Marcel Reutegger created OAK-2592:
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Summary: Commit does not ensure w:majority
Key: OAK-2592
URL: https://issues.apache.org/jira/browse/OAK-2592
Project: Jackrabbit Oak
Issue Type: Bug
Components: core, mongomk
Reporter: Marcel Reutegger
Assignee: Marcel Reutegger
Fix For: 1.4
The MongoDocumentStore uses {{findAndModify()}} to commit a transaction. This
operation does not allow an application specified write concern and always uses
the MongoDB default write concern {{Acknowledged}}. This means a commit may not
make it to a majority of a replica set when the primary fails. From a
MongoDocumentStore perspective it may appear as if a write was successful and
later reverted. See also the test in OAK-1641.
To fix this, we'd probably have to change the MongoDocumentStore to avoid
{{findAndModify()}} and use {{update()}} instead.
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