Objects do not propagate across parfor, need save/load methods
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评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 38/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 停滞
调研方向
Start with opentelemetry.trace.Tracer/startSpan, especially the reported failure at line 125, and review how the global singleton proxymanager handles proxies across parfor workers. Investigate the custom save/load methods requested for objects and their C++ counterparts. Done means the tracer and related objects propagate through the shown parfor example without the Unknown proxy ID 3 error.
由索引模型根据 Issue 内容生成。
描述
The following code would fail:
tr = opentelemetry.trace.getTracer("parfor_example");
sp = startSpan(tr, "main function");
...
parfor i = 1:8
% start a span for this iteration, using the tracer “tr” from main function
sp_i = startSpan(tr, "Iteration" + i);
...
end
Since tr is used both in and outside of the parfor block, parfor would copy and send it to the workers. Running this code would result in this error:
Error using . (line 63)
Unknown proxy ID 3
Error in opentelemetry.trace.Tracer/startSpan (line 125)
id = obj.Proxy.startSpan(spname, contextid, spankind, starttime, ...
This is because the global singleton proxymanager is not copied. In the workers, the proxies only exist in MATLAB but not in C++.
To make objects correctly propagate through to parfor blocks, they need to implement custom save/load methods which should also save/load their C++ counterparts.
- 主要语言
- MATLAB
- 星标
- 19
- 派生
- 4
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- 30 天内没有已合并 PR
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mathworks/OpenTelemetry-MATLAB 的其他 Issue
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documentation
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documentation
mathworks/OpenTelemetry-MATLAB#248 · 已指派 1 人 ·
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test
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otel-cpp changes
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enhancement
mathworks/OpenTelemetry-MATLAB#242 · 1 条评论 · 已指派 1 人 ·
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flatironinstitute/numbl#65 ·