Jukka Zitting created OAK-1810:
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Summary: Incorrect TarMK graph metadata validation
Key: OAK-1810
URL: https://issues.apache.org/jira/browse/OAK-1810
Project: Jackrabbit Oak
Issue Type: Bug
Components: segmentmk
Reporter: Jukka Zitting
Assignee: Jukka Zitting
Priority: Minor
When reading the pre-compiled graph entries from OAK-1780, the TarMK uses a few
sanity checks to verify that the graph hasn't been corrupted and that using it
for the cleanup operation is safe.
It turns out that one of these sanity checks ({{bytes >= count * 24 + 16}}) is
overly strict, as the minimum size limit for the graph entry is instead {{count
* 16 + 16}}. The "24" factor applies only when sanity of the the tar index
entry.
The effect of this bug is not very critical, as a graph entry that fails the
check will just be ignored with a warning and the cleanup code will fall back
to the slower algorithm of instead reading the segment graph directly from the
stored data segments.
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