[Bug] [dinky admin] The page is stucked possibly because of websocket deadlock

[xiaobosu]

Search before asking

• I had searched in the issues and found no similar issues.

What happened

The whole site is stuck with no responding.

What you expected to happen

Many errors in the logs like this:

[dinky] 2025-01-14 18:44:31 CST ERROR org.dinky.ws.GlobalWebSocket 169 lambda$sendTopic$5 - Error sending sse data:UT000094: Blocking await method called from IO thread. Blocking IO must be dispatched to a worker thread or deadlocks will result.
[dinky] 2025-01-14 18:44:31 CST ERROR org.dinky.ws.GlobalWebSocket 169 lambda$sendTopic$5 - Error sending sse data:UT000094: Blocking await method called from IO thread. Blocking IO must be dispatched to a worker thread or deadlocks will result.
[dinky] 2025-01-14 19:02:08 CST ERROR org.dinky.ws.GlobalWebSocket 169 lambda$sendTopic$5 - Error sending sse data:null
[dinky] 2025-01-14 19:02:08 CST ERROR org.dinky.ws.GlobalWebSocket 169 lambda$sendTopic$5 - Error sending sse data:null

Dump:

"XNIO-1 I/O-3" #38 prio=5 os_prio=0 tid=0x00007f043fb2a800 nid=0x1ede in Object.wait() [0x00007f03ad5e9000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	at io.undertow.server.protocol.framed.AbstractFramedStreamSinkChannel.awaitWritable(AbstractFramedStreamSinkChannel.java:329)
	- locked <0x000000077ed9aae8> (a java.lang.Object)
	at io.undertow.server.protocol.framed.AbstractFramedStreamSinkChannel.awaitWritable(AbstractFramedStreamSinkChannel.java:313)
	at io.undertow.websockets.core.WebSockets.sendBlockingInternal(WebSockets.java:1000)
	at io.undertow.websockets.core.WebSockets.sendBlockingInternal(WebSockets.java:986)
	at io.undertow.websockets.core.WebSockets.sendTextBlocking(WebSockets.java:200)
	at io.undertow.websockets.jsr.WebSocketSessionRemoteEndpoint$BasicWebSocketSessionRemoteEndpoint.sendText(WebSocketSessionRemoteEndpoint.java:258)
	at org.dinky.ws.GlobalWebSocket.lambda$sendTopic$5(GlobalWebSocket.java:166)
	at org.dinky.ws.GlobalWebSocket$$Lambda$1057/197355796.accept(Unknown Source)
	at java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1597)
	at org.dinky.ws.GlobalWebSocket.sendTopic(GlobalWebSocket.java:160)
	at org.dinky.ws.GlobalWebSocket.lambda$firstSend$4(GlobalWebSocket.java:156)
	at org.dinky.ws.GlobalWebSocket$$Lambda$2026/1311504787.accept(Unknown Source)
	at java.util.HashMap.forEach(HashMap.java:1289)
	at org.dinky.ws.GlobalWebSocket.firstSend(GlobalWebSocket.java:155)
	at org.dinky.ws.GlobalWebSocket.onMessage(GlobalWebSocket.java:127)
	at sun.reflect.GeneratedMethodAccessor595.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at io.undertow.websockets.jsr.annotated.BoundMethod.invoke(BoundMethod.java:87)
	at io.undertow.websockets.jsr.annotated.AnnotatedEndpoint$2.onMessage(AnnotatedEndpoint.java:142)
	at io.undertow.websockets.jsr.FrameHandler$7.run(FrameHandler.java:288)
	at io.undertow.websockets.jsr.ServerWebSocketContainer$1.call(ServerWebSocketContainer.java:170)
	at io.undertow.websockets.jsr.ServerWebSocketContainer$1.call(ServerWebSocketContainer.java:167)
	at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at io.undertow.websockets.jsr.ServerWebSocketContainer.invokeEndpointMethod(ServerWebSocketContainer.java:610)
	at io.undertow.websockets.jsr.ServerWebSocketContainer.invokeEndpointMethod(ServerWebSocketContainer.java:600)
	at io.undertow.websockets.jsr.FrameHandler.invokeTextHandler(FrameHandler.java:268)
	at io.undertow.websockets.jsr.FrameHandler.onFullTextMessage(FrameHandler.java:319)
	at io.undertow.websockets.core.AbstractReceiveListener$2.complete(AbstractReceiveListener.java:156)
	at io.undertow.websockets.core.AbstractReceiveListener$2.complete(AbstractReceiveListener.java:152)
	at io.undertow.websockets.core.BufferedTextMessage.read(BufferedTextMessage.java:105)
	at io.undertow.websockets.core.AbstractReceiveListener.readBufferedText(AbstractReceiveListener.java:152)
	at io.undertow.websockets.core.AbstractReceiveListener.bufferFullMessage(AbstractReceiveListener.java:90)
	at io.undertow.websockets.jsr.FrameHandler.onText(FrameHandler.java:184)
	at io.undertow.websockets.core.AbstractReceiveListener.handleEvent(AbstractReceiveListener.java:44)
	at io.undertow.websockets.core.AbstractReceiveListener.handleEvent(AbstractReceiveListener.java:33)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:974)
	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:954)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:591)

How to reproduce

open some page and work for a while.
use CDCSOURCE and read some jars by rs url

Anything else

I guess it's introduced by this pr: #3724

Version

1.2.0

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

Hello @xiaobosu, this issue is about web, so I assign it to @Zzm0809. If you have any questions, you can comment and reply.

你好 @xiaobosu, 这个 issue 是关于 web 的，所以我把它分配给了 @Zzm0809。如有任何问题，可以评论回复。

[mobivatrix]

if you check the server connection, you will find all new created socket connections

1. check reconnect in UseWebSocketModel.tsx
2. just in login page without logining, check websocket
3. when logout, the connection may not be closed

[MactavishCui]

I'll submit a PR to fix this bug today or tomorrow. This problem will be solved in release 1.2.1. Thx

[GeorgeKong677]

dinky 1.2.1 in use,but it still print out like:
[dinky] 2025-02-24 08:26:03 UTC ERROR org.dinky.ws.GlobalWebSocket 171 lambda$sendTopic$5 - Error sending sse data:UT000094: Blocking await method called from IO thread. Blocking IO must be dispatched to a worker thread or deadlocks will result.