[SERVER-21765] Sharding balancer should check for shutdown more frequently Created: 03/Dec/15  Updated: 06/Dec/22  Resolved: 12/Dec/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: [DO NOT USE] Backlog - Sharding Team
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
Assigned Teams:
Sharding
Operating System: ALL
Participants:

 Description   

The mongos clean shutdown sequence blocks waiting for all currently held distributed locks to be freed in order to proceed with the shutdown. This means that if the balancer takes long time to complete the round it would block shutdown.

For this reason the balancer should be checking whether shutdown has been requested after each chunk has been migrated instead of once for the entire round.



 Comments   
Comment by Andy Schwerin [ 12/Dec/16 ]

As of 3.4, the balancer doesn't run on mongos anymore, and so no longer blocks mongos shutdown.

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