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)
1.数据库服务没有启动
以上出现的错误就是我在关闭了自己机器上的mysqld后亲测的一个错误，我的机器上的mysql服务器是默认开启的，但是由于将jar包给同时后，他的机器上其实是没有mysql的，所以会出现错误
2.没有创建对应数据库
在mysql开启的情况下，没有对应数据库的情况下也是会出现这样的问题的
3.就涉及到c3p0连接池的配置文件了,检查c3p0配置文件，ip,端口和数据库名是否配置错误
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作者：萌萌的卡洛奇
来源：CSDN
原文：https://blog.csdn.net/yuzhongzi81/article/details/41806411
版权声明：本文为博主原创文章，转载请附上博文链接！