Fix mini scheduler expansion of mapped task #27506
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We have a case where the mini scheduler tries to expand a mapped task even when the downstream tasks are not yet done. The mini scheduler extracts a partial subset of a dag and in the process, some upstream tasks are dropped. If the task happens to be a mapped task, the expansion will fail since it needs the upstream output to make the expansion. When the expansion fails, the task is marked as `upstream_failed`. This leads to other downstream tasks being marked as upstream failed. The solution was to ignore this error and not mark the mapped task as upstream_failed when the expansion fails and the dag is a partial subset
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Co-authored-by: Ash Berlin-Taylor <[email protected]>
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We have a case where the mini scheduler tries to expand a mapped task even when the downstream tasks are not yet done. The mini scheduler extracts a partial subset of a dag and in the process, some upstream tasks are dropped. If the task happens to be a mapped task, the expansion will fail since it needs the upstream output to make the expansion. When the expansion fails, the task is marked as `upstream_failed`. This leads to other downstream tasks being marked as upstream failed. The solution was to ignore this error and not mark the mapped task as upstream_failed when the expansion fails and the dag is a partial subset Co-authored-by: Ash Berlin-Taylor <[email protected]> (cherry picked from commit ed92e5d)
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We have a case where the mini scheduler tries to expand a mapped task even when the downstream tasks are not yet done. The mini scheduler extracts a partial subset of a dag and in the process, some upstream tasks are dropped. If the task happens to be a mapped task, the expansion will fail since it needs the upstream output to make the expansion. When the expansion fails, the task is marked as `upstream_failed`. This leads to other downstream tasks being marked as upstream failed. The solution was to ignore this error and not mark the mapped task as upstream_failed when the expansion fails and the dag is a partial subset Co-authored-by: Ash Berlin-Taylor <[email protected]> (cherry picked from commit ed92e5d)
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We have a case where the mini scheduler tries to expand a mapped task even when the downstream tasks are not yet done.
The mini scheduler extracts a partial subset of a dag and in the process, some upstream tasks are dropped.
If the task happens to be a mapped task, the expansion will fail since it needs the upstream output to make the expansion. When the expansion fails, the task is marked as
upstream_failed. This leads to other downstream tasks being marked as upstream failed.The solution was to ignore this error and not mark the mapped task as upstream_failed when the expansion fails and the dag is a partial subset
closes: #27449