HDFS-12974. Exception message is not printed when creating an encryption zone fails with AuthorizationException. Contributed by fang zhenyi.

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/authorize/AuthorizationException.java

@@ -64,17 +64,19 @@ public class AuthorizationException extends AccessControlException {
 
   @Override
   public void printStackTrace() {
-    // Do not provide the stack-trace
+    printStackTrace(System.err);
   }
 
   @Override
   public void printStackTrace(PrintStream s) {
     // Do not provide the stack-trace
+    s.println(this);
   }
 
   @Override
   public void printStackTrace(PrintWriter s) {
     // