[FIXED] Metrics http_server_requests_seconds_count in spring boot application using cxf-spring-boot-starter-jaxrs contains uri as "UNKNOWN"

Issue

Metrics http_server_requests_seconds_count in Spring Boot application with version 2.0.8.Release exposed using spring actuator contains URI as:

"UNKNOWN".

Spring Boot application is using cxf-spring-boot-starter-jaxrs for exposing rest endpoints. I have added micrometer-registry-prometheus dependency in my project.

http_server_requests_seconds_count{exception="None",method="POST",status="200",uri="UNKNOWN",} 2.0

I have tried adding micrometer-jersey2 dependency in my project.

Actual

http_server_requests_seconds_count{exception="None",method="POST",status="200",uri="UNKNOWN",} 2.0

Expected:

http_server_requests_seconds_count{exception="None",method="GET",status="200",uri="/sayHello",} 2.0

Solution

After the clarification in OP comments (CXF being another JAX-RS implementation): There's currently no support in Micrometer to handle CXF requests. It (Spring WebMvc) can't extract the optionally parameterized request url and in that case falls back to UNKNOWN. (Otherwise this could lead to a metrics explosion if your CXF endpoints provide some highly parameterizable URLs which get a lot of traffic.)

So you could have a look at the micrometer-jersey2 implementation and derive a micrometer-cxf implementation ;) (Or if not already the case (use the search) - open up an issue with the Micrometer or CXF project. I am mentioning the latter, because they might be interessted in taking care of that implementation.)

Answered By - mweirauch