Metric grpc_server_processing_duration_seconds_max is always 0

[rick-alp]

The context

What do you wish to achieve?

The bug

grpc_server_processing_duration_seconds_max is always 0 no matter what the call with version 3.0.0.RELEASE, grpc_server_processing_duration_seconds_sum and grpc_server_processing_duration_seconds_count are okay.

Steps to Reproduce

Enable metrics, make a grpc call grpc_server_processing_duration_seconds_max should not be 0

Which versions do you use?

• Spring (boot): 3.2.3
• grpc-spring-boot-starter: 3.0.0.RELEASE
• java: version + architecture (64bit?) 21, 64bit

Additional context

• Did it ever work before? Yes, 2.14.0.RELEASE

[ST-DDT]

The metrics is from micrometer, please report this issue upstream:

https://github.com/micrometer-metrics/micrometer/blob/8e877cf4bd9657a0764b8a21f7a7b03583dcd99a/micrometer-core/src/main/java/io/micrometer/core/instrument/binder/grpc/MetricCollectingServerInterceptor.java#L63

[ST-DDT]

Ref:

• https://github.com/micrometer-metrics/micrometer/issues/5062