140443 2015-01-14 08:54:29 -0800 openDatabase intermittently triggers SecurityError: DOM Exception 18 in Chrome on iOS 2015-06-22 08:08:19 -0700 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) iPhone / iPad iOS 8.1 RESOLVED DUPLICATE 137760 P2 Normal --- 1 jkndrkn webkit-unassigned mcatanzaro nolan oldest_to_newest 1061184 0 jkndrkn 2015-01-14 08:54:29 -0800 Greetings, I have an application that depends on WebSQL on Chrome iOS. The openDatabase method intermittently throws SecurityError: DOM Exception 18. I am using Chrome version 39.0.2171.50 and iOS 8.1 running on an iPhone 5s. My team has also seen this error appear on iPhone 5 and the PouchDB team has seen it appear in their automated tests for iPhone [1]. Here is a test case that exposes the bug: http://bl.ocks.org/jkndrkn/fd0074554047c3c0d8ac Here is the specific code segments from the above test case that trigger the bug: var db = openDatabase('mydatabase', 1, 'mydatabase', 50000000); var db = openDatabase('mydatabase', '1', 'mydatabase', 50000000); The bug is _intermittent_, so it doesn't always appear. Sometimes it appears right away, sometimes it takes refreshing the page, clearing all browser data, and force-quitting and restarting the browser in some combination. I am not sure what specific situations result in triggering this bug. I do know that refreshing the page does not make the exception go away once it has been expressed. However, force-quitting the browser *does* make the exception go away. [1]: https://travis-ci.org/pouchdb/pouchdb/jobs/46726739#L1173 Thank you for your help with this issue. John David 1061192 1 nolan 2015-01-14 09:09:17 -0800 I have a similar demo that causes a DOM Exception 11 in Chrome for iOS. Not sure if it's related to the DOM Exception 18 issue, but it might be: http://bl.ocks.org/nolanlawson/2cf0c9839ea8b64439ba For some context, we are tracking this issue in PouchDB as well: https://github.com/pouchdb/pouchdb/issues/3382 1066147 2 nolan 2015-02-02 10:51:31 -0800 I can no longer repro. I'm using Chrome 40.0.2214.69 in iOS 8.1.3 on an iPhone 6 Plus. 1067885 3 jkndrkn 2015-02-09 12:40:58 -0800 I also can no longer reproduce on my iPhone 5 running iOS 8.1.3 and Chrome 40.X. 1103839 4 mcatanzaro 2015-06-22 08:08:19 -0700 *** This bug has been marked as a duplicate of bug 137760 ***