HADOOP-15686. Supress bogus AbstractWadlGeneratorGrammarGenerator in KMS stderr. Contributed by Wei-Chiu Chuang.

Reviewed-by: Xiaoyu Yao <xyao@apache.org>

hadoop-common-project/hadoop-kms/src/main/java/org/apache/hadoop/crypto/key/kms/server/KMSWebApp.java

@@ -37,6 +37,7 @@ import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.VersionInfo;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.slf4j.bridge.SLF4JBridgeHandler;
 
 @InterfaceAudience.Private
 public class KMSWebApp implements ServletContextListener {
@@ -80,6 +81,11 @@ public class KMSWebApp implements ServletContextListener {
   private static KMSAudit kmsAudit;
   private static KeyProviderCryptoExtension keyProviderCryptoExtension;
 
+  static {
+    SLF4JBridgeHandler.removeHandlersForRootLogger();
+    SLF4JBridgeHandler.install();
+  }
+
   @Override
   public void contextInitialized(ServletContextEvent sce) {
     try {

hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/TestKMS.java

@@ -614,7 +614,18 @@ public class TestKMS {
 
   @Test
   public void testStartStopHttpPseudo() throws Exception {
-    testStartStop(false, false);
+    // Make sure bogus errors don't get emitted.
+    GenericTestUtils.LogCapturer logs =
+        GenericTestUtils.LogCapturer.captureLogs(LoggerFactory.getLogger(
+            "com.sun.jersey.server.wadl.generators.AbstractWadlGeneratorGrammarGenerator"));
+    try {
+      testStartStop(false, false);
+    } finally {
+      logs.stopCapturing();
+    }
+    assertFalse(logs.getOutput().contains(
+        "Couldn't find grammar element for class"));
+
   }
 
   @Test

hadoop-common-project/hadoop-kms/src/test/resources/log4j.properties

@@ -26,6 +26,7 @@ log4j.rootLogger=INFO, stdout
 log4j.logger.org.apache.hadoop.conf=ERROR
 log4j.logger.org.apache.hadoop.crytpo.key.kms.server=ALL
 log4j.logger.com.sun.jersey.server.wadl.generators.WadlGeneratorJAXBGrammarGenerator=OFF
+log4j.logger.com.sun.jersey.server.wadl.generators.AbstractWadlGeneratorGrammarGenerator=OFF
 log4j.logger.org.apache.hadoop.security=OFF
 log4j.logger.org.apache.directory.server.core=OFF
 log4j.logger.org.apache.hadoop.util.NativeCodeLoader=OFF