Hibernate 3.4 と c3p0 0.9.1 を使用しているアプリケーションがあります。データベース接続のタイムアウト エラーに直面しています。
私の Persistence.xml ファイルは
<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"/>
アプリケーションを実行して 40 ～ 48 時間アイドル状態にすると、データベース接続のタイムアウト エラーが発生します。以前にこの問題に直面し、 , , , , & を追加してhibernate.c3p0.timeout解決hibernate.c3p0.idle_test_periodしc3p0.preferredTestQueryましc3p0.testConnectionOnCheckoutたc3p0.debugUnreturnedConnectionStackTraces。そして、アプリケーションは正常に機能していました。しかし、今、エラーが再発しました。
エラーが発生しているシステムのログを調べたとき。次のことに気付きました 1) 私の初期接続プールは 5 です。これは増加しています。2) また、管理された接続の増加に伴い、GlobalMaxOnlyStatementCache は、未使用の接続の数が減少するにつれて接続数が増加していることも示しています。
私の質問は - ステートメントがキャッシュされている場合、c3p0 は接続を解放してプールに戻し、アイドル状態をテストして終了することができますか?
@Update
次の例外がログに出力されます。
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
ログには、Tomcat の起動時に次のエントリが表示されます。値は persistence.xml から読み取られます。
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 の初期値は次のとおりです。
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