[Enhancement] make log more accurate fot the MQClientInstance#doRebalance

[miles-ton]

Before Creating the Enhancement Request

• I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

the log is inside the loop, we should show which element cause the exception

Motivation

helping to locate the issue accurately

Describe the Solution You'd Like

print the identify of the element

Describe Alternatives You've Considered

none

Additional Context

No response