KEN-LJQ opened a new issue #2368: [BUG] multiple browser tab cause cron scheduler trigger duplicate URL: https://github.com/apache/incubator-dolphinscheduler/issues/2368 **Describe the bug** We found some workflow will schedule two instance at the same time every day. Because it has set two Quartz Trigger, see the screenshots below  Since we can see that the difference is trigger group, the suffix means project id, so it indicate this workflow belong to difference project, which suppose to be wrong. After review the code, the project id comes from the set-scheduler-online-or-offline request, the value is pass by frontend  **To Reproduce** key operations: open two or more tabs, offline and online scheduler Assume we have to project: project-1, project-2, and workflow-A belong to project-1 1. Open the cron scheduler page of workflow-A 2. New a tab, and open another workflow of project-2 3. Refresh the cron scheduler page of workflow-A 4. Offline scheduler of workflow-A 5. Online scheduler of workflow-A After these step, the old cron trigger did not remove, but a new one was added, and the trigger group was difference **Which version of Dolphin Scheduler:** -[1.1.0] **Additional context** Using DolphinScheduler within only one tab can avoid this bug, but it's more convenience for developer if them open one more tab, so this bug may be trigger.
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