[
https://issues.apache.org/jira/browse/OAK-4112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15187194#comment-15187194
]
Teodor Rosu commented on OAK-4112:
----------------------------------
In {{MongoDocumentStore#queryInternal}}, if cacheChanges is created and a db
exception is thrown after, then {{nodesCache.putNonConflictingDocs}} is not
called. As a result the {{NodeDocumentCache.changeTrackers}} could accumulate
objects.
> Replace the query exclusive lock with a cache tracker
> -----------------------------------------------------
>
> Key: OAK-4112
> URL: https://issues.apache.org/jira/browse/OAK-4112
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: documentmk, mongomk
> Reporter: Tomek Rękawek
> Fix For: 1.6
>
> Attachments: OAK-4112.patch
>
>
> The {{MongoDocumentStore#query()}} method uses an expensive
> {{TreeLock#acquireExclusive}} method, introduced in OAK-1897 to avoid caching
> outdated documents.
> It should be possible to avoid acquiring the exclusive lock, by tracking the
> cache changes that occurs during the Mongo find() operation. When the find()
> is done, we can update the cache with the received documents if they haven't
> been invalidated in the meantime.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
