Type:
Bug
Priority:
Major
Resolution:
Fixed
Affects Version/s:
10.6
Environment:
Ubuntu 20.04
How to repeat:
/* init */ CREATE TABLE t(a INT , b INT );
/* init */ INSERT INTO t VALUES ( null , 1), (1, 1);
/* s1 */ SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED ;
/* s2 */ SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED ;
/* s1 */ BEGIN ;
/* s2 */ BEGIN ;
/* s1 */ UPDATE t SET b=3;
/* s2 */ UPDATE t SET b=2 WHERE a;
/* s1 */ UPDATE t SET a=1;
/* s1 */ COMMIT ;
/* s2 */ COMMIT ;
/* s1 */ SELECT * FROM t; -- actual: [(1, 3), (1 ,2)], expected: [(1, 2), (1, 2)]
The UPDATE statement of s2 was initially blocked by s1. It recovered after s1's COMMIT, but its query result is incorrect, even though in innodb_snapshot_isolation = ON mode. I found that this case is very similar to MDEV-26643 , but MDEV-26643 has already been fixed in innodb_snapshot_isolation = ON mode by disabling semi-consistent read.
relates to
MDEV-26643
Inconsistent behaviors of UPDATE under RU & RC isolation level
Closed
{"report":{"fcp":832.7000000476837,"ttfb":163.29999995231628,"pageVisibility":"visible","entityId":129056,"key":"jira.project.issue.view-issue","isInitial":true,"threshold":1000,"elementTimings":{},"userDeviceMemory":8,"userDeviceProcessors":64,"apdex":1,"journeyId":"dbec165c-f428-43ed-851d-fc61ac513e9a","navigationType":0,"readyForUser":892.7999999523163,"redirectCount":0,"resourceLoadedEnd":1274.4000000953674,"resourceLoadedStart":168.90000009536743,"resourceTiming":[{"duration":229.09999990463257,"initiatorType":"link","name":"https://jira.mariadb.org/s/2c21342762a6a02add1c328bed317ffd-CDN/lu2bu7/820016/12ta74/0a8bac35585be7fc6c9cc5a0464cd4cf/_/download/contextbatch/css/_super/batch.css","startTime":168.90000009536743,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":168.90000009536743,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":398,"responseStart":0,"secureConnectionStart":0},{"duration":229,"initiatorType":"link","name":"https://jira.mariadb.org/s/7ebd35e77e471bc30ff0eba799ebc151-CDN/lu2bu7/820016/12ta74/8679b4946efa1a0bb029a3a22206fb5d/_/download/contextbatch/css/jira.browse.project,project.issue.navigator,jira.view.issue,jira.general,jira.global,atl.general,-_super/batch.css?agile_global_admin_condition=true&jag=true&jira.create.linked.issue=true&slack-enabled=true","startTime":169.09999990463257,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":169.09999990463257,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":398.09999990463257,"responseStart":0,"secureConnectionStart":0},{"duration":239,"initiatorType":"script","name":"https://jira.mariadb.org/s/fbf975c0cce4b1abf04784eeae9ba1f4-CDN/lu2bu7/820016/12ta74/0a8bac35585be7fc6c9cc5a0464cd4cf/_/download/contextbatch/js/_super/batch.js?locale=en","startTime":169.20000004768372,"connectEnd":169.20000004768372,"connectStart":169.20000004768372,"domainLookupEnd":169.20000004768372,"domainLookupStart":169.20000004768372,"fetchStart":169.20000004768372,"redirectEnd":0,"redirectStart":0,"requestStart":169.20000004768372,"responseEnd":408.2000000476837,"responseStart":408.2000000476837,"secureConnectionStart":169.20000004768372},{"duration":283,"initiatorType":"script","name":"https://jira.mariadb.org/s/099b33461394b8015fc36c0a4b96e19f-CDN/lu2bu7/820016/12ta74/8679b4946efa1a0bb029a3a22206fb5d/_/download/contextbatch/js/jira.browse.project,project.issue.navigator,jira.view.issue,jira.general,jira.global,atl.general,-_super/batch.js?agile