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Type: Bug
Resolution: Fixed
Priority: Normal
Fix Version/s: 9.0.1
Affects Version/s: 8.6.4
Component/s: ZK Client Engine
Labels:
- websocket
Environment:

Fails on WildFly Full 18.0.1.Final
Works with Jetty / Tomcat / Glassfish

gh.sprint.customfield.default.name:
ZK 9.0.1 S1
Safety specification requirements:
None

Steps to Reproduce

enable WebSocket in zk.xml

trigger an AU

<zk>
    <button onClick="Clients.log(event.toString())" label="test event"/>
</zk>

Current Result

server error in WildFly Full 18.0.1.Final

04:08:30,678 WARN  [org.zkoss.zkmax.au.websocket.WebSocketEndPoint] (default task-2) SERVER ERROR: java.lang.IllegalStateException: ZK Session cannot be null!
	at deployment.zktest-9.0.1-SNAPSHOT.war//org.zkoss.zk.ui.http.ZKWebSocket.initZkDesktop(ZKWebSocket.java:80)
	at deployment.zktest-9.0.1-SNAPSHOT.war//org.zkoss.zkmax.au.websocket.WebSocketEndPoint.onOpen(WebSocketEndPoint.java:93)
	at io.undertow.websocket@2.0.27.Final//io.undertow.websockets.jsr.EndpointSessionHandler.onConnect(EndpointSessionHandler.java:129)
	at io.undertow.websocket@2.0.27.Final//io.undertow.websockets.jsr.JsrWebSocketFilter$1.handleUpgrade(JsrWebSocketFilter.java:165)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpReadListener.exchangeComplete(HttpReadListener.java:385)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpServerConnection.exchangeComplete(HttpServerConnection.java:232)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange.invokeExchangeCompleteListeners(HttpServerExchange.java:1279)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange.terminateResponse(HttpServerExchange.java:1563)
	at io.undertow.core@2.0.27.Final//io.undertow.server.Connectors.terminateResponse(Connectors.java:159)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpTransferEncoding$3.handleEvent(HttpTransferEncoding.java:197)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpTransferEncoding$3.handleEvent(HttpTransferEncoding.java:195)
	at io.undertow.core@2.0.27.Final//io.undertow.conduits.HeadStreamSinkConduit.exitFlush(HeadStreamSinkConduit.java:192)
	at io.undertow.core@2.0.27.Final//io.undertow.conduits.HeadStreamSinkConduit.flush(HeadStreamSinkConduit.java:133)
	at org.jboss.xnio@3.7.3.Final//org.xnio.conduits.ConduitStreamSinkChannel.flush(ConduitStreamSinkChannel.java:162)
	at io.undertow.core@2.0.27.Final//io.undertow.channels.DetachableStreamSinkChannel.flush(DetachableStreamSinkChannel.java:119)
	at org.jboss.xnio@3.7.3.Final//org.xnio.channels.Channels.flushBlocking(Channels.java:63)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.ServletOutputStreamImpl.close(ServletOutputStreamImpl.java:618)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.HttpServletResponseImpl.closeStreamAndWriter(HttpServletResponseImpl.java:528)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.HttpServletResponseImpl.responseDone(HttpServletResponseImpl.java:617)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:328)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
	at io.undertow.core@2.0.27.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
	at java.base/java.lang.Thread.run(Thread.java:834)

04:08:30,692 ERROR [io.undertow.websockets.jsr.request] (default task-2) UT026001: Unable to instantiate endpoint: java.lang.NullPointerException
	at deployment.zktest-9.0.1-SNAPSHOT.war//org.zkoss.zkmax.au.websocket.WebSocketEndPoint.sendText(WebSocketEndPoint.java:297)
	at deployment.zktest-9.0.1-SNAPSHOT.war//org.zkoss.zkmax.au.websocket.WSAuWriter.close(WSAuWriter.java:68)
	at deployment.zktest-9.0.1-SNAPSHOT.war//org.zkoss.zkmax.au.websocket.WebSocketEndPoint.onError(WebSocketEndPoint.java:163)
	at io.undertow.websocket@2.0.27.Final//io.undertow.websockets.jsr.EndpointSessionHandler.onConnect(EndpointSessionHandler.java:131)
	at io.undertow.websocket@2.0.27.Final//io.undertow.websockets.jsr.JsrWebSocketFilter$1.handleUpgrade(JsrWebSocketFilter.java:165)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpReadListener.exchangeComplete(HttpReadListener.java:385)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpServerConnection.exchangeComplete(HttpServerConnection.java:232)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange.invokeExchangeCompleteListeners(HttpServerExchange.java:1279)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange.terminateResponse(HttpServerExchange.java:1563)
	at io.undertow.core@2.0.27.Final//io.undertow.server.Connectors.terminateResponse(Connectors.java:159)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpTransferEncoding$3.handleEvent(HttpTransferEncoding.java:197)
	at io.undertow.core@2.0.27.Final//io.undertow.server.protocol.http.HttpTransferEncoding$3.handleEvent(HttpTransferEncoding.java:195)
	at io.undertow.core@2.0.27.Final//io.undertow.conduits.HeadStreamSinkConduit.exitFlush(HeadStreamSinkConduit.java:192)
	at io.undertow.core@2.0.27.Final//io.undertow.conduits.HeadStreamSinkConduit.flush(HeadStreamSinkConduit.java:133)
	at org.jboss.xnio@3.7.3.Final//org.xnio.conduits.ConduitStreamSinkChannel.flush(ConduitStreamSinkChannel.java:162)
	at io.undertow.core@2.0.27.Final//io.undertow.channels.DetachableStreamSinkChannel.flush(DetachableStreamSinkChannel.java:119)
	at org.jboss.xnio@3.7.3.Final//org.xnio.channels.Channels.flushBlocking(Channels.java:63)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.ServletOutputStreamImpl.close(ServletOutputStreamImpl.java:618)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.HttpServletResponseImpl.closeStreamAndWriter(HttpServletResponseImpl.java:528)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.spec.HttpServletResponseImpl.responseDone(HttpServletResponseImpl.java:617)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:328)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at org.wildfly.extension.undertow@18.0.1.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
	at io.undertow.servlet@2.0.27.Final//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
	at io.undertow.core@2.0.27.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
	at io.undertow.core@2.0.27.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
	at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
	at java.base/java.lang.Thread.run(Thread.java:834)

Expected Result

working WS connection

Debug Information

https://github.com/zkoss/zkcml/blob/v8.6.4/zkmax/src/org/zkoss/zkmax/au/websocket/WebSocketFilter.java#L68

In Undertow this would be triggered twice.
ZK cannot get the ZK Session by tempSessionKey since it is different.

Workaround

relates to

ZK-4429 websockets not working on Glassfish (5)

Closed

Details

Description

Steps to Reproduce

Current Result

Expected Result

Debug Information

Workaround

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