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https://issues.apache.org/jira/browse/OAK-2421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger resolved OAK-2421.
-----------------------------------
Resolution: Fixed
Fix Version/s: 1.1.6
Orphaned unmerged branches are now detected when created with the NodeStore
API. An unmerged branch becomes orphaned when the DocumentNodeStoreBuilder and
associated DocumentNodeStoreBranch is garbage collected. The implementation
tracks this with a weak reference to the DocumentNodeStoreBranch. Once the
DocumentNodeStoreBranch is weakly reachable and appended to the reference
queue, the branch is considered orphaned and cleaned up by the background
operations thread in DocumentNodeStore.
The background thread is not able to remove all persisted changes related to
the branch. It will only remove the branch commits and any collision markers
from the root document. The actual changes persisted with branch commits are
not removed because it would require a scan on the underlying data. This step
must be done by the full scale revision GC (OAK-1981). Some cleanup is already
done when a document is analyzed for splitting. The background split now also
removes changes from orphaned branch commits.
Done in trunk: http://svn.apache.org/r1653463
> Clean up orphaned branches
> --------------------------
>
> Key: OAK-2421
> URL: https://issues.apache.org/jira/browse/OAK-2421
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: core, mongomk
> Affects Versions: 1.0
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Fix For: 1.1.6
>
>
> This is a sub-task of OAK-1981 to clean up orphaned branches.
> Branch commits may not get merged because of conflicts and are currently not
> garbage collected. OAK-1926 cleans up the branch commit information on
> restart on the root document, but it does not remove the changes on the
> affected documents.
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