_global_admin_condition=true&jag=true&jira.create.linked.issue=true&locale=en&slack-enabled=true","startTime":169.40000009536743,"connectEnd":169.40000009536743,"connectStart":169.40000009536743,"domainLookupEnd":169.40000009536743,"domainLookupStart":169.40000009536743,"fetchStart":169.40000009536743,"redirectEnd":0,"redirectStart":0,"requestStart":169.40000009536743,"responseEnd":452.40000009536743,"responseStart":452.40000009536743,"secureConnectionStart":169.40000009536743},{"duration":286.5,"initiatorType":"script","name":"https://jira.mariadb.org/s/94c15bff32baef80f4096a08aceae8bc-CDN/lu2bu7/820016/12ta74/c92c0caa9a024ae85b0ebdbed7fb4bd7/_/download/contextbatch/js/atl.global,-_super/batch.js?locale=en","startTime":169.5,"connectEnd":169.5,"connectStart":169.5,"domainLookupEnd":169.5,"domainLookupStart":169.5,"fetchStart":169.5,"redirectEnd":0,"redirectStart":0,"requestStart":169.5,"responseEnd":456,"responseStart":456,"secureConnectionStart":169.5},{"duration":286.90000009536743,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:calendar-en/jira.webresources:calendar-en.js","startTime":169.59999990463257,"connectEnd":169.59999990463257,"connectStart":169.59999990463257,"domainLookupEnd":169.59999990463257,"domainLookupStart":169.59999990463257,"fetchStart":169.59999990463257,"redirectEnd":0,"redirectStart":0,"requestStart":169.59999990463257,"responseEnd":456.5,"responseStart":456.5,"secureConnectionStart":169.59999990463257},{"duration":287.2000000476837,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:calendar-localisation-moment/jira.webresources:calendar-localisation-moment.js","startTime":169.70000004768372,"connectEnd":169.70000004768372,"connectStart":169.70000004768372,"domainLookupEnd":169.70000004768372,"domainLookupStart":169.70000004768372,"fetchStart":169.70000004768372,"redirectEnd":0,"redirectStart":0,"requestStart":169.70000004768372,"responseEnd":456.90000009536743,"responseStart":456.90000009536743,"secureConnectionStart":169.70000004768372},{"duration":287.7000000476837,"initiatorType":"link","name":"https://jira.mariadb.org/s/b04b06a02d1959df322d9cded3aeecc1-CDN/lu2bu7/820016/12ta74/a2ff6aa845ffc9a1d22fe23d9ee791fc/_/download/contextbatch/css/jira.global.look-and-feel,-_super/batch.css","startTime":169.79999995231628,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":169.79999995231628,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":457.5,"responseStart":0,"secureConnectionStart":0},{"duration":287.7000000476837,"initiatorType":"script","name":"https://jira.mariadb.org/rest/api/1.0/shortcuts/820016/47140b6e0a9bc2e4913da06536125810/shortcuts.js?context=issuenavigation&context=issueaction","startTime":169.79999995231628,"connectEnd":169.79999995231628,"connectStart":169.79999995231628,"domainLookupEnd":169.79999995231628,"domainLookupStart":169.79999995231628,"fetchStart":169.79999995231628,"redirectEnd":0,"redirectStart":0,"requestStart":169.79999995231628,"responseEnd":457.5,"responseStart":457.5,"secureConnectionStart":169.79999995231628},{"duration":288,"initiatorType":"link","name":"https://jira.mariadb.org/s/3ac36323ba5e4eb0af2aa7ac7211b4bb-CDN/lu2bu7/820016/12ta74/d176f0986478cc64f24226b3d20c140d/_/download/contextbatch/css/com.atlassian.jira.projects.sidebar.init,-_super,-project.issue.navigator,-jira.view.issue/batch.css?jira.create.linked.issue=true","startTime":170,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":170,