org.hibernate.transaction.JDBCTransaction

Programação
,
#1

Galera, minha aplicação esta tendo esse erro todos os dias … Alguem tem ideia de como posso resolver isso ?

253407356 [ajp-bio-127.0.0.1-13442-exec-43] ERROR org.hibernate.transaction.JDBCTransaction - JDBC begin failed
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 173.040.936 milliseconds ago.  The last packet sent successfully to the server was 173.040.936 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3938)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2551)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2809)
	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5333)
	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:91)
	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463)
	at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:60)
	at br.com.aciex.filter.ControleFiltro.doFilter(ControleFiltro.java:33)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:957)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
	at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketException: Pipe quebrado
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
	at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
	at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3919)
	... 28 more
#2

me parece que vc abre a conexão e uma hora a conexão é perdida

siga a recomendação

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 173.040.936 milliseconds ago. The last packet sent successfully to the server was 173.040.936 milliseconds ago. is longer than the server configured value of ‘wait_timeout’. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property ‘autoReconnect=true’ to avoid this problem.

autoReconnect=true

#3 
<properties>    
           	<!-- CONFIGURAÇÃO JPA/HIBERNATE -->
           	        <property name="hibernate.dialect"		 value="org.hibernate.dialect.MySQL5InnoDBDialect" />
			<property name="hibernate.hbm2ddl.auto"		 value="update"									   />
			<property name="javax.persistence.jdbc.driver"   value="com.mysql.jdbc.Driver"					   />
			<property name="javax.persistence.jdbc.user" 	 value="root"							   />
			<property name="javax.persistence.jdbc.password" value="root"					   		   />
			<property name="javax.persistence.jdbc.url" 	 value="jdbc:mysql://localhost:3306/desafi_mafra?autoReconnect=true" />
			    	
		   <!--Configuração do pool de c3p0         -->
		    <property name="c3p0.acquire_increment" 	     value="1"	 /> 
		    <property name="hibernate.c3p0.min_size"	     value="10"  />
		    <property name="hibernate.c3p0.max_size" 	     value="50"  />
		    <property name="hibernate.c3p0.timeout" 	     value="144000"/>
		    <property name="hibernate.c3p0.max_statements"   value="50"  />
		</properties>