml文件是
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="hibernate.connection.url" value="jdbc:mysql://XXX.XXX.XXX.XXX:XXXX/app?autoReconnect=true"/>
<property name="hibernate.connection.username" value="XXXXX"/>
<property name="hibernate.connection.password" value="XXXXX"/>
<property name="hibernate.generate_statistics" value="true"/>
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.OSCacheProvider"/>
<property name="hibernate.cache.use_second_level_cache" value="true"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.c3p0.min_size" value="5"/>
<property name="hibernate.c3p0.max_size" value="20"/>
<property name="hibernate.c3p0.timeout" value="1800"/>
<property name="hibernate.c3p0.max_statements" value="50"/>
<property name="hibernate.c3p0.idle_test_period" value="300"/>
<property name="c3p0.preferredTestQuery" value="select * from status"/>
<property name="c3p0.testConnectionOnCheckout" value="true"/>
<property name="c3p0.debugUnreturnedConnectionStackTraces" value="true"/>
当应用程序运行并保持空闲40 - 48小时时，我得到数据库连接超时错误。早些时候我遇到了这个问题并通过添加hibernate.c3p0.timeout，hibernate.c3p0.idle_test_period，c3p0.preferredTestQuery，c3p0.testConnectionOnCheckout和＆amp;来解决了这个问题。 c3p0.debugUnreturnedConnectionStackTraces。应用程序运行正常。但现在这个错误重新出现了。
当我查看系统中的日志时，我收到了错误消息。我注意到以下事情 1）我的初始连接池是5.正在增加。 2）随着托管连接的增加，GlobalMaxOnlyStatementCache也显示num连接随着未使用连接数的减少而增加。
我的问题是 - 如果一个语句被缓存，c3p0会将连接释放回池，然后可以测试它是否处于空闲状态并终止？
@Update
以下异常打印在日志中：
07 Aug 2013 01:44:18 550134943 [http-8080-7] DEBUG com.mchange.v2.c3p0.impl.NewPooledConnection - com.mchange.v2.c3p0.impl.NewPooledConnection@1516432 invalidated by Exception.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 149,249,259 milliseconds ago. The last packet sent successfully to the server was 149,249,261 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
at sun.reflect.GeneratedConstructorAccessor39.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3352)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1971)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2151)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2625)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2119)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2281)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
at org.hibernate.loader.Loader.doQuery(Loader.java:697)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
at org.hibernate.loader.Loader.doList(Loader.java:2232)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
at org.hibernate.loader.Loader.list(Loader.java:2124)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:312)
at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1723)
at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165)
at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:175)
at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:88)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:104)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.dal.LoginDataManager.authenticateUser(LoginDataManager.java:117)
at zumigo.businesslogic.LoginManager.login(LoginManager.java:46)
at zumigo.servlets.Authentication.processRequest(Authentication.java:124)
at zumigo.servlets.Authentication.doGet(Authentication.java:354)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3333)
... 50 more
07 Aug 2013 01:44:18 550134943 [http-8080-7] WARN com.mchange.v2.c3p0.impl.NewPooledConnection - [c3p0] A PooledConnection that has already signalled a Connection error is still in use!
