Harden Key Vault JCA proxy PR

Author: Vladimir Rusnak

sdk/keyvault/azure-security-keyvault-jca/CHANGELOG.md

@@ -8,6 +8,9 @@
 
 ### Bugs Fixed
 
+- Fixed an issue where the internal HTTP client did not honor JVM proxy system properties.
+  ([#28801](https://github.com/Azure/azure-sdk-for-java/issues/28801))
+
 ### Other Changes
 
 ## 2.11.0 (2026-02-28)

sdk/keyvault/azure-security-keyvault-jca/src/test/java/com/azure/security/keyvault/jca/implementation/utils/HttpUtilTest.java

@@ -5,6 +5,8 @@
 
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.parallel.ResourceLock;
+import org.junit.jupiter.api.parallel.Resources;
 
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
@@ -29,6 +31,7 @@ public void getUserAgentPrefixTest() {
     }
 
     @Test
+    @ResourceLock(Resources.SYSTEM_PROPERTIES)
     public void getUsesJvmProxySystemProperties() throws Exception {
         String previousProxyHost = System.getProperty("http.proxyHost");
         String previousProxyPort = System.getProperty("http.proxyPort");