B4J Question [ Jnetwork ] udp sockets Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Thread-0" AND in thread "main"

[Waldemar Lima]

hello everyone, I currently created a udp client to send messages at all times to the b4j udp server, I can read all the messages that are being sent by the clients, but a few seconds later I receive these messages in the b4j console:

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Thread-0"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"

51018
[B]... [/B]

51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
51018
Mensagem Recebida  > An hello from a client [ 409 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
63208
Mensagem Recebida  > An hello from a client [ 123 ]
-------------------------------------------------------------
51018
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Thread-0"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"

I'm using this source code >

'Non-UI application (console / server application)
#Region Project Attributes
    #CommandLineArgs:
    #MergeLibraries: True
#End Region

Sub Process_Globals
   
    Private udp As UDPSocket
   
End Sub

Sub AppStart (Args() As String)
    Log("starts udp listener")
   
    udp.Initialize("udp",6832,8192)
   
    StartMessageLoop
   
End Sub

Sub udp_PacketArrived (Packet As UDPPacket)
   
    Log($"${Packet.Port}"$)
    Try
        Dim s As String
        s = BytesToString(Packet.Data, 0, Packet.Length, "UTF-8")
        Log("Mensagem Recebida  > "&s)
        Log("-------------------------------------------------------------")
    Catch
        Log(LastException)
    End Try
   
End Sub

I'm using this client to send messages (it's an .exe)
c++ client

virus total : https://www.virustotal.com/gui/url/...bb9b1909784fc2bbe7dcadce7f3d2e8b30c?nocache=1

 

[Jmu5667]

Have you run this without the logging and just the exception handler ?

 

[teddybear]

I'm using this client to send messages (it's an .exe)
c++ client

I don't know how the client sends udp, I think it sends udp packets too fast, which exceeds the GC and ultimately leads to the server memory exhaustion

 

[Waldemar Lima]

I don't know how the client sends udp, I think it sends udp packets too fast, which exceeds the GC and ultimately leads to memory exhaustion

the socket udp client library is based on stream, not packets... although it is also compatible with packet-like udp socket.

 

[Waldemar Lima]

Have you run this without the logging and just the exception handler ?

seems to have solved the problem...

 

[Jmu5667]

seems to have solved the problem...

Excellent !

 

[Erel]

seems to have solved the problem...

You should post the solution.

 

[Waldemar Lima]

You should post the solution.

well, the solution was not to use log to display the messages, "apparently"