[SERVER-28049] List Databases command should apply filter on name only before database locks Created: 17/Feb/17  Updated: 05/Apr/17  Resolved: 20/Feb/17

Status: Closed
Project: Core Server
Component/s: Storage
Affects Version/s: None
Fix Version/s: 3.4.3, 3.5.4

Type: Bug Priority: Major - P3
Reporter: Louisa Berger Assignee: Geert Bosch
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Backports
Depends
Backwards Compatibility: Fully Compatible
Operating System: ALL
Backport Requested:
v3.4
Sprint: Storage 2017-03-06
Participants:

 Description   

Right now, the listDatabases command checks for locks on each database (https://github.com/mongodb/mongo/blob/d7bd800d3d06004c4ca9114627ee882442e4d5e4/src/mongo/db/commands/list_databases.cpp#L129-L146) before actually checking the filter on the query (https://github.com/mongodb/mongo/blob/d7bd800d3d06004c4ca9114627ee882442e4d5e4/src/mongo/db/commands/list_databases.cpp#L148-L151).

This means that if any user is doing a command that takes a lock on database a, (i.e. building an index), no one can run a listDatabase command, even if they've used a filter that should exclude database a.

cc geert.bosch



 Comments   
Comment by Githook User [ 03/Mar/17 ]

Author:

{u'username': u'GeertBosch', u'name': u'Geert Bosch', u'email': u'geert@mongodb.com'}

Message: SERVER-28049 Apply name-only filters before locking in listDatabases

(cherry picked from commit ef5a80fb0f1900d3e82dc8c60a536f17dd4d1268)
Branch: v3.4
https://github.com/mongodb/mongo/commit/41ca3715262d3411bf2dad031318bea92795288a

Comment by Githook User [ 20/Feb/17 ]

Author:

{u'username': u'GeertBosch', u'name': u'Geert Bosch', u'email': u'geert@mongodb.com'}

Message: SERVER-28049 Apply name-only filters before locking in listDatabases
Branch: master
https://github.com/mongodb/mongo/commit/ef5a80fb0f1900d3e82dc8c60a536f17dd4d1268

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