apache httpclient 5 - http calls done in interceptors not instrumented

[kroonprins]

Tracer Version(s)

1.57.0

Java Version(s)

25

JVM Vendor

Eclipse Adoptium / Temurin

Bug Report

When using apache httpclient v5, it is possible to do http requests from with exec interceptors (type org.apache.hc.client5.http.classic.ExecChainHandler) added on a http client. This is e.g. useful for fetching a token to add it as a header on a requests. The requests done in such an interceptor are not instrumented because of this if. Would it be possible to fix this, so that traces do not miss http calls?

Expected Behavior

All http calls are recorded in the trace, even when they are executed from within an interceptor.

Reproduction Code

        try(CloseableHttpClient httpClient = HttpClientBuilder.create()
                .addExecInterceptorLast("interceptor", (request, scope, chain) -> {
                    CloseableHttpClient tokenHttpClient = HttpClientBuilder.create().build();
                    String token = tokenHttpClient.execute(new HttpGet("..."), resp -> {
                        // ...
                        return fetchedToken;
                    });
                    request.addHeader("x-token", token);
                    return chain.proceed(request, scope);
                })
                .build()) {
            httpClient.execute(new HttpGet("..."), response -> {
                // ...
                return null;
            });
        }