Develop Reference

Eclipse RCP help broken after update of 4.12

I have updated an eclipse rich client platform product from version 4.4.2 to 4.12. All is working fine expect the help. I get an 500 error. Its the help which uses an internal jetty-server.
Strangely the context-help and help-search is working fine. I found out the help is working fine till Eclipse rcp 4.7.3. After version 4.7.3 is it broken for all other versions.
I´m not sure what is the problem. How can I find the cause of this? I added the stack trace of the help.
HTTP ERROR 500 org.apache.jasper.JasperException:
PWC6033: Error in Javac compilation for JSP
PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp
PWC6199: Generated servlet error: SearchData cannot be resolved to a type
PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp
PWC6199: Generated servlet error: SearchData cannot be resolved to a type
URI:
/help/advanced/tocView.jsp
STATUS:
500
MESSAGE:
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp PWC6199: Generated servlet error: SearchData cannot be resolved to a type PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp PWC6199: Generated servlet error: SearchData cannot be resolved to a type
SERVLET:
org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet-246bbda0
CAUSED BY:
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp PWC6199: Generated servlet error: SearchData cannot be resolved to a type PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp PWC6199: Generated servlet error: SearchData cannot be resolved to a type
Caused by:
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP
PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp
PWC6199: Generated servlet error:
SearchData cannot be resolved to a type
PWC6197: An error occurred at line: 16 in the jsp file: /advanced/tocView.jsp
PWC6199: Generated servlet error:
SearchData cannot be resolved to a type
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:129)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:299)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:392)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:453)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.equinox.jsp.jasper.JspServlet.service(JspServlet.java:164)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.equinox.http.registry.internal.ServletManager$ServletWrapper.service(ServletManager.java:183)
at org.eclipse.equinox.http.servlet.internal.HttpServiceRuntimeImpl$LegacyServlet.service(HttpServiceRuntimeImpl.java:1447)
at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:159)
at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:67)
at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:117)
at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.dispatch(ProxyServlet.java:147)
at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.preprocess(ProxyServlet.java:115)
at org.eclipse.equinox.http.servlet.internal.servlet.ProxyServlet.service(ProxyServlet.java:104)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:306)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:760)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:547)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1607)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1577)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:500)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Thread.java:834)```

An error occurred at line: [14] in the generated java file: Only a type can be imported. sito.progettoweb resolves to a package

I need help!
I am trying to import a java class into some jsp files. eclipse compiles correctly, but when I start the program I get this error message:
Type Exception Report
Message Unable to compile class for JSP:
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [14] in the generated java file: [C:\xampp\tomcat\work\Catalina\localhost\examples\org\apache\jsp\webproject\WebContent\index_jsp.java]
Only a type can be imported. sito.progettoweb resolves to a package
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:536)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:379)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:660)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

unable to compile jsp class

**HTTP Status 500 - Unable to compile class for JSP: **
type Exception report
message Unable to compile class for JSP:
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [14] in the generated java file: [/usr/local/easy/share/easy-tomcat7/work/Catalina/paykar.co.in/jsp/org/apache/jsp/rechargeMobile_jsp.java]
Only a type can be imported. com.RechargeMobile resolves to a package
An error occurred at line: [15] in the generated java file: [/usr/local/easy/share/easy-tomcat7/work/Catalina/paykar.co.in/jsp/org/apache/jsp/rechargeMobile_jsp.java]
Only a type can be imported. com.MobileInfo resolves to a package
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:463)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.42 logs.

There is a wrong import in your JSP file.
There is a clear message in your logs:
An error occurred at line: [14] in the generated java file:
[/usr/local/easy/share/easy-tomcat7/work/Catalina/paykar.co.in/jsp/org/apache/jsp/rechargeMobile_jsp.java]
Only a type can be imported. com.RechargeMobile resolves to a package
This means that you should have a line like following:
<%# page import="com.MobileInfo" %>
But this is a package and not a class.
Try to change it as follow for importing a package:
<%# page import="com.MobileInfo.*" %>
Otherwhise change ir as follow for importing spacific class you need:
<%# page import="com.MobileInfo.YourClassName" %>

Unable to compile jsp on server

when i run my jsp at local host it works fine but when i run at server it show me the error.
I have post the error below. Please help me out.
HTTP Status 500 - Unable to compile class for JSP:
type Exception report
message Unable to compile class for JSP:
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [14] in the generated java file: [/var/lib/tomcat7/work/Catalina/localhost/UploadFile/org/apache/jsp/Jsp/ReviewQuestions_jsp.java]
Only a type can be imported. javax.websocket.Session resolves to a package
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:468)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.52 (Ubuntu) logs.
Apache Tomcat/7.0.52 (Ubuntu)

HTTP Status 500 - Unable to compile class for JSP: in Eclipse Luna

I have a Login.jsp page.When I try to run it on server I get the following error:
type Exception report
message Unable to compile class for JSP:
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [1] in the generated java file:
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:468)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.
What causes this error?

I found the solution I changed from Apache 7 to Apache 8 now things are working fine !