Marcel Reutegger created OAK-8300:
-------------------------------------
Summary: Revision GC may remove previous document without removing
reference
Key: OAK-8300
URL: https://issues.apache.org/jira/browse/OAK-8300
Project: Jackrabbit Oak
Issue Type: Bug
Components: documentmk
Affects Versions: 1.12.0
Reporter: Marcel Reutegger
Assignee: Marcel Reutegger
Depending on timing it may happen that the Revision GC removes a previous
document without updating the main document. This can only happen in a cluster
when modifications to a document happen on one cluster node and the Revision GC
runs on the other cluster node. Updating the main document on Revision GC fails
when the document was split after a background update that contained the latest
change on the document and the document is not updated anymore. On the cluster
node where the Revision GC runs, the document may then stay in the cache in a
state that doesn't reflect the split. When the Revision GC runs, the main
document from the cache will not show the reference to the previous document.
The Revision GC will print a log message that says like:
{noformat}
Split document 4:p/content/foo/r169f074b41f-0-1/0 for path
p/content/foo/r169f074b41f-0-1/0 not referenced anymore. Main document is
2:/content/foo
{noformat}
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