[GitHub] [hadoop] bensonlin321 commented on a diff in pull request #3959: YARN-11072. Can not display hadoop-st.png when using reverse proxy and applying APPLICATION_WEB_PROXY_BASE

[GitBox <gi...@apache.org>]

bensonlin321 commented on code in PR #3959:
URL: https://github.com/apache/hadoop/pull/3959#discussion_r906652716


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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/webapp/view/TestHeaderBlock.java:
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@@ -0,0 +1,88 @@
+/**
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.hadoop.yarn.webapp.view;
+
+import com.google.inject.Injector;
+
+import java.io.PrintWriter;
+import java.lang.reflect.Field;
+import java.util.Collections;
+import java.util.Map;
+
+import org.apache.hadoop.yarn.webapp.test.WebAppTests;
+
+import org.junit.Test;
+import static org.mockito.Mockito.*;
+
+public class TestHeaderBlock {
+  @SuppressWarnings("unchecked")
+  public void setEnv(Map<String, String> newenv) throws Exception {
+    try {
+      Class<?> processEnvironmentClass = Class.forName("java.lang.ProcessEnvironment");
+      String fieldname = "theEnvironment";
+      Field theEnvironmentField = processEnvironmentClass.getDeclaredField(fieldname);
+      // reset environment accessibility

Review Comment:
   No problem. Thank you for letting me know!



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