Getting JDBC Connection exception... what is the problem?

[Kalle Blomqvist]

I have connection problem and I get the following... Do you have any idea what it might be? Many thanks.

 [java] org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
     [java] The last packet successfully received from the server was 81 milliseconds ago.  The last packet sent successfully to the server was 81 milliseconds ago.
     [java] 	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:82)
     [java] 	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:577)
     [java] 	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:641)
     [java] 	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:666)
     [java] 	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:698)
     [java] 	at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:133)
     [java] 	at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:137)
     [java] 	at se.kth.ite.mss.KurserUtil.getSenasteValdaKurser(KurserUtil.java:71)
     [java] 	at org.apache.jsp.minasidor.kurser.nyaKurser_jsp._jspService(nyaKurser_jsp.java:91)
     [java] 	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
     [java] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
     [java] 	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
     [java] 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
     [java] 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
     [java] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
     [java] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     [java] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     [java] 	at se.kth.ite.portal.ContextLoggingFilter.doFilter(ContextLoggingFilter.java:53)
     [java] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     [java] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     [java] 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     [java] 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     [java] 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     [java] 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     [java] 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     [java] 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
     [java] 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
     [java] 	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
     [java] 	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
     [java] 	at java.lang.Thread.run(Thread.java:680)
     [java] Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
     [java] The last packet successfully received from the server was 81 milliseconds ago.  The last packet sent successfully to the server was 81 milliseconds ago.
     [java] 	at sun.reflect.GeneratedConstructorAccessor50.newInstance(Unknown Source)
     [java] 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     [java] 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     [java] 	at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
     [java] 	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1118)
     [java] 	at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:107)
     [java] 	at com.mysql.jdbc.MysqlIO.negotiateSSLConnection(MysqlIO.java:4553)
     [java] 	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1330)
     [java] 	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2312)
     [java] 	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2122)
     [java] 	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:774)
     [java] 	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:49)
     [java] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     [java] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     [java] 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     [java] 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     [java] 	at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
     [java] 	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:375)
     [java] 	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:289)
     [java] 	at java.sql.DriverManager.getConnection(DriverManager.java:582)
     [java] 	at java.sql.DriverManager.getConnection(DriverManager.java:185)
     [java] 	at org.apache.commons.dbcp.cpdsadapter.DriverAdapterCPDS.getPooledConnection(DriverAdapterCPDS.java:205)
     [java] 	at org.apache.commons.dbcp.cpdsadapter.DriverAdapterCPDS.getPooledConnection(DriverAdapterCPDS.java:150)
     [java] 	at org.apache.commons.dbcp.datasources.InstanceKeyDataSource.testCPDS(InstanceKeyDataSource.java:836)
     [java] 	at org.apache.commons.dbcp.datasources.SharedPoolDataSource.registerPool(SharedPoolDataSource.java:210)
     [java] 	at org.apache.commons.dbcp.datasources.SharedPoolDataSource.getPooledConnectionAndInfo(SharedPoolDataSource.java:169)
     [java] 	at org.apache.commons.dbcp.datasources.InstanceKeyDataSource.getConnection(InstanceKeyDataSource.java:701)
     [java] 	at org.apache.commons.dbcp.datasources.InstanceKeyDataSource.getConnection(InstanceKeyDataSource.java:676)
     [java] 	at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:113)
     [java] 	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
     [java] 	... 29 more
     [java] Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     [java] 	at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
     [java] 	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1764)
     [java] 	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:241)
     [java] 	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:235)
     [java] 	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1206)
     [java] 	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)
     [java] 	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
     [java] 	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
     [java] 	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:958)
     [java] 	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1203)
     [java] 	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1230)
     [java] 	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1214)
     [java] 	at com.mysql.jdbc.ExportControlled.transformSocketToSSLSocket(ExportControlled.java:92)
     [java] 	... 53 more
     [java] Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     [java] 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:323)
     [java] 	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:217)
     [java] 	at sun.security.validator.Validator.validate(Validator.java:218)
     [java] 	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
     [java] 	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
     [java] 	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
     [java] 	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1185)
     [java] 	... 61 more
     [java] Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     [java] 	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
     [java] 	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
     [java] 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:318)
     [java] 	... 67 more