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[Bug]: Bug in the workflow JOIN action #8063
Description
Apache Hop version?
2.20
Java version?
21
Operating system
Linux
What happened?
If a workflow contains multiple parallel flows and a JOIN transformation is used to wait for their completion, the process will wait indefinitely if an error occurs in just one of the branches. From what I have observed, the JOIN transformation does not recognize the error unless it is explicitly connected to the JOIN transformation itself.
Issue Priority
Priority: 3
Issue Component
Component: Transforms
Activity
hansva commentedon Aug 21, 2026
Could you add a simple reproduction file please
nadment commentedon Aug 21, 2026
Confirmed
[-][Bug]: Bug in the workflow JOIN transformation[/-][+][Bug]: Bug in the workflow JOIN action[/+]leehaut commentedon Aug 25, 2026
.take-issue
gmitter-ef commentedon Oct 7, 2026
Just wanted to add that this behaviour is also observed when before the "Dummy" action a "simple-evaluation" action blocks a dummy from being executed (correctly). So not only errors, but also explicit non-execution by business logic leads to this "hanging" behaviour.