B4J Question Unstable websocket

K

kostefar

Active Member
Licensed User
Longtime User
Dear All,

Upon request by Erel, here´s a new thread about this subject, continuing this one:

https://www.b4x.com/android/forum/t...t-accepts-all-certificates.88926/#post-562603

So Erel taught me how to bypass SSL authentication, which is required for the websocket (not the one in Erels code) that I´m connected to - copied and pasted from Erels code:


B4X: 
Sub Process_Globals
   Private fx As JFX
   Private MainForm As Form
   Private ws As WebSocketClient
End Sub

Sub AppStart (Form1 As Form, Args() As String)
   MainForm = Form1
   MainForm.Show
 
   ws.Initialize("ws")
   'accept all trust manager
   Dim ssl As JavaObject
   ssl.InitializeNewInstance("org.eclipse.jetty.util.ssl.SslContextFactory", Array(True))
   Dim jo As JavaObject = ws
   Dim wsc As JavaObject
   wsc.InitializeNewInstance("org.eclipse.jetty.websocket.client.WebSocketClient", Array(ssl))
   jo.SetField("wsc", wsc)
 
   ws.Connect("wss://b4x.com:51041/smiley/ws")
   Wait For ws_Connected
   Log("connected")
 
End Sub


It did indeed solve the connection problem, but at random times I get various errors, such as:


B4X: 
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:513)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.nio.channels.AsynchronousCloseException
    ... 17 more
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:520)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
java.util.concurrent.ExecutionException: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
    at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper.Close(WebSocketClientWrapper.java:76)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$WSHandler.onWebSocketError(WebSocketClientWrapper.java:118)
    at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onError(JettyListenerEventDriver.java:112)
    at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingError(AbstractEventDriver.java:96)
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.handleException(WebSocketUpgradeRequest.java:526)
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:520)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:513)
    ... 28 more
Caused by: java.nio.channels.AsynchronousCloseException
    ... 17 more
ws Connecting
ws error: 0 null
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:513)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.nio.channels.AsynchronousCloseException
    ... 17 more
org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:520)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
java.util.concurrent.ExecutionException: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
    at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper.Close(WebSocketClientWrapper.java:76)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$WSHandler.onWebSocketError(WebSocketClientWrapper.java:118)
    at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onError(JettyListenerEventDriver.java:112)
    at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingError(AbstractEventDriver.java:96)
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.handleException(WebSocketUpgradeRequest.java:526)
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:520)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:193)
    at org.eclipse.jetty.client.ResponseNotifier.notifyComplete(ResponseNotifier.java:185)
    at org.eclipse.jetty.client.HttpReceiver.terminateResponse(HttpReceiver.java:459)
    at org.eclipse.jetty.client.HttpReceiver.abort(HttpReceiver.java:540)
    at org.eclipse.jetty.client.HttpChannel.abortResponse(HttpChannel.java:129)
    at org.eclipse.jetty.client.HttpChannel.abort(HttpChannel.java:122)
    at org.eclipse.jetty.client.HttpExchange.abort(HttpExchange.java:257)
    at org.eclipse.jetty.client.HttpConversation.abort(HttpConversation.java:141)
    at org.eclipse.jetty.client.HttpRequest.abort(HttpRequest.java:748)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.abort(HttpConnectionOverHTTP.java:166)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:152)
    at org.eclipse.jetty.client.http.HttpConnectionOverHTTP.close(HttpConnectionOverHTTP.java:143)
    at java.util.ArrayList.forEach(ArrayList.java:1249)
    at org.eclipse.jetty.client.AbstractConnectionPool.close(AbstractConnectionPool.java:191)
    at org.eclipse.jetty.client.DuplexConnectionPool.close(DuplexConnectionPool.java:233)
    at org.eclipse.jetty.client.HttpDestination.close(HttpDestination.java:368)
    at org.eclipse.jetty.client.HttpClient.doStop(HttpClient.java:248)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:142)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:160)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:401)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:89)
    at anywhersoftware.b4j.objects.WebSocketClientWrapper$2.run(WebSocketClientWrapper.java:83)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.eclipse.jetty.websocket.api.UpgradeException: 0 null
    at org.eclipse.jetty.websocket.client.WebSocketUpgradeRequest.onComplete(WebSocketUpgradeRequest.java:513)
    ... 28 more
Caused by: java.nio.channels.AsynchronousCloseException
    ... 17 more
ws Connecting
ws error: 0 null
connected

