deleting a deleted project should lead to 404 HTTP error

[vladak]

When deleting a project which was already deleted, the client got 500 Server Error and Tomcat log had this exception:

10-Feb-2025 15:46:59.167 WARNING [http-nio-8080-exec-80] org.opengrok.web.api.error.GenericExceptionMapper.toResponse Exception while processing request
        java.lang.IllegalStateException: cannot get project "linux"
                at org.opengrok.web.api.v1.controller.ProjectsController.disableProject(ProjectsController.java:168)
                at org.opengrok.web.api.v1.controller.ProjectsController.deleteProject(ProjectsController.java:183)
                at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
                at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                at java.base/java.lang.reflect.Method.invoke(Method.java:566)
                at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
                at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:146)
                at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:189)
                at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:176)
                at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:93)
                at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:478)
                at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:400)
                at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
                at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:274)
                at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
                at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
                at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:266)
                at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:253)
                at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:696)
                at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
                at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
                at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:358)
                at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:312)
                at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
                at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
                at org.opengrok.web.CookieFilter.doFilter(CookieFilter.java:50)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
                at org.opengrok.web.AuthorizationFilter.doFilter(AuthorizationFilter.java:100)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
                at org.opengrok.web.StatisticsFilter.doFilter(StatisticsFilter.java:69)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
                at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
                at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
                at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:673)
                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
                at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
                at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
                at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
                at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
                at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
                at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
                at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
                at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
                at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
                at java.base/java.lang.Thread.run(Thread.java:834)

This should be mapped to some other error, like 404.