com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1035079 -- APPARENT DEADLOCK!!! Complete Status:

com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1035079 -- APPARENT DEADLOCK!!! Complete Status:
    Managed Threads: 3
    Active Threads: 3
    Active Tasks:
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@b1cc87 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@eaf40c (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@13c6641 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
    Pending Tasks:
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@5d391d
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@50a649
Pool thread stack traces:
    Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main]
        java.net.PlainSocketImpl.socketConnect(Native Method)
        java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
        java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
        java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
        java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        java.net.Socket.connect(Socket.java:529)
        java.net.Socket.connect(Socket.java:478)
        java.net.Socket.<init>(Socket.java:375)
        java.net.Socket.<init>(Socket.java:218)
        com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253)
        com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
        com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2026)
        com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
        com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        sun.reflect.GeneratedConstructorAccessor10.newInstance(Unknown Source)
        sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
        com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
        com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
        com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
        com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
        com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
        com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
        com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
        com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
    Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main]
        java.net.PlainSocketImpl.socketConnect(Native Method)
        java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
        java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
        java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
        java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        java.net.Socket.connect(Socket.java:529)
        java.net.Socket.connect(Socket.java:478)
        java.net.Socket.<init>(Socket.java:375)
        java.net.Socket.<init>(Socket.java:218)
        com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253)
        com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
        com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2026)
        com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
        com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        sun.reflect.GeneratedConstructorAccessor10.newInstance(Unknown Source)
        sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

通常是由于应用服务器连接不到数据库造成的，检查c3p0的配置文件，确保连接到数据库！！！！