The GitHub Actions job "Required Checks" on texera.git/loop-single-input has failed. Run started by GitHub user aglinxinyuan (triggered by aglinxinyuan).
Head commit for run: 63480b329986dcadb5b065188320bfa9a9dd199f / Xinyuan Lin <[email protected]> fix(workflow-operator): disallow multiple links into a loop operator's input port A Loop Start with two upstream operators feeding its single input port was accepted by the GUI but rejected at StartWorkflow with "expected exactly one reader URI, got 2" (discussion #6966). Nothing in the editor hinted that the plan was invalid until the run failed. InputPort already has a `disallowMultiLinks` flag that the frontend honors in two places -- the editor refuses to draw a second link into such a port (workflow-editor.component.ts) and workflow validation requires exactly one input (validation-workflow.service.ts, via WorkflowUtilService.inputPortToPortDescription which maps the backend flag onto the operator predicate). The loop operators simply never set it. Set it on the shared LoopOpDesc input port, so it applies to both Loop Start and Loop End: every reader on a materialized input port replays that port's states independently, so a second link would deliver the loop state twice per iteration (double `update`, double back-edge), and a Loop Start additionally needs a single reader for the scheduler to resolve its bookkeeping URIs from. No frontend change is needed. The scheduler's `require` stays as a defense-in-depth backstop for programmatically built plans. Report URL: https://github.com/apache/texera/actions/runs/30603079317 With regards, GitHub Actions via GitBox
