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HttpHandlerDiagnosticListener did not send DiagnosticSource Stop event on netfx in W3C mode#40777
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lmolkova merged 1 commit intodotnet:masterfrom Sep 4, 2019
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HttpHandlerDiagnosticListener did not send DiagnosticSource Stop event on netfx in W3C mode#40777lmolkova merged 1 commit intodotnet:masterfrom
lmolkova merged 1 commit intodotnet:masterfrom
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…erDiagnosticListener on netfx
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You should run Outerloop tests before final merge especially since the tests affected are Outerloop. And each new commit to a PR does not kick off a new Outerloop run. So, you need to kick off Outerloop manually each time with "/azp run" |
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/azp run |
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Azure Pipelines successfully started running 4 pipeline(s). |
davidsh
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…erDiagnosticListener on netfx (dotnet/corefx#40777) Commit migrated from dotnet/corefx@687a840
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…erDiagnosticListener on netfx (dotnet/corefx#40777) Commit migrated from dotnet/corefx@687a840
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HttpHandlerDiagnosticListener monkey-patches WebRequest to enable tracing with DiagnosticSource.
HttpHandlerDiagnosticListener uses presence of tracing headers to determine if a request was initially instrumented (
Activity.Currentwhich isAsyncLocaldoes not survive in WebRequest callbacks). Based on header presence, when response tarts, it notifies a listener with 'Stop' callback.In #35882 it started to support W3C trace-context and now
Stopevent is not sent if a new W3Ctraceparentis present, but oldRequest-Idis not.This issue only reproduces when tracing is on and W3C mode for Activity is on. By default tracing is off and no events are sent. When tracing is on, default Activity format is the old one, that works with Request-Id header, so problem does not repro.
Tracing tools that enable W3C, can workaround it with adding Request-Id header themselves.