I have made a notelog web project using tomcat as server in Netbeans IDE. It was working fine until couple of days ago, even though I hadn't changed anything, it started showing error. Whenever I run my notelog and then try to sign in through heresign in page, it shows me this error error during sign in`HTTP Status 500 – Internal Server Error Type Exception Report
Message Error instantiating servlet class [com.ronak.signin]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
javax.servlet.ServletException: Error instantiating servlet class [com.ronak.signin] org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.base/java.lang.Thread.run(Thread.java:832) Root Cause
java.lang.RuntimeException:
com.ronak.signin.(signin.java:1)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.base/java.lang.Thread.run(Thread.java:832)
Note The full stack trace of the root cause is available in the server logs.. I have also tried to clean and build but it shows this error [error: option -Xbootclasspath/p: not allowed with target 15][3] ant -f C:\Java\Notelog -Dnb.internal.action.name=rebuild -DforceRedeploy=false -Dbrowser.context=C:\Java\Notelog clean dist
init:
undeploy-clean:
Undeploying ...
undeploy?path=/Notelog
OK - Undeployed application at context path [/Notelog]
deps-clean:
do-clean:
Deleting directory C:\Java\Notelog\build
check-clean:
clean:
init:
deps-module-jar:
deps-ear-jar:
deps-jar:
Created dir: C:\Java\Notelog\build\web\WEB-INF\classes
Created dir: C:\Java\Notelog\build\web\META-INF
Copying 1 file to C:\Java\Notelog\build\web\META-INF
Copying 15 files to C:\Java\Notelog\build\web
library-inclusion-in-archive:
library-inclusion-in-manifest:
Created dir: C:\Java\Notelog\build\empty
Created dir: C:\Java\Notelog\build\generated-sources\ap-source-output
Compiling 8 source files to C:\Java\Notelog\build\web\WEB-INF\classes
error: option -Xbootclasspath/p: not allowed with target 15
BUILD FAILED (total time: 0 seconds)
` This is my signin.jsp code signin.jsp and this is my signin servlet enter image description here. I have tried many solutions but still am not able to get it to work. Any help will be welcome.
Got it to work. First I thought it was a IDE problem so I changed my IDE and made another project in eclipse. At first the project worked but next day I encountered the same problem, so then I realised that this problem only occured when I tried to sign in.. And the only thing different in the sign servlet was that it used mysql. So then I deleted my mysql connector and downloaded it again. This solved my problem. So connector jar file must have somehow gotten corrupted. Although thank you to everyone who answered.