[TIMOB-1544] Android: Problems pausing/resuming app: ConcurrentModificationException

GitHub Issue	n/a
Type	Bug
Priority	Medium
Status	Closed
Resolution	Fixed
Resolution Date	2011-04-17T01:56:28.000+0000
Affected Version/s	n/a
Fix Version/s	Release 1.5.0 M01
Components	Android
Labels	android, defect
Reporter	Bill Dawson
Assignee	Bill Dawson
Created	2011-04-15T02:55:40.000+0000
Updated	2011-04-17T01:56:28.000+0000

Description

See also helpdesk ticket 35861. Appears to be concurrency problem in TiContext's lifecycleListeners list. Relevant portion of trace:

E/TiUncaughtHandler( 2291): (main) [11,1437] Sending event: exception on thread: main msg:java.lang.RuntimeException: Unable to pause activity {com.xxxx.XxxxMobile/com.xxxx.XxxxMobile.GetxxxxActivity}: java.util.ConcurrentModificationException
E/TiUncaughtHandler( 2291): java.lang.RuntimeException: Unable to pause activity {com.xxxx.XxxxMobile/com.xxxx.XxxxMobile.GetxxxxActivity}: java.util.ConcurrentModificationException
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3567)
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3524)
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3507)
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread.access$2500(ActivityThread.java:135)
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2143)
E/TiUncaughtHandler( 2291):     at android.os.Handler.dispatchMessage(Handler.java:99)
E/TiUncaughtHandler( 2291):     at android.os.Looper.loop(Looper.java:144)
E/TiUncaughtHandler( 2291):     at android.app.ActivityThread.main(ActivityThread.java:4937)
E/TiUncaughtHandler( 2291):     at java.lang.reflect.Method.invokeNative(Native Method)
E/TiUncaughtHandler( 2291):     at java.lang.reflect.Method.invoke(Method.java:521)
E/TiUncaughtHandler( 2291):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/TiUncaughtHandler( 2291):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/TiUncaughtHandler( 2291):     at dalvik.system.NativeStart.main(Native Method)
E/TiUncaughtHandler( 2291): Caused by: java.util.ConcurrentModificationException
E/TiUncaughtHandler( 2291):     at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573)

Comments

Jeff Haynie 2011-04-15

(from [dcf2e8e31524d85c8a75045b31bcd30262304ccf]) [#1544 state:open] Try to avoid concurrency problem with lifecycleListener list by synchronizing. http://github.com/appcelerator/titanium_mobile/commit/dcf2e8e31524d85c8a75045b31bcd30262304ccf"> http://github.com/appcelerator/titanium_mobile/commit/dcf2e8e31524d...
Marshall Culpepper 2011-04-15

Bump, checking to see if we can mark this as fixed?
Bill Dawson 2011-04-15

Closing as resolved because ...

a) We couldn't reproduce it at will here;
b) I modified lifecycleListeners (made it a synchronized list) to help avoid concurrency issues;
c) The bigger underlying problem was conquered in #1545.

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