我有使用 hirbernate 的重载 java 应用程序。而且我曾经用作连接池 DBCP,但它存在连接丢失的问题。比我切换到c3p0。但现在它有时会阻塞线程,我不知道为什么。像这儿:
"1343694829@qtp-515693101-1941" prio=10 tid=0x00007fa6b0940000 nid=0x4e12 runnable [0x00007fa6f8f1c000]
java.lang.Thread.State: RUNNABLE
at com.mchange.v2.resourcepool.BasicResourcePool.doCheckinManaged(BasicResourcePool.java:1258)
at com.mchange.v2.resourcepool.BasicResourcePool.checkinResource(BasicResourcePool.java:647)
- locked <0x00007fa7286d9728> (a com.mchange.v2.resourcepool.BasicResourcePool)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$ConnectionEventListenerImpl.doCheckinResource(C3P0PooledConnectionPool.java:636)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$ConnectionEventListenerImpl.connectionClosed(C3P0PooledConnectionPool.java:630)
at com.mchange.v2.c3p0.util.ConnectionEventSupport.fireConnectionClosed(ConnectionEventSupport.java:55)
at com.mchange.v2.c3p0.impl.NewPooledConnection.fireConnectionClosed(NewPooledConnection.java:510)
at com.mchange.v2.c3p0.impl.NewPooledConnection.markClosedProxyConnection(NewPooledConnection.java:381)
at com.mchange.v2.c3p0.impl.NewProxyConnection.close(NewProxyConnection.java:1246)
- locked <0x00007fa794ccf020> (a com.mchange.v2.c3p0.impl.NewProxyConnection)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.closeConnection(LocalDataSourceConnectionProvider.java:96)
at org.hibernate.jdbc.ConnectionManager.closeConnection(ConnectionManager.java:474)
at org.hibernate.jdbc.ConnectionManager.cleanup(ConnectionManager.java:408)
at org.hibernate.jdbc.ConnectionManager.close(ConnectionManager.java:347)
at org.hibernate.impl.SessionImpl.close(SessionImpl.java:325)
at org.springframework.orm.hibernate3.SessionFactoryUtils.closeSession(SessionFactoryUtils.java:791)
at org.springframework.orm.hibernate3.SessionFactoryUtils.closeSessionOrRegisterDeferredClose(SessionFactoryUtils.java:777)
at org.springframework.orm.hibernate3.SessionFactoryUtils.releaseSession(SessionFactoryUtils.java:755)
' 我的堆栈跟踪转储显示该线程阻塞了我的所有其他线程,锁定 <0x00007fa7286d9728>,因此在一段时间内服务器被完全阻塞。我不确定这个线程运行了多长时间,如果一个线程长时间阻塞所有其他线程,或者这个线程消耗的时间非常长,但结果是,我的系统被完全阻塞并且非常慢。我google了很多,但我不知道如何解决这个问题。我需要池来关闭连接并尽快完成踩踏。我应该使用其他连接池吗?对我来说,这个池库绝对有必要 100% 保存,没有死锁、生命锁、饥饿,即使它比其他库慢一点。
谢谢你的帮助