Kenneth Knowles created BEAM-2583:
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Summary: Exceptions in expand() corrupt the TransformHierarchy
Key: BEAM-2583
URL: https://issues.apache.org/jira/browse/BEAM-2583
Project: Beam
Issue Type: Bug
Components: sdk-java-core
Reporter: Kenneth Knowles
Priority: Minor
Discovered recently during unrelated work that when a composite PTransform
(Java) crashes during expand - for example due to a validation failure - it
leaves the Pipeline in a state that throws NPEs when it is traversed.
No one has complained, so it doesn't seem critical to fix the mutation logic.
But we should set a bit and poison all future uses of the corrupted pipeline.
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