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java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.	at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2957)	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3375)	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3365)	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3805)	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478)	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625)	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2547)	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4874)	at com.mchange.v2.c3p0.impl.NewProxyConnection.setAutoCommit(NewProxyConnection.java:1059)	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:72)	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162)	at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435)	at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:61)	at com.google.inject.persist.jpa.JpaLocalTxnInterceptor.invoke(JpaLocalTxnInterceptor.java:62)	at org.traccar.web.server.model.ScheduledTask.run(ScheduledTask.java:35)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)