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<p style="margin: 10px 0 0 0">Hmm. I couldn't reproduce the hang with HttpResource itself, but here's a ReloadableSpringServiceTest test which I believe reproduces the issue :</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Test <span class="code-keyword" style="color: #000091">public</span> void testHttpResourceNotFound() <span class="code-keyword" style="color: #000091">throws</span> Exception {
<span class="code-comment" style="color: #808080">// 404 resource, host must be available but not the resource
</span> InMemoryCachingHttpClientBuilder clientBuilder = <span class="code-keyword" style="color: #000091">new</span> InMemoryCachingHttpClientBuilder();
HttpClient hc = clientBuilder.buildClient();
HTTPResource notExistsResource = <span class="code-keyword" style="color: #000091">new</span> HTTPResource(hc, <span class="code-quote" style="color: #009100">"http:<span class="code-comment" style="color: #808080">//localhost:8081/not-found"</span>);
</span>
<span class="code-comment" style="color: #808080">// Create reloadable service
</span> ReloadableSpringService<TestServiceableComponent> service =
<span class="code-keyword" style="color: #000091">new</span> ReloadableSpringService<>(TestServiceableComponent.class);
service.setFailFast(<span class="code-keyword" style="color: #000091">false</span>);
service.setReloadCheckDelay(RELOAD_DELAY);
service.setId(<span class="code-quote" style="color: #009100">"testHttpResourceNotFound"</span>);
<span class="code-comment" style="color: #808080">// Set service configuration resource
</span> List<Resource> resources = <span class="code-keyword" style="color: #000091">new</span> ArrayList<Resource>();
resources.add(notExistsResource);
service.setServiceConfigurations(resources);
service.start();
<span class="code-object" style="color: #910091">long</span> count = 700;
ServiceableComponent<TestServiceableComponent> serviceableComponent = service.getServiceableComponent();
<span class="code-keyword" style="color: #000091">while</span> (count > 0 && <span class="code-keyword" style="color: #000091">null</span> == serviceableComponent) {
<span class="code-object" style="color: #910091">Thread</span>.sleep(RELOAD_DELAY);
count--;
serviceableComponent = service.getServiceableComponent();
}
}
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<p style="margin: 10px 0 0 0">Runnning this test with HttpClient logging set to debug will hang, like the IdP, with the following :</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
DEBUG [org.apache.http.impl.conn.PoolingHttpClientConnectionManager:219] - Connection request: [route: {}->http:<span class="code-comment" style="color: #808080">//localhost:8081][total kept alive: 0; route allocated: 2 of 2; total allocated: 2 of 20]</span>
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