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":458,"responseStart":0,"secureConnectionStart":0},{"duration":288.10000014305115,"initiatorType":"script","name":"https://jira.mariadb.org/s/3339d87fa2538a859872f2df449bf8d0-CDN/lu2bu7/820016/12ta74/d176f0986478cc64f24226b3d20c140d/_/download/contextbatch/js/com.atlassian.jira.projects.sidebar.init,-_super,-project.issue.navigator,-jira.view.issue/batch.js?jira.create.linked.issue=true&locale=en","startTime":170.09999990463257,"connectEnd":170.09999990463257,"connectStart":170.09999990463257,"domainLookupEnd":170.09999990463257,"domainLookupStart":170.09999990463257,"fetchStart":170.09999990463257,"redirectEnd":0,"redirectStart":0,"requestStart":170.09999990463257,"responseEnd":458.2000000476837,"responseStart":458.2000000476837,"secureConnectionStart":170.09999990463257},{"duration":580,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:bigpipe-js/jira.webresources:bigpipe-js.js","startTime":170.79999995231628,"connectEnd":170.79999995231628,"connectStart":170.79999995231628,"domainLookupEnd":170.79999995231628,"domainLookupStart":170.79999995231628,"fetchStart":170.79999995231628,"redirectEnd":0,"redirectStart":0,"requestStart":170.79999995231628,"responseEnd":750.7999999523163,"responseStart":750.7999999523163,"secureConnectionStart":170.79999995231628},{"duration":1103.5,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:bigpipe-init/jira.webresources:bigpipe-init.js","startTime":170.90000009536743,"connectEnd":170.90000009536743,"connectStart":170.90000009536743,"domainLookupEnd":170.90000009536743,"domainLookupStart":170.90000009536743,"fetchStart":170.90000009536743,"redirectEnd":0,"redirectStart":0,"requestStart":170.90000009536743,"responseEnd":1274.4000000953674,"responseStart":1274.4000000953674,"secureConnectionStart":170.90000009536743},{"duration":592.7000000476837,"initiatorType":"xmlhttprequest","name":"https://jira.mariadb.org/rest/webResources/1.0/resources","startTime":634.5,"connectEnd":634.5,"connectStart":634.5,"domainLookupEnd":634.5,"domainLookupStart":634.5,"fetchStart":634.5,"redirectEnd":0,"redirectStart":0,"requestStart":634.5,"responseEnd":1227.2000000476837,"responseStart":1227.2000000476837,"secureConnectionStart":634.5},{"duration":468.2999999523163,"initiatorType":"script","name":"https://www.google-analytics.com/analytics.js","startTime":810.5,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":810.5,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":1278.7999999523163,"responseStart":0,"secureConnectionStart":0}],"fetchStart":0,"domainLookupStart":0,"domainLookupEnd":0,"connectStart":0,"connectEnd":0,"requestStart":3,"responseStart":163,"responseEnd":166,"domLoading":166,"domInteractive":1322,"domContentLoadedEventStart":1322,"domContentLoadedEventEnd":1359,"domComplete":2153,"loadEventStart":2153,"loadEventEnd":2155,"userAgent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)","marks":[{"name":"bigPipe.sidebar-id.start","time":1304.7999999523163},{"name":"bigPipe.sidebar-id.end","time":1305.7000000476837},{"name":"bigPipe.activity-panel-pipe-id.start","time":1305.7999999523163},{"name":"bigPipe.activity-panel-pipe-id.end","time":1308.2000000476837},{"name":"activityTabFullyLoaded","time":1365}],"measures":[],"correlationId":"440e59daebf752","effectiveType":"4g","downlink":9.7,"rtt":0,"serverDuration":76,"dbReadsTimeInMs":16,"dbConnsTimeInMs":23,"applicationHash":"9d11dbea5f4be3d4cc21f03a88dd11d8c8687422","experiments":[]}}