Facing the same issue again "Unable to process the request"
Following is the Tomcat log file:-
2015-01-21 13:17:11 Commons Daemon procrun stderr initialized
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.0.15
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Nov 2 2014 19:25:20 UTC
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.0.15.0
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Windows 7
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 6.1
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JAVA_HOME: C:\Program Files\Java\jre1.8.0_25
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_25-b18
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: C:\Program Files\Apache Software Foundation\Tomcat 8.0
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: C:\Program Files\Apache Software Foundation\Tomcat 8.0
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat 8.0
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=C:\Program Files\Apache Software Foundation\Tomcat 8.0
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.endorsed.dirs=C:\Program Files\Apache Software Foundation\Tomcat 8.0\endorsed
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=C:\Program Files\Apache Software Foundation\Tomcat 8.0\temp
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=C:\Program Files\Apache Software Foundation\Tomcat 8.0\conf\logging.properties
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: exit
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xms128m
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmx256m
21-Jan-2015 13:17:12.465 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;.;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x86;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x64;C:\HibLib\mysql-connector-java-5.1.34-bin.jar;C:\Program Files\Java\jdk1.8.0_25\bin;C:\Program Files\Java\jre1.8.0_25;C:\Program Files (x86)\Windows Live\Shared;;.
21-Jan-2015 13:17:12.636 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-9090"]
21-Jan-2015 13:17:12.699 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
21-Jan-2015 13:17:12.714 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]
21-Jan-2015 13:17:12.714 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
21-Jan-2015 13:17:12.714 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 728 ms
21-Jan-2015 13:17:12.746 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina
21-Jan-2015 13:17:12.746 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.15
21-Jan-2015 13:17:12.746 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\docs
21-Jan-2015 13:17:13.136 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\docs has finished in 390 ms
21-Jan-2015 13:17:13.136 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\examples
21-Jan-2015 13:17:13.744 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\examples has finished in 608 ms
21-Jan-2015 13:17:13.744 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\First
21-Jan-2015 13:17:13.775 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\First has finished in 31 ms
21-Jan-2015 13:17:13.775 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\host-manager
21-Jan-2015 13:17:13.822 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\host-manager has finished in 47 ms
21-Jan-2015 13:17:13.822 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\Login
21-Jan-2015 13:17:13.994 INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
21-Jan-2015 13:17:13.994 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\Login has finished in 172 ms
21-Jan-2015 13:17:13.994 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\manager
21-Jan-2015 13:17:14.025 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\manager has finished in 31 ms
21-Jan-2015 13:17:14.025 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\ROOT
21-Jan-2015 13:17:14.040 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\ROOT has finished in 15 ms
21-Jan-2015 13:17:14.040 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-9090"]
21-Jan-2015 13:17:14.056 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
21-Jan-2015 13:17:14.072 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 1356 ms
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after statement closed.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.Util.getInstance(Util.java:360)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:924)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:870)
at com.mysql.jdbc.StatementImpl.checkClosed(StatementImpl.java:445)
at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:3951)
at demoServlet.LoginServlet.doPost(LoginServlet.java:50)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1556)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1513)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Please help!!!