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Type: Improvement
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 4.1.7
Affects Version/s: None
Component/s: Aggregation Framework, Sharding
Labels:
None

Backwards Compatibility:
Fully Compatible
Sprint:
Query 2018-12-03, Query 2018-12-17, Query 2018-12-31

We banned aggregations within transactions on mongos as part of ~~SERVER-33660~~, because doing so could potentially cause a deadlock. We should investigate how to perform a $mergeCursors against the same shard without inducing a deadlock. One idea is to avoid going over the network for a local cursor.

depends on

SERVER-37665 Add interface to check in and check out sessions

Closed

is depended on by

SERVER-37619 Make $out writes retryable

Backlog

is duplicated by

SERVER-34015 Remove uasserts in cluster_aggregate that avoid running snapshot aggregate merge on mongod

Closed

is related to

SERVER-33660 Once getMores include lsid, sharded aggregations with $mergeCursors can hang

Closed

SERVER-33029 Support snapshot in cluster aggregate command

Closed

SERVER-33541 Add snapshot read support for aggregation

Closed

related to

SERVER-37499 Potential deadlock when using exchange within a session

Closed

SERVER-64407 Add ResourceYielder support to ARS

Closed

(1 is related to, 2 related to)

Assignee:: Ian Boros

Reporter:: Charlie Swanson

Participants:: Charlie Swanson, David Storch, Githook User, Ian Boros, Jack Mulrow, Kaloian Manassiev, Misha Tyulenev

Votes:: 0 Vote for this issue

Watchers:: 13 Start watching this issue

Created:: Mar 05 2018 10:08:18 PM UTC

Updated:: Oct 29 2023 10:34:06 PM UTC

Resolved:: Dec 17 2018 10:39:22 PM UTC

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