Monitoring JavaMelody on /SapphireIMS

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Request	Mean time (ms)	Max time (ms)	Standard deviation	Mean cpu time (ms)	% of system error
WARN [org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory] IJ030027: Destroying connection that is not valid, due to the following exception: com.mysql.jdbc.JDBC4Connection@38f9676f	-1	0	0		100.00

Stack-trace
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 4,469,733 milliseconds ago. The last packet sent successfully to the server was 17,006 milliseconds ago.
      at sun.reflect.GeneratedConstructorAccessor405.newInstance(Unknown Source)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
      at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
      at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116)
      at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3102)
      at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2991)
      at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3532)
      at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)
      at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)
      at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)
      at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
      at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:842)
      at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:681)
      at org.jboss.jca.adapters.jdbc.CheckValidConnectionSQL.isValidConnection(CheckValidConnectionSQL.java:74)
      at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.isValidConnection(BaseWrapperManagedConnectionFactory.java:1273)
      at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.getInvalidConnections(BaseWrapperManagedConnectionFactory.java:1086)
      at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:379)
      at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:632)
      at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:604)
      at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:624)
      at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:430)
      at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:789)
      at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)
      at sun.reflect.GeneratedMethodAccessor184.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at net.bull.javamelody.JdbcWrapper$3.invoke(JdbcWrapper.java:804)
      at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:300)
      at com.sun.proxy.$Proxy179.getConnection(Unknown Source)
      at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:64)
      at IMSPackage.connection.getConnection(connection.java:51)
      at IMSPackage.MailServlet.postMail(MailServlet.java:189)
      at sapphire.reports.AutoMailerWorkerThread.processAutoMailer(AutoMailerWorkerThread.java:69)
      at sapphire.reports.AutoMailerWorkerThread.run(AutoMailerWorkerThread.java:55)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketException: Unrecognized Windows Sockets error: 0: recv failed
      at java.net.SocketInputStream.socketRead0(Native Method)
      at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
      at java.net.SocketInputStream.read(SocketInputStream.java:171)
      at java.net.SocketInputStream.read(SocketInputStream.java:141)
      at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
      at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
      at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
      at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2549)
      at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3002)
      ... 32 more