[RATIS-1749] GroupMismatchException thrown when setConfiguration

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 2.4.0
• Component/s: client, raft-group
• Assignee: Unassigned
• Reporter: Song Ziyang
• Created: 17/Nov/22 14:59
• Updated: 10/Aug/23 04:35
• Resolved: 10/Aug/23 04:35

Description

GroupMismatchException occurs when I'm trying to start and add a new server to the group.

Reproduce steps:

1. call CompletableFuture.supplyAsync(admin().setConfiguration(newGroup))
2. call groupManagementApi(newServer).add(group)

GroupMismatchException happens time to time, as in the attched log.

I think the setConfiguration here may route the request to the NEW server to be added, since it does not explicitly assign a serverId in request. setConfiguration arrives before addNewGroup, so GroupMismatchException happens.

[1]https://github.com/apache/ratis/blob/f2447cfe0b94ad5f9e72dff1623fa90b6f42f4f5/ratis-client/src/main/java/org/apache/ratis/client/api/AdminApi.java#L39