https://github.com/openzipkin/zipkin/blob/master/zipkin/src/main/java/zipkin2/Span.java#L759

tags = builder.tags == null ? Collections.emptyMap() : new LinkedHashMap<>(builder.tags);

The empty map is immutable and makes it difficult to add a tag to a already created span. This will be helpful with performance. Otherwise, have to turn it in to builder and back to a Span when this type is us

Let's support at least reading "b3" header from a single string, most commonly traceid-spanid-1
It would also be nice to support optionally writing this, especially in message providers or others with constrained environments.

Expected behavior

As discussed on openzipkin/b3-propagation#21 and first implemented here: https://github.com/openzipkin/brave/blob/master/brave/src/main/java/bra

问题描述

前端项目登陆的时候，报错500。

原因分析

是因为feign获取user的时候，超时，然后走的是降级的代码。

本质就是因为feign请求的时候，超时。

在这个项目里，feign请求超时。

而且，自己写的简单demo （ https://gitee.com/52itstyle/Spring-Cloud-Alibaba.git )， 专门用于测试nacos和feign，也是超时。一模一样的错误。

所以，应该不是这个项目的原因，而是我的电脑(mac)，只要是nacos和feign，都是超时。

2020-02-24 20:58:21.938 ERROR [authorization-server,b6ed6d23d9efe8e5,b6ed6d23d9efe8e5,true] 20465 --- [nio-8000-exec-1] 

Is your feature request related to a problem? Please describe.
I got few migrations each referring a different connection. migrate:fresh, migrate:refresh doesn't handle this scenario since they operate on the default connection or in the specific connection passed via --database param.

Describe the solution you'd like
The simplest solution can be to process only migrations that has th

There was a huge performance problem when using sleuth in the reactive stack. See here

This was partially addressed by this

But the downside 1478 of contents of MDC would be lost anytime event

What version of OpenCensus are you using?

HEAD of this repo

What version of Go are you using?

go version go1.13.4 darwin/amd64

Details

examples.PrintExporter seems to require being passed to view.RegisterExporter, but examples.LogExporter can't be passed there because it doesn't implement the write Exporter type. Instead, you're expected to run the Start metho

makes no sense. javadoc doesn't fail locally and these are all public types. Something's up https://circleci.com/gh/spring-cloud/spring-cloud-sleuth/6054

I will disable javadoc enforcement for now.

[WARNING] Javadoc Warnings
[WARNING] /root/project/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/instrument/web/HttpClientRequestParser.java:44: warning - Tag @link

Hi there! I wanted to propose adding the following badge to the README to indicate how many TODO comments are in this codebase:

The badge links to tickgit.com which is a free service that indexes and displays TODO comments in public gith

Currently websockets are unsupported:

class SttpBackendStub[F[_], S] private (
    monad: MonadError[F],
    matchers: PartialFunction[Request[_, _], F[Response[_]]],
    fallback: Option[SttpBackend[F, S, NothingT]]
) extends SttpBackend[F, S, NothingT] { // TODO

(note the TODO for the NothingT type parameter which specifies what kind of websockets are supported).

The bac

How adjust the value of these options in different production envirement?

• molten.sampling_request
• molten.sampling_rate
• molten.report_interval
• molten.report_limit

How can we use the notify function ? What does it do ?
molten.notify_uri

I followed the steps:
$ kubectl apply -f kubernetes/client-side-lb-api/echo-server.yaml
$ kubectl apply -f kubernetes/client-side-lb-api/echo-client.yaml
$ kubectl get pods -l run=echo-client
with this step:
$ kubectl logs -f echo-client...
I found java error

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SL

Currently, responses with status code <200 are being marked as errors.

https://github.com/openzipkin/zipkin-js/blob/master/packages/zipkin/src/instrumentation/httpServer.js#L91
https://github.com/openzipkin/zipkin-js/blob/master/packages/zipkin/src/instrumentation/httpClient.js#L43

Comes from openzipkin/brave#874

Ping @adriancole @ghermeto

Often it is useful to add remoteEndpoint to the client spans. Specifically http requests.

Currently nor the client or the transport support this functionality. The most logical options that comes to my mind is that we add an option for both.

Ping @basvanbeek @adriancole

Hinting from the below comment and an encoding bug I think flags needs to be revisited:

        public const string Sampled = "X-B3-Sampled"; // Will be replaced by Flags in the future releases of Finagle

The X-B3-Flags header back maybe 2012 or so was thinking about becoming more, but never did. Reasons including awkward overlap with sampled, and also it is mainly covering binar