java.lang.IllegalStateException: Tried to start task BackgroundTask while in foreground, but this is not allowed

[nicatasa]

Phone: Xiaomi redmi note 4x

Tried to start task BackgroundTask while in foreground, but this is not allowed
at (Headless.JsTaskContext.java: 92)
at(Headless.JsTaskService.java: 125)
and etc...

How to fix it ?

BackgroundTask.define(() => { GetCountryNames(); BackgroundTask.finish() }) BackgroundTask.schedule({ period: 10800 })

[nicatasa]

This error happens every 3hours (period: 108000) only xiaomi devices or only my device for some background restrics and permissions.

[0xAnakin]

java.lang.IllegalStateException:
at com.facebook.react.jstasks.HeadlessJsTaskContext.startTask (HeadlessJsTaskContext.java:92)
at com.facebook.react.HeadlessJsTaskService$2.run (HeadlessJsTaskService.java:125)
at android.os.Handler.handleCallback (Handler.java:790)
at android.os.Handler.dispatchMessage (Handler.java:99)
at android.os.Looper.loop (Looper.java:171)
at android.app.ActivityThread.main (ActivityThread.java:6656)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:873)

Any update on this? the error occurs in multiple Android versions 7-9 and others

[JaydeepJikadra]

Facing the Same Issue.

OS Version: 9

Device: ONEPLUS A6010

RAM Free: 28.8%

Disk Free: 52.2%

#0. Crashed: main
at com.facebook.react.jstasks.HeadlessJsTaskContext.startTask(HeadlessJsTaskContext.java:92)
at com.facebook.react.HeadlessJsTaskService$2.run(HeadlessJsTaskService.java:125)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6863)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

--

Fatal Exception: java.lang.IllegalStateException: Tried to start task BackgroundTask while in the foreground, but this is not allowed.
at com.facebook.react.jstasks.HeadlessJsTaskContext.startTask(HeadlessJsTaskContext.java:92)
at com.facebook.react.HeadlessJsTaskService$2.run(HeadlessJsTaskService.java:125)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6863)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

[sefam-vbastien]

It seems this is a behavior wanted by react native as stated here :
https://facebook.github.io/react-native/docs/headless-js-android

By default, your app will crash if you try to run a task while the app is in the foreground. This is to prevent developers from shooting themselves in the foot by doing a lot of work in a task and slowing the UI. You can pass a fourth boolean argument to control this behaviour.

Until you set this boolean to true this will crash.

The library does not set this boolean which means it is set to default (false)

react-native-background-task/android/src/main/java/com/jamesisaac/rnbackgroundtask/HeadlessTaskService.java

Line 26 in 3db6df1

return new HeadlessJsTaskConfig(

To fix this issue you have 2 choices:
Either you set the boolean to true but this will slow your UI if in foreground mode
Either you can do the isAppOnForeground check as state in the official documentation.

Hope this help.

[qlerebours]

I tried to set this boolean to true and it seems to be working fine.
Thank you

[vahidrn98]

i was facing this issue even after setting foreground attribute to true.
then i found out i was stupidly setting a periodic job with setInterval() function inside the task.
deleting that solved my problem.