[SERVER-66074] Remove usage of toArray in collection_defragmentation.js Created: 29/Apr/22  Updated: 29/Oct/23  Resolved: 31/May/22

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: 6.0.0-rc10, 6.1.0-rc0

Type: Bug Priority: Major - P3
Reporter: Allison Easton Assignee: Allison Easton
Resolution: Fixed Votes: 0
Labels: sharding-wfbf-day
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:
v6.0
Steps To Reproduce:

Setting numChunks to >130 and running in concurrency_sharded_with_stepdowns_and_balancer ensures this failure happens pretty regularly

Sprint: Sharding EMEA 2022-06-13
Participants:
Linked BF Score: 29

 Description   

The mergeChunks state of collection_defragmentation.js gets all chunks from config.collections using toArray. If there are a lot of chunks (usually >100 needed) this can require a call to getMore which will fail if the test is being run on a suite that involves stepdowns (concurrency_sharded_with_stepdowns_and_balancer, concurrency_sharded_kill_primary_with_balancer, etc.).

In order to allow the test to continue running on these suites, we should remove the call to toArray and simply check a random subset of the chunks for mergeability in each mergeChunks phase so that getMore is not called.



 Comments   
Comment by Githook User [ 10/Jun/22 ]

Author:

{'name': 'Allison Easton', 'email': 'allison.easton@mongodb.com', 'username': 'allisoneaston'}

Message: SERVER-66074 Remove usage of toArray in collection_defragmentation.js

(cherry picked from commit 2a61fb48311b141c92bb0185fe7cb3caa0480ac0)
Branch: v6.0
https://github.com/mongodb/mongo/commit/774260fa0e3fb862e8cc7a31862c72196e5683c0

Comment by Githook User [ 31/May/22 ]

Author:

{'name': 'Allison Easton', 'email': 'allison.easton@mongodb.com', 'username': 'allisoneaston'}

Message: SERVER-66074 Remove usage of toArray in collection_defragmentation.js
Branch: master
https://github.com/mongodb/mongo/commit/2a61fb48311b141c92bb0185fe7cb3caa0480ac0

Generated at Thu Feb 08 06:04:24 UTC 2024 using Jira 9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66.