Update 2
在日志中，我在启动tomcat时看到以下条目 - 从persistence.xml读取的值;
properties[
hibernate.connection.password: neilsoft
c3p0.testConnectionOnCheckout: true
hibernate.c3p0.idle_test_period: 300
hibernate.cache.use_second_level_cache: true
hibernate.show_sql: true
hibernate.c3p0.max_statements: 50
hibernate.c3p0.timeout: 1800
hibernate.generate_statistics: true
hibernate.c3p0.min_size: 5
hibernate.format_sql: true
hibernate.connection.username: root
c3p0.debugUnreturnedConnectionStackTraces: true
hibernate.connection.driver_class: com.mysql.jdbc.Driver
hibernate.cache.provider_class: org.hibernate.cache.OSCacheProvider
c3p0.preferredTestQuery: select * from status
hibernate.c3p0.max_size: 20
hibernate.connection.provider_class: org.hibernate.connection.C3P0ConnectionProvider
hibernate.dialect: org.hibernate.dialect.MySQLDialect
hibernate.connection.url: jdbc:mysql://10.2.2.236:3306/lbs?autoReconnect=true
]]
c3p0初始值为：
07 Aug 2013 01:46:32 20206 [http-8080-1] INFO org.hibernate.connection.ConnectionProviderFactory - Initializing connection provider: org.hibernate.connection.C3P0ConnectionProvider
07 Aug 2013 01:46:32 20207 [http-8080-1] INFO org.hibernate.connection.C3P0ConnectionProvider - C3P0 using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://ec2-67-202-10-105.compute-1.amazonaws.com:3306/lbs?autoReconnect=true
07 Aug 2013 01:46:32 20207 [http-8080-1] INFO org.hibernate.connection.C3P0ConnectionProvider - Connection properties: {user=XXXX, password=****, autocommit=true, release_mode=auto}
07 Aug 2013 01:46:32 20207 [http-8080-1] INFO org.hibernate.connection.C3P0ConnectionProvider - autocommit mode: true
07 Aug 2013 01:46:32 20217 [http-8080-1] INFO com.mchange.v2.log.MLog - MLog clients using log4j logging.
07 Aug 2013 01:46:32 20434 [http-8080-1] INFO com.mchange.v2.c3p0.C3P0Registry - Initializing c3p0-0.9.1 [built 16-January-2007 14:46:42; debug? true; trace: 10]
07 Aug 2013 01:46:32 20470 [http-8080-1] DEBUG com.mchange.v2.c3p0.management.DynamicPooledDataSourceManagerMBean - MBean: com.mchange.v2.c3p0:type=PooledDataSource[2zreza8wnzkcdpvnjkja|14c7a98] registered.
07 Aug 2013 01:46:32 20535 [http-8080-1] DEBUG com.mchange.v2.c3p0.management.DynamicPooledDataSourceManagerMBean - MBean: com.mchange.v2.c3p0:type=PooledDataSource[2zreza8wnzkcdpvnjkja|14c7a98] unregistered, in order to be reregistered after update.
07 Aug 2013 01:46:32 20535 [http-8080-1] DEBUG com.mchange.v2.c3p0.management.DynamicPooledDataSourceManagerMBean - MBean: com.mchange.v2.c3p0:type=PooledDataSource[2zreza8wnzkcdpvnjkja|14c7a98] registered.
07 Aug 2013 01:46:32 20665 [http-8080-1] INFO com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource - Initializing c3p0 pool... com.mchange.v2.c3p0.PoolBackedDataSource@b5006db1 [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@6724e358 [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, **debugUnreturnedConnectionStackTraces -> true**, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 2zreza8wnzkcdpvnjkja|1c7d56b, **idleConnectionTestPeriod -> 300**, initialPoolSize -> 5, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, m**axIdleTime -> 1800**, maxIdleTimeExcessConnections -> 0, **maxPoolSize -> 20, maxStatements -> 50**, maxStatementsPerConnection -> 0, **minPoolSize -> 5**, nestedDataSource -> com.mchange.v2.c3p0.DriverManagerDataSource@35a58726 [ description -> null, driverClass -> null, factoryClassLocation -> null, identityToken -> 2zreza8wnzkcdpvnjkja|71949b, jdbcUrl -> jdbc:mysql://XXX.XXX.XXX.XXX:XXXX/app?autoReconnect=true, properties -> {user=******, password=******, autocommit=true, release_mode=auto} ], **preferredTestQuery -> select * from status**, propertyCycle -> 0, testConnectionOnCheckin -> false, **testConnectionOnCheckout -> true**, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false; userOverrides: {} ], dataSourceName -> null, factoryClassLocation -> null, identityToken -> 2zreza8wnzkcdpvnjkja|14c7a98, numHelperThreads -> 3 ]
07 Aug 2013 01:46:32 20713 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - incremented pending_acquires: 1
07 Aug 2013 01:46:32 20713 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - incremented pending_acquires: 2
07 Aug 2013 01:46:32 20713 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - incremented pending_acquires: 3
07 Aug 2013 01:46:32 20713 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - incremented pending_acquires: 4
07 Aug 2013 01:46:32 20713 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - incremented pending_acquires: 5
