Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Question or discussion
• Bug
• Requirement
• Feature or performance improvement

Requirement or improvement

It is difficulty to correlate log and tracing.
Finding tracing by traceId often fails because sampling is turned on.
if we record important log (such as error lo

Based on comments like this i suggest a compatiblity matrix in the readme under the section Will Dapper work with my DB provider?.

This way new users can get some heads-up before investing time and effort. Especially Microsoft.Data.Sqlite

developer guide: development note for Middleware Engineering

• why need Middleware Engineering
• how to do it

Middleware Engineering 🔥, like multi-version Java full support(support low version Java and full functions of high version Java), is boring but essential for middleware! 🤣

https://github.com/alibaba/transmittable-thread-local/releases/tag/v2.5.0

I figured out that node-sass dependency mentioned in web package is obsolete now.

I tried to change it to

"devDependencies": {
"@vue/cli-plugin-babel": "^3.0.0-rc.10",
"@vue/cli-plugin-eslint": "^3.0.0-rc.10",
"@vue/cli-service": "^3.0.0-rc.10",
"node-sass": "^4.14.0",
"sass-loader": "^7.0.3",
"vue-template-compiler": "^2.5.16"
},

then web-vue built s

We don't need to provide very detailed development document, but at least, we should have one about How to add a new widget for new metric. Do you agree? From my perspective, in current UI architecture, this would become one very interesting point for new contributor.

I understand that we use 'cls' for context storage/thread local storage. However, it is a little painful for me right now to try to get spans from thread local storage, that is because there are many moving parts: I need to initialize the tracer or get the global tracer (will creating a new tracer work?) and then check the current context but then check if the contextManager has a rootSpan. Also g

I'm not sure if I'm just tired and stupid, but I have gone through all the examples and I cannot seem to find a way to limit the number of results returned...

Is this a limitation at the moment?

Thanks for the good examples.
There's warning when running example/queue:
queue/runner.py:19: DeprecationWarning: Application.make_handler(...) is deprecated, use AppRunner API instead

python 3.7.2
aiozipkin==0.5.0
aiohttp==3.5.4
aiojobs==0.2.2

Checked latest aiohttp doc., maybe need to update like this (it works without warnings):

# /examples/queue/runner.py
def ru