or

B4X: 
java.nio.channels.ClosedChannelException
    at org.eclipse.jetty.io.WriteFlusher.onClose(WriteFlusher.java:507)
    at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onIncompleteFlush(SslConnection.java:527)
    at org.eclipse.jetty.io.AbstractEndPoint$2.onIncompleteFlush(AbstractEndPoint.java:54)
    at org.eclipse.jetty.io.WriteFlusher.write(WriteFlusher.java:331)
    at org.eclipse.jetty.io.AbstractEndPoint.write(AbstractEndPoint.java:372)
    at org.eclipse.jetty.websocket.common.io.FrameFlusher$Flusher.flush(FrameFlusher.java:153)
    at org.eclipse.jetty.websocket.common.io.FrameFlusher$Flusher.process(FrameFlusher.java:217)
    at org.eclipse.jetty.util.IteratingCallback.processing(IteratingCallback.java:241)
    at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:224)
    at org.eclipse.jetty.websocket.common.io.FrameFlusher.enqueue(FrameFlusher.java:382)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.outgoingFrame(AbstractWebSocketConnection.java:614)
    at org.eclipse.jetty.websocket.client.io.WebSocketClientConnection.outgoingFrame(WebSocketClientConnection.java:72)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onConnectionStateChange(AbstractWebSocketConnection.java:473)
    at org.eclipse.jetty.websocket.common.io.IOState.notifyStateListeners(IOState.java:184)
    at org.eclipse.jetty.websocket.common.io.IOState.onReadFailure(IOState.java:498)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:666)
    at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:511)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
    at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:289)
    at org.eclipse.jetty.io.ssl.SslConnection$3.succeeded(SslConnection.java:149)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
    at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
    at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
    at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
    at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:673)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:591)
    at java.lang.Thread.run(Thread.java:745)
ws error:
ws error: WebSocket Read EOF
ws Connecting
connected

I said in the other thread that it works in b4a, but that wasn´t entirely true I found although it can run for a longer time there without crashing the app.

I´ve requested to send the project directly to Erel zipped, since there could be some stuff in there revealing private data although I don´t think so but just to be sure.

Nevertheless, it could be that Erels solution will be able to help others when this thread gets updated.
 
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K

kostefar

Active Member
Licensed User
Longtime User
Erel said:
My guess is that the problem is in the WebSocket server. You should catch this error and try to reconnect.
Click to expand...

Thanks Erel,

Sounds right, since websockets I dealt with before never gave me this sort of problems.
In my code, there´s a time that fires upon errors or timeouts:

B4X: 
Sub timerws_tick

    ws.Close
    Init_Ws
  
End Sub

Sub ws_Closed (Reason As String)
  
    Log("ws error: " & Reason)
    ws.close
    timerws.Enabled = True

End Sub

Sub ws_TextMessage (Message As String)
    timerws.Enabled = False
    timerws.Enabled = True
 
    Log (Message)




End Sub

I increased its interval from 10000 to 20000, which seemed to help running the socket for a longer time.
But it´s like there´s a limit to how many times b4j accepts to do these very frequent reconnects (that I actually also see happening in chromes developer tools inspector) before the app crashes.
Also, I figured that in some cases it connects, but does not receive data and just keeps on doing that after the timeout I´ve manually set on the websocket with the timer. I found out that restarting b4j (not just the project) helps.. maybe that can also contribute to finding the culprit here.
Could it be that there´s a socket buffer that is not getting emptied or something like that?
Any good ideas?
 
Last edited:
Upvote 0
Erel

Erel

B4X founder
Staff member
Licensed User
Longtime User
Upvote 0
K

kostefar

Active Member
Licensed User
Longtime User
Erel said:
Restarting B4J has nothing to do with it.


