weicheng-07 commented on code in PR #29151:
URL: https://github.com/apache/flink/pull/29151#discussion_r3994801987


##########
flink-metrics/flink-metrics-prometheus/src/main/java/org/apache/flink/metrics/prometheus/PrometheusPushGatewayReporter.java:
##########
@@ -96,4 +100,26 @@ public void close() {
         }
         super.close();
     }
+
+    private static final class JdkBasicAuthHttpConnectionFactory implements 
HttpConnectionFactory {
+        private final HttpConnectionFactory connectionFactory = new 
DefaultHttpConnectionFactory();
+        private final String authorizationHeader;
+
+        private JdkBasicAuthHttpConnectionFactory(String username, String 
password) {
+            // Use the JDK encoder because simpleclient's implementation 
requires JAXB.

Review Comment:
   Confirmed: URL encoding through `PushGateway.base64url` still depends on 
JAXB in simpleclient 0.8.1. This PR remains scoped to Basic Auth header 
encoding; the client upgrade is tracked in 
[FLINK-29623](https://issues.apache.org/jira/browse/FLINK-29623).



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