[CB-10276] cordova-ios@4 is unstable

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: cordova-ios
• Labels: cordova-ios-4.1.0

Environment

cordova@5.4.1 cordova-ios@4.0.1

• Assignee: Unassigned
• Reporter: Kirill Anoshin
• Created: 29/Dec/15 06:36
• Updated: 23/Aug/18 06:59
• Resolved: 27/Feb/16 00:03

Description

Here is a demo project to reproduce unstable behavior - https://github.com/kanoshin/cordova-bug-reproduction. You can try to run this app ~20 times and I'm sure that you will be able to reproduce huge memory leak and 100% cpu usage (both on real device and emulator). This app shows current state on the screen - "Done!" means that everything is fine, any other state is most likely a marker of 100% cpu usage.

This app is using 3rd party plugin that works stable on previous versions of cordova-ios. After some research I noticed that unstable behavior disappears if I wrap all plugin calls in:

[self.commandDelegate runInBackground:^{
    ...
}];

block. Otherwise WebThread sometimes goes crazy and device becomes unresponsive. I believe that this is a bug because previously it was ok to run plugin calls that takes small amount of time in the main thread. Also it seems that a lot of existing plugins don't care about running in background thread and it makes update to cordova-ios@4 impossible.

Issue Links

• is related to: CB-10530 App freezes sometimes directly after starting on iOS