Unexpected exception running Jobs project

[greenlaw110]

The Jobs sample project sometimes (not always) throws IllegalARgumentException issue:

2020-06-29 08:57:05,607 ERROR i.u.request@[XNIO-1 I/O-2] - UT005071: Undertow request failed HttpServerExchange{ GET /log}
java.lang.IllegalArgumentException: null
	at org.osgl.util.E.illegalArgumentIf(E.java:672)
	at org.osgl.util.S.requireNotBlank(S.java:518)
	at act.inject.param.JsonDtoPatch.<init>(JsonDtoPatch.java:50)
	at act.inject.param.JsonDtoPatch.of(JsonDtoPatch.java:125)
	at act.handler.builtin.controller.impl.ReflectedHandlerInvoker.<init>(ReflectedHandlerInvoker.java:331)
	at act.handler.builtin.controller.impl.ReflectedHandlerInvoker.createControllerAction(ReflectedHandlerInvoker.java:1289)
	at act.Act$Mode.createRequestHandler(Act.java:164)
	at act.handler.builtin.controller.RequestHandlerProxy.generateHandlers(RequestHandlerProxy.java:445)
	at act.handler.builtin.controller.RequestHandlerProxy.ensureAgentsReady(RequestHandlerProxy.java:369)
	at act.handler.builtin.controller.RequestHandlerProxy.skipEvents(RequestHandlerProxy.java:307)
	at act.handler.DelegateRequestHandler.skipEvents(DelegateRequestHandler.java:47)
	at act.app.ActionContext.skipEvents(ActionContext.java:243)
	at act.handler.event.ResultEvent$2.apply(ResultEvent.java:92)
	at act.handler.event.ResultEvent$2.apply(ResultEvent.java:86)
	at org.osgl.mvc.MvcConfig.applyAfterCommitResultHandler(MvcConfig.java:230)
	at act.ActResponse.afterWritingContent(ActResponse.java:167)
	at act.xio.undertow.UndertowResponse.writeContent(UndertowResponse.java:109)
	at act.xio.undertow.UndertowResponse.writeContent(UndertowResponse.java:48)
	at org.osgl.mvc.ErrorPageRenderer.apply(ErrorPageRenderer.java:48)
	at org.osgl.mvc.result.ErrorResult.applyMessage(ErrorResult.java:195)
	at org.osgl.mvc.result.Result.apply(Result.java:265)
	at act.xio.NetworkHandler.handleErrorResult(NetworkHandler.java:289)
	at act.xio.NetworkHandler.handleException(NetworkHandler.java:281)
	at act.xio.NetworkHandler.handle(NetworkHandler.java:256)
	at act.xio.undertow.ActHttpHandler.handleRequest(ActHttpHandler.java:58)
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:370)
	at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:255)
	at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136)
	at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:59)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:591)

[greenlaw110]

This is due to sometimes bytecode enhancer failed to tag @Named("limit") annotation to the limit parameter in JobLog controller:

    @Command(name = "log.list", help = "List job logs")
    @PropertySpec("this as log")
    @GetAction("/log")
    public static List<String> logs(
            @Optional(help = "limit the lines returned") Integer limit // this one should be tagged with @Named("limit")
    ) {
        if (null != limit && limit > 0) {
            return logs.take(limit);
        } else {
            return C.list(logs);
        }
    }