Thomas Mueller created OAK-537:
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Summary: The Property2Index eagerly and unnecessarily fetches all
data
Key: OAK-537
URL: https://issues.apache.org/jira/browse/OAK-537
Project: Jackrabbit Oak
Issue Type: Bug
Reporter: Thomas Mueller
Priority: Minor
Currently, the Property2Index (as well as the PropertyIndex and the
NodeTypeIndex) loads all paths into a hash set. This is even the case for the
getCost operation, which should be fast and therefore not load too much data.
This strategy can cause ouf-of-memory if the result is too big. Also, loading
all data is not necessary unless the user reads all rows.
Instead, the index should only load data on demand. Also, the getCost operation
should only estimate the number of read nodes, and not actually read the data.
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