Marcel Reutegger created OAK-4345:
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Summary: Bulk update constructs malformed query
Key: OAK-4345
URL: https://issues.apache.org/jira/browse/OAK-4345
Project: Jackrabbit Oak
Issue Type: Bug
Components: core, mongomk
Affects Versions: 1.4.2, 1.4.1, 1.4
Reporter: Marcel Reutegger
Assignee: Marcel Reutegger
Fix For: 1.6
MongoDocumentStore constructs a malformed query for bulk update of new
documents. The query is:
{noformat}
{ "_id" : { "$not" : { "$exists" : "_modCount"}}}
{noformat}
while it actually should be:
{noformat}
{ "_id" : "<some-id>" , "_modCount" : { "$exists" : false}}
{noformat}
It doesn't seem to do any harm in a non-sharded deployment. The query does not
mistakenly match documents.
However there is a problem when MongoDB is shareded and the calls are routed
through mongos. The bulk update become very slow (more than a factor of 10). I
assume mongos cannot figure out where to route the bulk update and resorts to
executing the updates individually.
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