Error "Unable to connect MessageBus" occurs sometimes when deploying backward compose file with mqtt bus

[cherrycl]

🐞 Bug Report

Affected Services [REQUIRED]

The issue is located in: Data

Is this a regression?

No

Description and Minimal Reproduction [REQUIRED]

Run scenarios for backward compatibility test on Jenkins. See scenarios on edgex-taf-pipeline #108
Can't reproduce on my local machine so far.

This issue does not happen every time.
Attached backward compose files and logs.
backward-compose.zip
mqtt-bus-core-data.log
mqtt-broker.log

🔥 Exception or Error

Unable to connect MessageBus: %!w(mqtt.OperationErr={Connect network Error : dial tcp 172.20.0.5:1883: connect: connection refused})"

🌍 Your Environment

Deployment Environment:

EdgeX Version [REQUIRED]:

Anything else relevant?

[lenny-goodell]

Can you try setting EDGEX_STARTUP_DURATION: "120" on core data to extend bootstrapping duration? Default is 60s.

[cherrycl]

Added the EDGEX_STARTUP_DURATION: "120" on all core-services and support-services. Still got the issue.