I don't see any code that reconnects.
Click to expand...

Like I said, I´d be really pleased if I could send this to you directly so that you can see it all for yourself. I do understand if what I´m doing is not clear from a few parts of the project. The reconnecting is the tick event that closes the connection when triggered, and connects again.

Here´s a "censored" version of it all. Some stuff there may seem strange, unnecessary and unorthodox, which is the result of trying alot of different things to get this working:

B4X: 
#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
Dim ws As WebSocketClient
Dim timerws As Timer
    Private fx As JFX
    Private MainForm As Form
End Sub
Sub timerws_tick

    ws.Close
    Init_Ws
    
End Sub
Sub ws_TextMessage (Message As String)
    timerws.Enabled = False
    timerws.Enabled = True
    
    Log (Message)


End Sub

Sub Init_Ws
    ws.Initialize("ws")
    timerws.Enabled = True
    Dim ssl As JavaObject
    ssl.InitializeNewInstance("org.eclipse.jetty.util.ssl.SslContextFactory", Array(True))

    Dim jo As JavaObject = ws
    Dim wsc As JavaObject
    wsc.InitializeNewInstance("org.eclipse.jetty.websocket.client.WebSocketClient", Array(ssl))
    jo.SetField("wsc", wsc)
    ws.Connect("wss://***")
    Log("ws Connecting")
    Wait For ws_Connected
    Log("connected")
    ws.SendText($"***"$)
    Wait For ws_TextMessage (Message As String)
    Log (Message)
    ws.SendText($"***"$)
    Log ("send 2")
    Sleep (100)
    ws.SendText($"***"$)
    Log ("send 3")
    Sleep (100)
    ws.SendText($"***"$)
    Log ("send 4")
    Sleep (100)
    ws.SendText($"***"$)
    Log ("send 5")
    Sleep (100)
    ws.SendText($"***"$)
    Log ("send 6")
    Sleep (100)
    ws.SendText($"***"$)
    Log ("send 7")
    Wait For ws_TextMessage (Message As String)
    Log(Message)
    timerws.Enabled = False
End Sub
Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    'MainForm.RootPane.LoadLayout("Layout1") 'Load the layout file.
    MainForm.Show
    ws.Initialize("ws")
    timerws.Initialize("timerws",20000)
    Init_Ws
End Sub
Private Sub ws_Connected
    Log ("ws closed")
End Sub
Sub ws_Closed (Reason As String)
    
    Log("ws error: " & Reason)
    ws.close
    timerws.Enabled = True

End Sub
'Return true to allow the default exceptions handler to handle the uncaught exception.
Sub Application_Error (Error As Exception, StackTrace As String) As Boolean
    Return True
Log (Error.Message & " " & StackTrace)

End Sub


Thanks in advance!
 
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kostefar

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Longtime User
Erel said:
You should add Dim ws As WebSocketClient to Init_Ws.

Also add a few seconds sleep before you try to reopen the connection.
Click to expand...

Thanks Erel, let´s try that.

So you want me to have ws Dim´ed both in global and in Init_Ws?
Otherwise it will not be known in

B4X: 
Sub timerws_tick

    ws.Close
    Init_Ws
    
End Sub
 
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kostefar

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Erel said:
Yes. This is the correct way to create a new instance.
Click to expand...

Thanks, I´m testing it against a b4a version of the same so I´ll see if any of them crashes and also look at how much data they can swallow per day or hour if running stable, which should a good indication of how often sockets experience problems. I´ll get back with the results in some days.
 
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kostefar

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So in case somebody´s reading this, as promised I´m back. It seemed that nomatter what I did, the websockets would be so on and off that I decided to find other ways of obtaining the data needed. I agree that this is probably the host who has a problem, and I guess the websocket client implementation was never designed to deal with a sockethost like this. There really are times where it would just get into a loop of EOF, timeouts and other kinds of error messages as a result of each attempt to connect. Often restarting the project would change this behaviour but only for a while.
The problems were there with both b4j and b4a.
 
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