21:37:08,815 DEBUG BasicResourcePool:1831 - An exception occurred while acquiring a poolable resource. Will retry.

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

    at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)

    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1137)

    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:355)

    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2490)

    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2527)

    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2309)

    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)

    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

    at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)

    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:419)

    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)

    at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)

    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)

    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)

    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)

    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)

    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)

    at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)

    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)

Caused by: java.net.ConnectException: Connection refused: connect

    at java.net.DualStackPlainSocketImpl.connect0(Native Method)

    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)

    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)

    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

    at java.net.Socket.connect(Socket.java:579)

    at java.net.Socket.connect(Socket.java:528)

    at java.net.Socket.<init>(Socket.java:425)

    at java.net.Socket.<init>(Socket.java:241)

    at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:258)

    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:305)

    ... 20 more

21:37:08,815 DEBUG BasicResourcePool:1831 - An exception occurred while acquiring a poolable resource. Will retry.

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

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