[SERVER-30924] Remove fromRouter parsing in 3.8 Created: 01/Sep/17  Updated: 30/Oct/23  Resolved: 13/Dec/17

Status: Closed
Project: Core Server
Component/s: Aggregation Framework
Affects Version/s: None
Fix Version/s: 3.7.1

Type: Task Priority: Major - P3
Reporter: Tess Avitabile (Inactive) Assignee: David Storch
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
related to SERVER-30899 Adapting meaning of 'fromRouter' caus... Closed
Backwards Compatibility: Fully Compatible
Sprint: Query 2017-12-18
Participants:

 Description   

In MongoDB 3.4, mongos specifies that metadata for merging should be appended to an aggregation result using the parameter fromRouter=true. In MongoDB 3.6, this is renamed to needsMerge. However, 3.6 mongod still parses fromRouter in order to understand a request from a 3.4 mongos. In MongoDB 3.8, we can remove parsing of fromRouter.



 Comments   
Comment by Githook User [ 13/Dec/17 ]

Author:

{'name': 'David Storch', 'email': 'david.storch@10gen.com', 'username': 'dstorch'}

Message: SERVER-30924 Remove handling of 'fromRouter' in aggregation subsystem.

This code was necessary only to handle 3.4/3.6 mixed version
clusters.
Branch: master
https://github.com/mongodb/mongo/commit/06c1da7fa0d99fe643674fa7d5b0533b7d364791

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