Message ordering seems to have been broken between 1.125.13 and 1.126.0

[burkedavison]

Customer has raised in ticket in Spring Cloud GCP with a replicator project using the emulator demonstrating an issue with message ordering:

• Working version using Spring Cloud GCP 5.0.0 bundled with java-pubsub 1.125.13
• Broken version using Spring Cloud GCP 5.0.1 bundled with java-pubsub 1.126.0
• Working version using Spring Cloud GCP 5.0.1 with hardcoded java-pubsub 1.125.13

The problem is present in 5.0.1 [bundled with java-pubsub 1.126.0], 5.0.2 [bundled with java-pubsub 1.126.2], 5.0.3 [bundled with java-pubsub 1.126.5], and 5.0.4 [bundled with java-pubsub 1.126.6].

Original issue: GoogleCloudPlatform/spring-cloud-gcp#2649

• Contains replicator project: https://github.com/ls-urs-keller/pubsub-message-ordering-problem

[michaelpri10]

@burkedavison
This was an issue that required an update in the Pub/Sub emulator that was fixed in version 0.8.12 of the Pub/Sub emulator. Could you ask the customer to upgrade their version of the emulator?

[michaelpri10]

Per this comment, the user confirmed that upgrading the emulator version fixed the message ordering issue.