07 Aug 2013 01:46:32 20738 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - **com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 config: [start -> 5; min -> 5; max -> 20; inc -> 3; num_acq_attempts -> 30; acq_attempt_delay -> 1000; check_idle_resources_delay -> 300000; mox_resource_age -> 0; max_idle_time -> 1800000; excess_max_idle_time -> 0; destroy_unreturned_resc_time -> 0; expiration_enforcement_delay -> 450000; break_on_acquisition_failure -> false; debug_store_checkout_exceptions -> false]**
07 Aug 2013 01:46:32 20738 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - acquire test -- pool size: 0; target_pool_size: 5; desired target? 1
07 Aug 2013 01:46:32 20738 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - awaitAvailable(): [unknown]
07 Aug 2013 01:46:32 20738 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 0, unused: 0, excluded: 0]
07 Aug 2013 01:46:32 20782 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:32 20782 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:32 20782 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager@320399.acquireResource() returning.
07 Aug 2013 01:46:32 20783 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 1, unused: 1, excluded: 0]
07 Aug 2013 01:46:32 20783 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - decremented pending_acquires: 4
07 Aug 2013 01:46:32 20784 [http-8080-1] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - Testing PooledConnection [com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f] on CHECKOUT.
07 Aug 2013 01:46:32 20783 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager@320399.acquireResource() returning.
07 Aug 2013 01:46:32 20787 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 2, unused: 1, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:32 20787 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - decremented pending_acquires: 3
07 Aug 2013 01:46:32 20789 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:32 20790 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager@320399.acquireResource() returning.
07 Aug 2013 01:46:32 20790 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:32 20790 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - decremented pending_acquires: 2
07 Aug 2013 01:46:33 20843 [http-8080-1] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:33 20843 [http-8080-1] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - Test of PooledConnection [com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f] on CHECKOUT has SUCCEEDED.
07 Aug 2013 01:46:33 20843 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 3, unused: 2, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:33 20848 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:33 20848 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager@320399.acquireResource() returning.
07 Aug 2013 01:46:33 20848 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 4, unused: 3, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:33 20848 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - decremented pending_acquires: 1
07 Aug 2013 01:46:33 20850 [http-8080-1] INFO org.hibernate.cfg.SettingsFactory - RDBMS: MySQL, version: 5.1.49-1ubuntu8
07 Aug 2013 01:46:33 20850 [http-8080-1] INFO org.hibernate.cfg.SettingsFactory - JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-5.1.16 ( Revision: ${bzr.revision-id} )
07 Aug 2013 01:46:33 20852 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:33 20852 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool - com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager@320399.acquireResource() returning.
07 Aug 2013 01:46:33 20852 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 5, unused: 4, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:33 20852 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - decremented pending_acquires: 0
07 Aug 2013 01:46:33 20915 [http-8080-1] INFO org.hibernate.dialect.Dialect - Using dialect: org.hibernate.dialect.MySQLDialect
07 Aug 2013 01:46:33 20917 [http-8080-1] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0
07 Aug 2013 01:46:33 20918 [http-8080-1] DEBUG com.mchange.v2.resourcepool.BasicResourcePool - trace com.mchange.v2.resourcepool.BasicResourcePool@5e9f1 [managed: 5, unused: 4, excluded: 0] (e.g. com.mchange.v2.c3p0.impl.NewPooledConnection@1ed688f)
07 Aug 2013 01:46:33 20918 [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] DEBUG com.mchange.v2.c3p0.stmt.GooGooStatementCache - checkinAll(): com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache stats -- total size: 0; checked out: 0; num connections: 0; num keys: 0