25788 2009-05-14 04:57:35 -0700 Reloading a page while a database transaction is in progress leaves the database locked. 2009-05-19 14:26:30 -0700 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) All All RESOLVED DUPLICATE 25711 P2 Normal --- 0 benm webkit-unassigned oldest_to_newest 121267 0 benm 2009-05-14 04:57:35 -0700 If the user navigates away from a page whilst a database transaction is in progress, the database lock is never released and subsequent accesses to that database fail. This is what I think is happening: - The transaction starts. - Whilst the transaction is still executing, the user reloads the page. - In the document::stopAllDatabases method, the database is stopped and the database thread asked to die. - The page reloads. - The transaction eventually finishes executing and schedules it's next step in the database thread. However the database thread was asked to die, and so is about to complete, which means the next transaction step is never executed and so the transaction is never committed or rolled back. So, the lock on the database file is never released. I have a patch to fix and a layout test to verify in the works, should be ready soon. 121319 1 30343 benm 2009-05-14 09:27:11 -0700 Created attachment 30343 Proposed fix. This patch fixes the bug by setting a busy handler for database transactions and running the error steps synchronously should the database the transaction was running on be stopped whilst it is running. The busy handler is needed to make transactions on the new page wait for the old transaction to complete and roll back before running. 121973 2 benm 2009-05-19 14:24:50 -0700 *** This bug has been marked as a duplicate of 25711 *** 30343 2009-05-14 09:27:11 -0700 2009-05-19 14:26:30 -0700 Proposed fix. lock-patch-140509.txt text/plain 11393 benm SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiA0MzcwNykKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMjEgQEAKKzIwMDktMDUtMTQgIEJlbiBNdXJkb2NoICA8YmVubUBnb29nbGUuY29t PgorCisgICAgICAgIElmIGEgZGF0YWJhc2UgdHJhbnNhY3Rpb24gaXMgaW50ZXJydXB0ZWQgYnkg YSBuYXZpZ2F0aW9uIGFjdGlvbiwgdGhlIGxvY2sgb24gdGhhdCBkYXRhYmFzZSBpcyBuZXZlciBy ZWxpbnF1aXNoZWQgYW5kIHN1YnNlcXVlbnQgYWNjZXNzZXMgdG8gdGhhdCBkYXRhYmFzZSBmYWls LgorICAgICAgICAKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dp 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