[SERVER-35656] Ensure a 4.0 mongos crashes upon attempting to connect to an FCV 4.2 cluster Created: 18/Jun/18  Updated: 29/Oct/23  Resolved: 02/Jul/18

Status: Closed
Project: Core Server
Component/s: Sharding, Upgrade/Downgrade
Affects Version/s: None
Fix Version/s: 4.1.1

Type: Task Priority: Major - P3
Reporter: Maria van Keulen Assignee: Blake Oler
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
is documented by DOCS-12085 Docs for SERVER-35656: Ensure a 4.0 m... Closed
Gantt Dependency
has to be done after SERVER-35169 Bump wire protocol version for 4.2 Closed
Backwards Compatibility: Fully Compatible
Sprint: Sharding 2018-07-16
Participants:

 Description   

As part of SERVER-32635, a last-stable binary version mongos will crash upon attempting to connect to a latest featureCompatibilityVersion cluster. However, since this behavior was added for 4.0 mongos and FCV 4.2 was not present at the time, some special testing behavior was necessary to simulate a 4.0 mongos crashing. As part of the 4.2 upgrade/downgrade work, the crash_mongos_against_upgraded_cluster.js test should be updated to no longer rely on these failpoints and just directly use a 4.0 mongos and FCV 4.2 cluster. The failpoints/wireVersion added as part of SERVER-32635 solely for simulation of the crash should also be removed.



 Comments   
Comment by Githook User [ 02/Jul/18 ]

Author:

{'username': 'BlakeIsBlake', 'name': 'Blake Oler', 'email': 'blake.oler@mongodb.com'}

Message: SERVER-35655 Update FCV constants throughout server code.
SERVER-35169 Bump wire protocol version for 4.2.
SERVER-35752 Ensure tests that rely on FCV pass after updating FCV constants.
SERVER-35163 Unblacklist tests that expect FCV version to differ between "last-stable" and "latest."
SERVER-34984 Update major_version_upgrade.js to call setFCV to the latest FCV.
SERVER-35656 Ensure a 4.0 mongos crashes upon attempting to connect to an FCV 4.2 cluster.
SERVER-35404 Re-enable the sharding_last_stable_mongos_and_mixed_shards suite.
Branch: master
https://github.com/mongodb/mongo/commit/53a34c4f01d6b18df4c4800df9a72b1eff07fb6a

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