More errors in log jmix 2.6.0: UIDetachedException after log out

Support
#1

Not only am I getting this error in dev mode: Upgrade to 2.6.0 Gives Copilot Error on Logout - #2 by mbucan
But I also had the ExecutionFailedException: PWA icons generation failed error when doing a production build, which the org.gradle.jvmargs=-Xmx1024M seems to fix.

Now I also get this error after logging out of my AWS deployed/production environment. I think this happens about 1 second after logging out. I believe I have also seen this in dev mode.

I understand these don’t interrupt the user, but we cannot have errors logged that require investigation each time.

Thank you for your help!

Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: 2025-07-13T16:36:21.066Z ERROR 1559545 --- [  UiAsyncTask-0] io.jmix.flowui.asynctask.UiAsyncTasks    : UI async task error
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: java.util.concurrent.CompletionException: com.vaadin.flow.component.UIDetachedException
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:791) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1810) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: Caused by: com.vaadin.flow.component.UIDetachedException: null
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at com.vaadin.flow.component.UI.handleAccessDetach(UI.java:466) ~[flow-server-24.7.5.jar!/:24.7.5]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at com.vaadin.flow.component.UI.access(UI.java:566) ~[flow-server-24.7.5.jar!/:24.7.5]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at com.vaadin.flow.component.UI.access(UI.java:553) ~[flow-server-24.7.5.jar!/:24.7.5]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at io.jmix.flowui.asynctask.UiAsyncTasks$RunnableConfigurer.lambda$runAsync$0(UiAsyncTasks.java:258) ~[jmix-flowui-2.6.0.jar!/:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:787) ~[na:na]
Jul 13 16:36:21 ip-172-31-35-36 web[1559545]: #011... 5 common frames omitted
#2

@chicojeff I have been struggling to run 2.6.0 almost whole day without success. Getting below error. I wonder if you/anyone else faced the same issue:

2025-07-13T22:44:38.972+02:00  INFO 3436 --- [in-dev-server-1] c.v.f.s.frontend.TaskRunDevBundleBuild   : Creating a new development mode bundle. This can take a while but will only run when the project setup is changed, addons are added or frontend files are modified
2025-07-13T22:44:50.574+02:00 ERROR 3436 --- [in-dev-server-1] c.v.f.s.frontend.TaskRunDevBundleBuild   : Command `/opt/homebrew/bin/node /Users/xx/git/xx/xx/node_modules/vite/bin/vite.js build` failed:
vite v6.3.5 building for production...
transforming...
Comment replacement failed to change anything
✓ 2388 modules transformed.
vite v6.3.5 building for production...
transforming...
✓ 79 modules transformed.
rendering chunks...
computing gzip size...
../build/dev-bundle/webapp/sw.js  65.32 kB │ gzip: 15.90 kB
✓ built in 350ms
✗ Build failed in 10.44s
error during build:
Cannot add property 0, object is not extensible
    at Array.push (<anonymous>)
    at ConditionalExpression.getLiteralValueAtPath (file:///Users/xx/git/xx/xx/node_modules/.pnpm/rollup@4.45.0/node_modules/rollup/dist/es/shared/node-entry.js:12270:45)
    at ConditionalExpression.getLiteralValueAtPath (file:///Users/xx/git/xx/xx/node_modules/.pnpm/rollup@4.45.0/node_modules/rollup/dist/es/shared/node-entry.js:12262:53)
#4

Well at least yours is working, I have still some work on mine :slight_smile:
The error basically says that something is trying to access your view after it has been detached.
Detachment happens when a view is navigated away, closed or the session has expired.
UiAsyncTasks …
Are you using this
https://docs.jmix.io/jmix/flow-ui/async-tasks.html
or this maybe
https://docs.jmix.io/jmix/flow-ui/background-tasks.html
in your application?

If yes, try to wrap it in
try {
…
} catch (UIDetachedException e) {
log.warn(“Skipping”)
}

If not, hopefully the Jmix team will know.

Kind regards,
Mladen

#5

Hello,
this looks nasty :slight_smile:
I’m not having this error, but I have an idea.
So, Jmix 2.6 whats new

The following major dependencies have been updated:
* Spring Boot [3.5](https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.5-Release-Notes).
* Vaadin [24.7](https://github.com/vaadin/platform/releases/tag/24.7.0).

and when I follow vaadin link
* **Change supported Node from 18 to 20**: Node 20 is the active LTS version for Node. Node 18 will be end of life soon and new libraries like React 19 support Node 20+
and you get some Node related errors, could it be you need to upgrade it to latest version?

Kind regards,
Mladen

#6

Thanks for the ideas. I do not use any jmix async or background tasks, which is why I thought it was strange for the stack trace to start there.

The jmix addons I am using are: auth-server, rest, appsettings, quartz, gridexport, jmxconsole, audit. The other jmix imports are from the initial project creation, which started in jmix 1.x:
image

For your second response, maybe you were replying to getshahzad, but I thought Node was only used during the build process? I confirmed the GitHub action runners I use for the production build are using Node 20.

Doing more testing this morning, I get this error about 1 minute after logging out in dev mode:

2025-07-14T08:56:42.686-04:00 ERROR 16056 --- [  UiAsyncTask-0] io.jmix.flowui.asynctask.UiAsyncTasks    : UI async task error

java.util.concurrent.CompletionException: com.vaadin.flow.component.UIDetachedException
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[na:na]
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[na:na]
	at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:791) ~[na:na]
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[na:na]
	at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1810) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]
Caused by: com.vaadin.flow.component.UIDetachedException: null
	at com.vaadin.flow.component.UI.handleAccessDetach(UI.java:466) ~[flow-server-24.7.5.jar:24.7.5]
	at com.vaadin.flow.component.UI.access(UI.java:566) ~[flow-server-24.7.5.jar:24.7.5]
	at com.vaadin.flow.component.UI.access(UI.java:553) ~[flow-server-24.7.5.jar:24.7.5]
	at io.jmix.flowui.asynctask.UiAsyncTasks$RunnableConfigurer.lambda$runAsync$0(UiAsyncTasks.java:258) ~[jmix-flowui-2.6.0.jar:na]
	at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:787) ~[na:na]
	... 5 common frames omitted