Michael Dürig created OAK-2900:
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Summary: Trying to remove a non existing element from a map might
cause NPE
Key: OAK-2900
URL: https://issues.apache.org/jira/browse/OAK-2900
Project: Jackrabbit Oak
Issue Type: Bug
Components: segmentmk
Reporter: Michael Dürig
Fix For: 1.3.0
Calling {{SegmentWriter.writeMap(base, changes)}} with {{changes}} containing
mappings to {{null}} (meaning to remove the respective key) can result in a
{{NPE}} if {{base}} doesn't contain that key.
I came across this while working on the {{PersistedCompactionMap}} in OAK-2862.
I had to add an [extra check |
https://github.com/mduerig/jackrabbit-oak/blob/OAK-2862/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/PersistedCompactionMap.java#L188]
for above case as otherwise I'd occasionally hit said {{NPE}}.
Need yet to extract a proper test case.
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