ES APM traces for HTTP requests include authn duration#96205
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albertzaharovits merged 5 commits intoelastic:mainfrom May 18, 2023
Merged
ES APM traces for HTTP requests include authn duration#96205albertzaharovits merged 5 commits intoelastic:mainfrom
albertzaharovits merged 5 commits intoelastic:mainfrom
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DaveCTurner
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In elastic#96205 we started recording the start time of the authn phase of REST request processing, because this happens too early to even start a span for the request. However we capture the threadpool's cached time which can be 200ms slow, yielding spans that appear much longer than they should. This commit moves to capturing the time using `System.currentTimeMillis` to avoid this problem.
DaveCTurner
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In #96205 we started recording the start time of the authn phase of REST request processing, because this happens too early to even start a span for the request. However we capture the threadpool's cached time which can be 200ms slow, yielding spans that appear much longer than they should. This commit moves to capturing the time using `System.currentTimeMillis` to avoid this problem.
DaveCTurner
added a commit
that referenced
this pull request
Aug 2, 2023
In #96205 we started recording the start time of the authn phase of REST request processing, because this happens too early to even start a span for the request. However we capture the threadpool's cached time which can be 200ms slow, yielding spans that appear much longer than they should. This commit moves to capturing the time using `System.currentTimeMillis` to avoid this problem. Backport of #98113 to 8.9
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Following the changes in #95112, which relocated the calls into the
AuthenticationServicethat authenticate HTTP requests, the authentication duration was no longer comprised in between theTracer#startTraceandTracer#stopTrace. Consequently, the span records didn't cover the authentication duration any longer.This PR remedies that by changing the
Tracerimplementation, i.e.APMTracer, to look for the trace start time instant in the transient thread context and use that when starting traces (overriding thenowdefault). The trace start time is set in the thread context when the request-wise thread context is first populated (with HTTP request headers).