Timeout in updating v3/profile/<mxid>/displayname on large account

[neilisfragile]

Description

I am trying to update my display name, my client (Element Web in this case) reports an error following the HTTP request timing out. However the display name update goes through as intended.

Steps to reproduce

Make a PUT request to v3/profile//displayname of a large account (600-700 rooms) - wait for a timeout.

Homeserver

matrix.org

Synapse Version

"Synapse","version":"1.103.0 (b=matrix-org-hotfixes,7d5f3ea750,dirty)"

Installation Method

Docker (matrixdotorg/synapse)

Database

matrix.org

Workers

Multiple workers

Platform

matrix.org

Configuration

matrix.org

Relevant log output

matrix.org

Anything else that would be useful to know?

I cannot reproduce this on a small account. My account has about 600-700 rooms, and I assume the timeout is caused by updating the state in each room.

I don't believe this to be a new bug.

[dklimpel]

Related to:

• Changing displayname is catastrophically slow. (SYN-311) #1297

[richvdh]

Duplicate of #1297