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RCP 2022-03 and Java17 suffer from Eclipse bug #578221

See Eclipse bug 578221.

The problem causes the Eclipse help system to produce this page:

HTTP ERROR 500 org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6197: An error occurred at line: 41 in the jsp file: /index.jsp PWC6199: Generated servlet error: System cannot be resolved
URI:	/help/index.jsp
STATUS:	500
MESSAGE:	org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6197: An error occurred at line: 41 in the jsp file: /index.jsp PWC6199: Generated servlet error: System cannot be resolved
SERVLET:	org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet-59574129
CAUSED BY:	org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP PWC6197: An error occurred at line: 41 in the jsp file: /index.jsp PWC6199: Generated servlet error: System cannot be resolved
Caused by:

org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP

PWC6197: An error occurred at line: 41 in the jsp file: /index.jsp
PWC6199: Generated servlet error:
System cannot be resolved


	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:584)
	at org.eclipse.equinox.jsp.jasper.JspServlet.service(JspServlet.java:164)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:584)
	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:1457)
	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:118)
	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:584)
	at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:308)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:508)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1571)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1372)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:463)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1544)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1294)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at org.eclipse.jetty.server.Server.handle(Server.java:562)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:406)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:663)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:398)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:319)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at org.eclipse.jetty.io.SocketChannelEndPoint$1.run(SocketChannelEndPoint.java:101)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:412)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:381)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:268)
	at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:190)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:894)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1038)
	at java.base/java.lang.Thread.run(Thread.java:833)

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There is a workaround, which is to include org.eclipse.jdt.core (another 6-7 MB) to the product. I tested this to work.

The better fix would probably be to update the RCP once again.