Kurtt.Lin created S4-142:
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Summary: Deep cloning for triggers is needed upon a new PE
instance’s creation
Key: S4-142
URL: https://issues.apache.org/jira/browse/S4-142
Project: Apache S4
Issue Type: Bug
Affects Versions: 0.6
Reporter: Kurtt.Lin
Fix For: 0.7
The createPE(String id) method in ProcessingElement returns a cloned instance
of the prototype. However, the way an instance's triggers map is cloned is
incorrect:
bq. pe.triggers = Maps.newHashMap(triggers);
It's a shallow cloning; every instance shares the same trigger for a certain
event type.
Or, if the eventCount/lastTime in a trigger is shared across the instances by
design, then checkAndUpdate() should be guarded to prevent parallel writing.
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