HTTP Status 500 – Internal Server Error


Type Exception Report

Message javax.servlet.ServletException: com.mysql.cj.jdbc.exceptions.CommunicationsException: The last packet successfully received from the server was 48,287,005 milliseconds ago. The last packet sent successfully to the server was 48,287,006 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.

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: javax.servlet.ServletException: com.mysql.cj.jdbc.exceptions.CommunicationsException: The last packet successfully received from the server was 48,287,005 milliseconds ago. The last packet sent successfully to the server was 48,287,006 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.
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:96)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:15)
	pvgoran.servlet.subjectdriven.SubjectDrivenServletBase.service(SubjectDrivenServletBase.java:89)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Root Cause

javax.servlet.ServletException: com.mysql.cj.jdbc.exceptions.CommunicationsException: The last packet successfully received from the server was 48,287,005 milliseconds ago. The last packet sent successfully to the server was 48,287,006 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.
	ktvapp.KtvApplicationContext.<init>(KtvApplicationContext.java:128)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:94)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:15)
	pvgoran.servlet.subjectdriven.SubjectDrivenServletBase.service(SubjectDrivenServletBase.java:89)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Root Cause

com.mysql.cj.jdbc.exceptions.CommunicationsException: The last packet successfully received from the server was 48,287,005 milliseconds ago. The last packet sent successfully to the server was 48,287,006 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.
	com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:175)
	com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:916)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:972)
	sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:118)
	com.sun.proxy.$Proxy14.executeQuery(Unknown Source)
	pvgoran.dataaccess.InstancefulDAO.executeSelectGetString(InstancefulDAO.java:850)
	logic.dao.UserDAO.getRolePermissions(UserDAO.java:81)
	ktvapp.KtvApplicationContext.<init>(KtvApplicationContext.java:124)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:94)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:15)
	pvgoran.servlet.subjectdriven.SubjectDrivenServletBase.service(SubjectDrivenServletBase.java:89)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Root Cause

com.mysql.cj.exceptions.CJCommunicationsException: The last packet successfully received from the server was 48,287,005 milliseconds ago. The last packet sent successfully to the server was 48,287,006 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.
	sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:62)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
	com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:150)
	com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:166)
	com.mysql.cj.protocol.a.NativeProtocol.send(NativeProtocol.java:629)
	com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:684)
	com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:1052)
	com.mysql.cj.NativeSession.execSQL(NativeSession.java:657)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:893)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:972)
	sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:118)
	com.sun.proxy.$Proxy14.executeQuery(Unknown Source)
	pvgoran.dataaccess.InstancefulDAO.executeSelectGetString(InstancefulDAO.java:850)
	logic.dao.UserDAO.getRolePermissions(UserDAO.java:81)
	ktvapp.KtvApplicationContext.<init>(KtvApplicationContext.java:124)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:94)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:15)
	pvgoran.servlet.subjectdriven.SubjectDrivenServletBase.service(SubjectDrivenServletBase.java:89)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Root Cause

java.net.SocketException: Connection reset
	java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:115)
	java.net.SocketOutputStream.write(SocketOutputStream.java:155)
	java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
	java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
	com.mysql.cj.protocol.a.SimplePacketSender.send(SimplePacketSender.java:55)
	com.mysql.cj.protocol.a.TimeTrackingPacketSender.send(TimeTrackingPacketSender.java:50)
	com.mysql.cj.protocol.a.NativeProtocol.send(NativeProtocol.java:620)
	com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:684)
	com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:1052)
	com.mysql.cj.NativeSession.execSQL(NativeSession.java:657)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:893)
	com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:972)
	sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:118)
	com.sun.proxy.$Proxy14.executeQuery(Unknown Source)
	pvgoran.dataaccess.InstancefulDAO.executeSelectGetString(InstancefulDAO.java:850)
	logic.dao.UserDAO.getRolePermissions(UserDAO.java:81)
	ktvapp.KtvApplicationContext.<init>(KtvApplicationContext.java:124)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:94)
	ktvapp.KtvServlet.getApplicationContext(KtvServlet.java:15)
	pvgoran.servlet.subjectdriven.SubjectDrivenServletBase.service(SubjectDrivenServletBase.java:89)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/9.0.75