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Shutting down a MeterProvider with a asynchronous instrument can take a long time

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
45/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
停滞
技术栈
matlab

调研方向

Start by running the supplied MATLAB loop and compare shutdown timing for the observable gauge and synchronous counter. Inspect the MeterProvider creation and opentelemetry.sdk.common.Cleanup.shutdown path, then review the asynchronous example in test/texamples.m. Done means asynchronous shutdown no longer intermittently takes about 30 seconds and the example test no longer needs filtering.

由索引模型根据 Issue 内容生成。

描述

Run the following code in a loop. Many iterations take only about 0.01 seconds to run but some can take a long time (~30 seconds).

function out = currentsecond()
% callback function for an observable gauge

dt = datetime("now");
s = second(dt);

out = opentelemetry.metrics.ObservableResult;
out = out.observe(s);
for i=1:10, 
   mp = opentelemetry.sdk.metrics.MeterProvider();  
   opentelemetry.metrics.Provider.setMeterProvider(mp);
   clear
   mp = opentelemetry.metrics.Provider.getMeterProvider();   
   m = getMeter(mp, "foo"); 
   g = createObservableGauge(m, @currentsecond, "bar");
   tic;   
   opentelemetry.sdk.common.Cleanup.shutdown(mp);   
   toc; 
end

In comparison, if the code is changed to create a synchronous instrument (e.g. counter) instead of an asynchronous one, then shutdown never takes a long time, always around 0.01 seconds.

This issue causes an asynchronous example test in test/texamples.m to be filtered out due to the time it takes to run the test.

主要语言
MATLAB
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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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