Communication link failure issue

We faced communication link failure issue in app server. Connection disconnected from app to db server for 5 mins and reconnected due to communication link failure. Pls suggest what will be the issue. DB Server - wait_timeout is 10 Mins. Pls find the below logs Apr 6, 2014 1:42:38 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [-dispatcher-servlet] in context with path threw exception javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Communications link failure The last packet successfully received from the server was 300,144 milliseconds ago. The last packet sent successfully to the server was 300,144 milliseconds ago. at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1377) at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1300) at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:273) at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:310) at $Proxy73.getResultList(Unknown Source) at c.dao.user.UserDAO.getPropertyAssociates(UserDAO.java:61) he last packet successfully received from the server was 300,151 milliseconds ago. The last packet sent successfully to the server was 300,150 milliseconds ago. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3589) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3478) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4019) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322) at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122) ... 60 more Caused by: java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) 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:3036) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3489) ... 71 more Apr 3, 2014 1:42:38 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet dispatcher-servlet] in context with path [] threw exception javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Communications link failure The last packet successfully received from the server was 300,140 milliseconds ago. The last packet sent successfully to the server was 300,140 milliseconds ago. at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1377) at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1300) at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:273) at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)