110247 2013-02-19 11:59:06 -0800 fast/workers/storage/interrupt-database.html asserts flakily 2013-02-20 13:12:48 -0800 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 enne mark.lam andersca ap beidson enne ggaren koivisto mark.lam michaeln sam oldest_to_newest 836622 0 enne 2013-02-19 11:59:06 -0800 See: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#showExpectations=true&tests=fast%2Fworkers%2Fstorage%2Finterrupt-database.html This seems to be happening across all platforms. Here's a Chromium Mac 10.7 (dbg) log: crash log for DumpRenderTree (pid 2446): STDOUT: <empty> STDERR: ERROR: Unable to turn on incremental auto-vacuum (0 not an error) STDERR: ../../third_party/WebKit/Source/WebCore/Modules/webdatabase/DatabaseBackend.cpp(327) : virtual bool WebCore::DatabaseBackend::performOpenAndVerify(bool, WebCore::DatabaseError &, WTF::String &) STDERR: ASSERTION FAILED: m_nextState == SQLTransactionState::Idle STDERR: ../../third_party/WebKit/Source/WebCore/Modules/webdatabase/SQLTransactionStateMachine.h(85) : void WebCore::SQLTransactionStateMachine<WebCore::SQLTransactionBackend>::setStateToRequestedState() [T = WebCore::SQLTransactionBackend] STDERR: 1 0x8b691ff WebCore::SQLTransactionStateMachine<WebCore::SQLTransactionBackend>::setStateToRequestedState() STDERR: 2 0x8b67e1d WebCore::SQLTransactionBackend::performNextStep() STDERR: 3 0x8b4e80f WebCore::DatabaseBackendAsync::DatabaseTransactionTask::doPerformTask() STDERR: 4 0x8b4e03e WebCore::DatabaseTask::performTask() STDERR: 5 0x8b4f762 WebCore::DatabaseThread::databaseThread() STDERR: 6 0x8b4f5a1 WebCore::DatabaseThread::databaseThreadStart(void*) 836662 1 mark.lam 2013-02-19 12:29:55 -0800 Thanks for reporting this. I'm looking into it. 836968 2 mark.lam 2013-02-19 16:43:58 -0800 Adrienne, can please note which svn rev your failing build is based on? Are you still seeing this with ToT? I can't seem to reproduce it on my end with ToT. Thanks. 836984 3 enne 2013-02-19 16:53:31 -0800 Happening in Chromium at ToT still, but it appears to have been happening for quite some time. The most recent is r143352 on a Win7(dbg). It doesn't appear to happen every time. See the flakiness dashboard link in the original description and click on one of the gold squares to see the revision number that ran at. 837416 4 koivisto 2013-02-20 06:27:42 -0800 *** Bug 110337 has been marked as a duplicate of this bug. *** 837417 5 koivisto 2013-02-20 06:28:45 -0800 The dupe has a few recent instances. 837577 6 mark.lam 2013-02-20 10:59:32 -0800 During an interruption, the SQLTransactionBackend will request its frontend to transit to state End. It then proceeds to put itself in state End. The frontend SQLTransaction will try to execute the state transition to End, and discovers the database being interrupted (this is our intent when we told it go to End). Instead, it will initiate clean up which also entails requesting that the SQLTransacionBackend transit to state CleanupAndTerminate. This is not a problem because the backend state machine will detect that the database interruption, repeat the cleanup (no harm), and go to state End anyway. That said, that last state transition is from state End to state End, and this makes the assertion unhappy. I'll provide a patch shortly to clean up the the state dispatch mechanism so that this assertion won't find itself in the interruption path where it does not belong. It only makes sense under normal circumstances. 837668 7 189360 mark.lam 2013-02-20 13:02:02 -0800 Created attachment 189360 the fix. 837672 8 189360 koivisto 2013-02-20 13:08:09 -0800 Comment on attachment 189360 the fix. r=me 837678 9 mark.lam 2013-02-20 13:12:48 -0800 Thanks for there review. Landed in r143489: <http://trac.webkit.org/changeset/143489>. 189360 2013-02-20 13:02:02 -0800 2013-02-20 13:08:08 -0800 the fix. bug-110247.patch text/plain 7903 mark.lam SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDE0MzQ4NCkKKysrIFNvdXJjZS9XZWJDb3JlL0NoYW5n ZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDIzIEBACisyMDEzLTAyLTIwICBNYXJrIExh bSAgPG1hcmsubGFtQGFwcGxlLmNvbT4KKworICAgICAgICBDbGVhbnVwIHRoZSBTUUxUcmFuc2Fj dGlvbiBhbmQgU1FMVHJhbnNhY3Rpb25CYWNrZW5kIHN0YXRlIGRpc3BhdGNoCisgICAgICAgIHRv IG9ubHkgaG9ub3IgYSBzdGF0ZSB0cmFuc2l0aW9uIHJlcXVlc3QgaWYgdGhlIGFzc29jaWF0ZWQg ZGF0YWJhc2UKKyAgICAgICAgaGFzbid0IGJlZW4gaW50ZXJydXB0ZWQuCisgICAgICAgIGh0dHBz Oi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xMTAyNDcuCisKKyAgICAgICAgUmV2 aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAgICAgICAgTm8gbmV3IHRlc3RzLgorCisgICAg 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