Sleuth | Sleuth , son of Snoop and brother of Crack

I'm making a sequential request using Feign Builder. There are no x-b3-traceid,x-b3-spanid .. in the title of the request. That's why the log my last client appears on the zipkin.

I use spring boot 2.4.2 , spring cloud 2020.0.0 , feign-core 10.10.1 , feign-okhttp 10.10.1. I have tried spring-cloud-openfeign and i achieved wanted result. But i don't want to use this lib. There are requests when using Feign Builder and Rest Template in here. I dont' see same log at zipkin.

My Client1 App. I am sending request http://localhost:8082/

I am facing issue with spring cloud sleuth as it is leaking memory as I have gone through the dumps of my applications:

What does 13.05mb (40.3%) of Java Static org.springframework.cloud.sleuth.instrument.async.SleuthContextListener.CACHE

Spring Cloud Version: Hoxton.SR8 Spring Boot Version: 2.3.3.RELEASE

Please find the heapdump report below:

https://heaphero.io/my-heap-report.jsp?p=YXJjaGl2ZWQvMjAyMS8wNS8yNS8tLWhlYXBkdW1wLTE2MjE5MjE0MzYyNTMuaHByb2YtNS00Ni0xLmpzb24=

pls find the code repo below, which I am using in my appplication, Also on first run there is no memory leakage issue but on successive runs it shows the memory leakage issue as mentioned in the heapdump report

In my project I'm using Jhipster Spring Boot and I would like to start 2 instances of one microservise at the same time, but on different instances of a database (MongoDB).

In this microservice I have classes, services, rests that are used for collections A, B C,.. for which now I would like to have also history collections A_history, B_history, C_history (that are structured exactly the same like A, B, C) stored in separated instance of a database. It makes no sense to me to create "really separated" microservice since I would have to copy all logic from the first one and end up with doubled code that is very hard to maintain. So, the idea is to have 2 instances of the same microservice, one for A, B, C collections stored in "MicroserviceDB" and second for A_history, B_history, C_history collections stored in "HistoryDB".

I've tried with creating 2 profiles, but when I start from a command line History microservice, it is started ok, but if I also try to start "original" microservice at the same time, it is started but immediately history service becomes "original" microservice. Like they cannot work at the same time.

Is this concept even possible in microservice architecture? Does anyone have an idea how to make this to work, or have some other solution for my problem?

Thanks.

application.yml

We have an existing application which is working fine with the SpringBoot 2.2.2.RELEASE. Now we tried to upgrade it to the SpringBoot 2.4.2 version and application is not getting started and throws the following error. In the classpath I could see only one spring-webmvc-5.3.2.jar file.

Below is the pom.xml for the referance:

I could not find any example which is integrating Spring cloud Sleuth with the Spring Cloud Gateway. Want a Sample Project doing the Integration successfully.

In my Spring Boot WebFlux application, I am using Reactor. I have set spring.sleuth.reactor.instrumentation-type=manual and am using @ContinueSpan on a service method. I see from the code that the span is created, started and ended appropriately in a reactive way.

Later, in the Flux I need to extract the trace information.

The code I am using injects Tracer and I use Tracer.currentSpan().context() to try to get to the trace context. I can successfully get the currentSpan() until I hit a call to an R2DBC repository method, after which the currentSpan is null. I can make the span "current" by annotating the repository method, but I do not want to do that unless it's necessary. I'd like to understand the underlying "problem".

I have also looked at CurrentTraceContext in the Reactor Subscription Context and see that it answers as Tracer does. Supporting both seems to be a threadlocal-ly supported trace context.

Oddly, if I look at TraceContext in the Subscriber context, the trace, parent, and span ids are there. It appears that WebFluxSleuthOperators.currentTraceContext(Context...) does this - so I have to believe that this is the appropriate vehicle for obtaining the trace context.

So, a few questions:

1. Is WebFluxSleuthOperators.currentTraceContext(Context...) [TraceContext in the Reactor Subscription context] the proper way to get the up-to-date trace context?

2. Looking at ReactorSleuthMethodInvocationProcessor, a reference to the current span and trace context are given to the SpanSubscriber which puts them in the Subscriber context. As mentioned earlier, subscribe() and next() are invoked within the context of that span. Why would a method such as a call to a r2dbc repository method effectively "erase" the tracer.currentSpan() but leave the trace context alone?

I'd love to understand this a bit more deeply and will look at the source more. But any insight right now is greatly appreciated. Thank you very much in advance.

Following the spring cloud sleuth documentation, I've configured an app properties with the following:

I can't access to my usersList: if I don't add a user first I can't user neither of the other paths of my controller. here, I can't get my users list unless I add a user first and I am using postgres DB then if I add a user everything else works and it brings me all the users in the database the error that I got

controller

I'd like to profile my Go HTTP server application to see if there are places where it can be optimized. I'm using the fasthttp package with the fasthttp/router package, and I'm struggling to figure out how to hook up pprof.

The basic setup looks like this, obviously very abridged: