B4J Question [ jServer ] java.lang.IllegalStateException: Committed

[Waldemar Lima]

AuthCallback

Else If (req.GetParameter("code") <> "") Then
        Log("code")
        Try

            Dim codeAuth As String    = req.GetParameter("code")
            Wait For(Auth.GetUserToken(codeAuth)) Complete (codeToken As String)
            resp.SendRedirect("/lobby?session="&codeToken) ' THIS IS LINE 61

        Catch
            'Handle failure
           
            resp.SendRedirect("/login.html")
           
        End Try
end if

Auth.GetUserToken

Sub GetUserToken(usercode As String) As ResumableSub
    
    Dim j As HttpJob
    j.Initialize("", Me)
    j.PostString("https://mywebsite.com...",usercode)
    j.GetRequest.SetContentType("application/x-www-form-urlencoded")
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        Log("token = "&j.GetString)
        Dim parser As JSONParser
        parser.Initialize(j.GetString)
        Dim root As Map = parser.NextObject
        Dim access_token As String = root.Get("access_token")
        Return access_token
    End If
    j.Release
    
End Sub

Error

Error occurred on line: 61 (AuthCallback)
java.lang.IllegalStateException: Committed
    at org.eclipse.jetty.server.HttpChannel.resetBuffer(HttpChannel.java:1138)
    at org.eclipse.jetty.server.HttpOutput.resetBuffer(HttpOutput.java:1419)
    at org.eclipse.jetty.server.Response.resetBuffer(Response.java:1255)
    at org.eclipse.jetty.server.Response.sendRedirect(Response.java:592)
    at org.eclipse.jetty.server.Response.sendRedirect(Response.java:526)
    at org.eclipse.jetty.server.Response.sendRedirect(Response.java:601)
    at anywheresoftware.b4j.object.JServlet$ServletResponseWrapper.SendRedirect(JServlet.java:406)
    at b4j.example.authcallback$ResumableSub_Handle.resume(authcallback.java:276)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resumeAsUserSub(DebugResumableSub.java:47)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:629)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at anywheresoftware.b4a.shell.DebugResumableSub$DelegatableResumableSub.resume(DebugResumableSub.java:42)
    at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:156)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:105)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at anywheresoftware.b4a.keywords.Common$3.run(Common.java:1119)
    at anywheresoftware.b4a.keywords.SimpleMessageLoop.runMessageLoop(SimpleMessageLoop.java:47)
    at anywheresoftware.b4a.StandardBA.startMessageLoop(StandardBA.java:43)
    at anywheresoftware.b4a.shell.ShellBA.startMessageLoop(ShellBA.java:121)
    at anywheresoftware.b4a.keywords.Common.StartMessageLoop(Common.java:180)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:309)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    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 anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:100)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at b4j.example.main.main(main.java:29)

This error occurs when I run "wait for " before calling redirect

 

[Erel]

Resumable Subs (wait for / sleep) in server handlers