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What happened was that\na new worker notification would be sent to a callback\nwhile at the same time a task submission would come in\nand there would be a small race period where the task\nwould insert itself into the requests cache while the\ncallback was processing.\n\nSo to work around this the whole concept of a requests\ncache was revamped and now the WBE executor just maintains\nits own local dictionary of ongoing requests and accesses\nit safely.\n\nDuring the on_wait function that is periodically called\nby kombu the previous expiry of work happens but now any\nrequests that are pending are matched to any new workers\nthat may have appeared.\n\nThis avoids the race (and ensures that even if a new\nworker is found but a submission is in progress that the\nduration until that submission happens will only be until\nthe next on_wait call happens).\n\nRelated-Bug: #1431097\n\nChange-Id: I98b0caeedc77ab2f7214847763ae1eb0433d4a78\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/taskflow/commit/6b9d3c0bf22d7411ee53a0b711ad59ea468a1783"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/taskflow/commit/6b9d3c0bf22d7411ee53a0b711ad59ea468a1783"}]},"branch":"refs/heads/master"},"cea71f27998cfa911044103fcb8fca79b6989717":{"kind":"TRIVIAL_REBASE","_number":5,"created":"2016-02-05 22:41:22.000000000","uploader":{"_account_id":1297,"name":"Joshua Harlow","email":"jxharlow@godaddy.com","username":"harlowja"},"ref":"refs/changes/36/276536/5","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/taskflow","ref":"refs/changes/36/276536/5","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/taskflow refs/changes/36/276536/5 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/taskflow refs/changes/36/276536/5 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/taskflow refs/changes/36/276536/5 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/taskflow refs/changes/36/276536/5"}}},"commit":{"parents":[{"commit":"61efc31e965b8defac84aa494095fd3734f739eb","subject":"Merge \"Handle cases where exc_args can\u0027t be serialized as JSON in the WBE\"","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/taskflow/commit/61efc31e965b8defac84aa494095fd3734f739eb"}]}],"author":{"name":"Joshua Harlow","email":"harlowja@yahoo-inc.com","date":"2016-02-05 02:09:24.000000000","tz":-480},"committer":{"name":"Joshua Harlow","email":"harlowja@yahoo-inc.com","date":"2016-02-05 22:40:25.000000000","tz":-480},"subject":"Fix for WBE sporadic timeout of tasks","message":"Fix for WBE sporadic timeout of tasks\n\nThis fixes the sporadic of tasks that would happen\nunder certain circumstances. What happened was that\na new worker notification would be sent to a callback\nwhile at the same time a task submission would come in\nand there would be a small race period where the task\nwould insert itself into the requests cache while the\ncallback was processing.\n\nSo to work around this the whole concept of a requests\ncache was revamped and now the WBE executor just maintains\nits own local dictionary of ongoing requests and accesses\nit safely.\n\nDuring the on_wait function that is periodically called\nby kombu the previous expiry of work happens but now any\nrequests that are pending are matched to any new workers\nthat may have appeared.\n\nThis avoids the race (and ensures that even if a new\nworker is found but a submission is in progress that the\nduration until that submission happens will only be until\nthe next on_wait call happens).\n\nRelated-Bug: #1431097\n\nChange-Id: I98b0caeedc77ab2f7214847763ae1eb0433d4a78\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/taskflow/commit/cea71f27998cfa911044103fcb8fca79b6989717"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/taskflow/commit/cea71f27998cfa911044103fcb8fca79b6989717"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}