matrix.org/static/jira/browse/SYN-482

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summary: /rooms/{roomId}/initialSync API does not return the same messages as rooms/{roomId}/messages over federation
---
created: 2015-09-21 13:55:57.0
creator: gforet
description: |-
After joining an IRC one to one channel, the initial sync request triggers by "api/v1/rooms/[roomId]/initialSync" with a limit =10 provides only one event as "messages" whereas there are more than 3 messages in the chat.
For information:
1- "history_visibility" = invited;
2- the messages show up if we hit the /messages API
To reproduce:
1- From IRC chat, userA select a userB to open a dialog window (no one to one channel must exist for these 2 users).
2 - In irc window userA sends 3 messages.
3- on a Matrix client, userB selects the invitation from recents
--> userB join the room and trigger an initialSync for this room
Presently the room history is not provided during the room initial sync: NOK
id: '11905'
key: SYN-482
number: '482'
priority: '2'
project: '10000'
reporter: gforet
resolution: '2'
resolutiondate: 2016-03-09 11:45:26.0
status: '5'
type: '1'
updated: 2016-03-09 11:45:26.0
votes: '0'
watches: '2'
workflowId: '12008'
---
actions:
- author: markjh
body: Reproduced by https://github.com/matrix-org/sytest/commit/2032961e5fc
created: 2015-09-22 11:23:20.0
id: '12148'
issue: '11905'
type: comment
updateauthor: markjh
updated: 2015-09-22 11:23:20.0
- author: markjh
body: If I recall correctly I had a go at fixingthis by making room initialSync do backfill, but then [~erikj] talked me out of it because it might cause problems if the server started backfilling without a client explicitly asking for it by hitting /messages.
created: 2016-01-06 13:58:21.0
id: '12544'
issue: '11905'
type: comment
updateauthor: markjh
updated: 2016-01-06 13:58:21.0
- author: markjh
body: After discussing this with [~erikj] we decided to not make initialSync hit backfill messages, therefore it is expected that initialSync and messages will return different things
created: 2016-03-09 11:45:26.0
id: '12757'
issue: '11905'
type: comment
updateauthor: markjh
updated: 2016-03-09 11:45:26.0