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https://issues.apache.org/jira/browse/GUACAMOLE-2107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18014180#comment-18014180
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Nick Couchman commented on GUACAMOLE-2107:
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I have confirmed that it works fine up through version 1.5.5, and is broken in
version 1.6.0. Still trying to determine why it isn't working, though it looks
to have something to do with the code that was added to test the connection
prior to sending the WoL packet - something about that connection test is
erroneously saying that the system is already up and skipping the WoL send.
> Wake on LAN Packet not being sent
> ---------------------------------
>
> Key: GUACAMOLE-2107
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-2107
> Project: Guacamole
> Issue Type: Bug
> Components: guacamole, guacd
> Affects Versions: 1.6.0
> Environment: Docker 28.1.1 on x86 or ARM
> Reporter: Lorenzo S.
> Priority: Minor
> Attachments: Screenshot 2025-07-26 at 6.04.26.png, Screenshot
> 2025-07-26 at 6.12.56.png, Screenshot 2025-07-26 at 6.13.11.png
>
>
> Hello,
> I have confirmed that on guacamole versions newer than 1.5.3 the WOL feature
> is not working properly. Specifically the WOL packet is not sent, and the
> connection times out after about 10s despite having set a longer time
> (screenshot attached).
> Checking "guacd" it does provide the below entries:
> {code:java}
> guacd[1]: INFO: Creating new client for protocol "rdp"
> guacd[1]: INFO: Connection ID is "$f41f9319-154b-4c58-9b9c-3d9fd6995046"
> guacd[16]: INFO: Security mode: Negotiate (ANY)
> guacd[16]: INFO: Resize method: display-update
> guacd[16]: INFO: Clipboard line ending normalization: Preserve (none)
> guacd[16]: INFO: User "@6ec7067c-b91e-43b3-80b0-2fbeb9d7bb36" joined
> connection "$f41f9319-154b-4c58-9b9c-3d9fd6995046" (1 users now present)
> guacd[16]: INFO: Local system reports 4 processor(s) are available.
> guacd[16]: INFO: Graphical updates will be encoded using 4 worker
> thread(s).
> guacd[16]: INFO: Loading keymap "base"
> guacd[16]: INFO: Loading keymap "ja-jp-qwerty"
> guacd[16]: WARNING: Ignoring requested color depth of 16 bpp, as the RDP
> Graphics Pipeline requires 32 bpp.
> guacd[16]: INFO: RDP server closed/refused connection: Server refused
> connection (wrong security type?)
> guacd[16]: INFO: User "@6ec7067c-b91e-43b3-80b0-2fbeb9d7bb36"
> disconnected (0 users remain)
> guacd[16]: INFO: Last user of connection
> "$f41f9319-154b-4c58-9b9c-3d9fd6995046" disconnected
> guacd[1]: INFO: Connection "$f41f9319-154b-4c58-9b9c-3d9fd6995046"
> removed. {code}
> And "guacamole" those ones as well:
> {code:java}
> 21:03:32.450 [http-nio-8080-exec-8] INFO o.a.g.event.EventLoggingListener -
> User "*****" (authenticated by "postgresql") successfully authenticated from
> 192.168.**.***
> 21:04:12.231 [http-nio-8080-exec-7] INFO o.a.g.tunnel.TunnelRequestService -
> User "*****" connected to connection "11".
> Exception in thread "Thread-2" java.lang.IllegalStateException: Message will
> not be sent because the WebSocket session has been closed
> at
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.writeMessagePart(WsRemoteEndpointImplBase.java:454)
> at
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlockInternal(WsRemoteEndpointImplBase.java:312)
> at
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:265)
> at
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:249)
> at
> org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendString(WsRemoteEndpointImplBase.java:191)
> at
> org.apache.tomcat.websocket.WsRemoteEndpointBasic.sendText(WsRemoteEndpointBasic.java:36)
> at
> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint.sendInstruction(GuacamoleWebSocketTunnelEndpoint.java:152)
> at
> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint.access$200(GuacamoleWebSocketTunnelEndpoint.java:53)
> at
> org.apache.guacamole.websocket.GuacamoleWebSocketTunnelEndpoint$2.run(GuacamoleWebSocketTunnelEndpoint.java:253)
> 21:04:21.370 [http-nio-8080-exec-8] INFO o.a.g.tunnel.TunnelRequestService -
> User "*****" disconnected from connection "11". Duration: 9124 milliseconds
> {code}
> It shows an issue with "websocket" but it's seems a red herring as I am not
> connecting through a Proxy and without setting WOL, it works with no issues.
> The workaround I have found is using version 1.5.3 (for the supported
> architecture, which excludes ARM).
> Regards,
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