Marcel Reutegger created OAK-1295:
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Summary: Recovery for missing _lastRev updates
Key: OAK-1295
URL: https://issues.apache.org/jira/browse/OAK-1295
Project: Jackrabbit Oak
Issue Type: Improvement
Components: core, mongomk
Reporter: Marcel Reutegger
Fix For: 0.15
The _lastRev fields are periodically written to MongoDB with a background
thread.
This means there may be missing _lastRev updates when an Oak instance crashes.
There must be a recovery mechanism in place when an Oak instance starts up.
MongoMK needs to read the most recent _lastRev for the local cluster id and get
documents with a _modified timestamp at _lastRev or newer. These are candidates
for missing _lastRev updates. The _lastRev must only be updated for committed
non-branch changes.
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