[SERVER-22960] find command checks for shard version outside of collection lock Created: 04/Mar/16  Updated: 14/Apr/16  Resolved: 04/Mar/16

Status: Closed
Project: Core Server
Component/s: Sharding
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Major - P3
Reporter: Kaloian Manassiev Assignee: Kaloian Manassiev
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Operating System: ALL
Participants:

 Description   

The implementation of find command on mongod checks the shard version outside of collection lock. This means that the collection might change after it has been checked, but before the command actually starts returning results and thus it may return results, which do not belong to the shard being queried.

This should be easy to fix by moving the collection lock up.



 Comments   
Comment by Kaloian Manassiev [ 04/Mar/16 ]

The check for shard version is actually further down this code path, so no checking is happening outside of a lock.

Generated at Thu Feb 08 04:01:56 UTC 2024 using Jira 9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66.