Micrometer - Add missing metrics for cases of client errors

[adpaste]

Changes ported from micrometer-metrics/micrometer#4326

[senivam]

Thank you for the PR. Will the #5531 be fixed either?

[adpaste]

No problem! #5531 is a different issue.

[senivam]

No problem! #5531 is a different issue.

yes, I'm just reminding in order not to forget about it :)

[andersflemmen]

Any chance for this fix to be ported to the 3.x version as well? We are actually seeing NullPointerExceptions caused by matchingPattern being null when making a request to a non-existing URL.

[senivam]

@andersflemmen it should already be there, all fixes in the 2.x are later uptaken by 3.0, 3.1 etc.

[andersflemmen]

Sorry, the error actually occurs in the JerseyKeyValues class. Seems like that one had a similar fix in the micrometer repo:
micrometer-metrics/micrometer@66c1d47

Caused by: java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because "matchingPattern" is null
        at org.glassfish.jersey.micrometer.server.JerseyKeyValues.uri(JerseyKeyValues.java:96)
        at org.glassfish.jersey.micrometer.server.DefaultJerseyObservationConvention.getLowCardinalityKeyValues(DefaultJerseyObservationConvention.java:43)
        at org.glassfish.jersey.micrometer.server.DefaultJerseyObservationConvention.getLowCardinalityKeyValues(DefaultJerseyObservationConvention.java:30)
        at io.micrometer.observation.SimpleObservation.start(SimpleObservation.java:152)
        at io.micrometer.observation.docs.ObservationDocumentation.start(ObservationDocumentation.java:241)
        at org.glassfish.jersey.micrometer.server.ObservationRequestEventListener.startObservation(ObservationRequestEventListener.java:99)
        at org.glassfish.jersey.micrometer.server.ObservationRequestEventListener.onEvent(ObservationRequestEventListener.java:71)
        at org.glassfish.jersey.server.internal.monitoring.CompositeRequestEventListener.onEvent(CompositeRequestEventListener.java:47)
        at org.glassfish.jersey.server.internal.process.RequestProcessingContext.triggerEvent(RequestProcessingContext.java:203)
        at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:442)
        at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:282)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:266)
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:253)
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:696)
        at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
        ... 128 common frames omitted

[jansupol]

@andersflemmen I have it backported in #5690