Nick Richards created CB-1316:
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Summary: Lose contents of localStorage if backed up while Journal
emptying: "Error: database disk image is malformed"
Key: CB-1316
URL: https://issues.apache.org/jira/browse/CB-1316
Project: Apache Cordova
Issue Type: Bug
Affects Versions: 1.8.1
Environment: iOS 5.1+
Reporter: Nick Richards
Priority: Critical
The v1.6.1 workaround/fix CB-330 for iOS 5.1's localStorage iCloud-related
file-deletion allows me to use localStorage in my app. However localStorage is
sporadically and thereafter persistently blank when I relaunch my application.
Further, when I Download the application via Xcode Organizer to my Mac and open
it using SQLITE3 the database is reported to be corrupt: "Error: database disk
image is malformed" is what sqlite says. This is seen in
[xcappdata]/AppData/Documents/Backups/localstorage.appdata.db as well as
AppData/Library/Caches/file__0.localstorage, after an app exit and restart.
Sometimes I must time things to rapidly exit after writing to the database for
this situation to occur. Also my application is set to exit when the user
backgrounds it, via the info.plist "Application does not run in background"
(aka UIApplicationExitsOnSuspend = YES) setting.
I expect the localStorage DB to not be corrupted / blank when I resume my
application.
I once saw a SQLITE DB Journal file show up:
AppData/Library/Caches/file__0.localstorage.journal in Xcode's Organizer window
while I was using my app. This got me thinking that Cordova's
https://github.com/apache/incubator-cordova-ios/blob/master/CordovaLib/Classes/CDVLocalStorage.m
CB-330 implementation needs a tweak: wait to perform the backup until after
the Journal file has been written. I figure if Cordova backs-up the database
while the Journal is still being emptied then we'll get a corrupted
localStorage!
Thank you,
Nick
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