Michael Dürig created OAK-8033:
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Summary: Node states sometimes refer to more than a single
generation of segments after a full compaction
Key: OAK-8033
URL: https://issues.apache.org/jira/browse/OAK-8033
Project: Jackrabbit Oak
Issue Type: Bug
Components: segment-tar
Affects Versions: 1.8.11, 1.6.16, 1.8.10, 1.10.0, 1.10
Reporter: Michael Dürig
Assignee: Michael Dürig
Due to a regression introduced with OAK-7867 a full compaction can sometimes
cause nodes that are written concurrently to reference segments from more than
a single gc generation.
This happens when the {{borrowWriter}} method needs to [create a new
writer|https://github.com/apache/jackrabbit-oak/blob/trunk/oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentBufferWriterPool.java#L197-L201].
In this case the new writer will be of the generation of the current head
state instead of the generation associated with the current write operation in
progress.
cc [~frm], [~ahanikel]
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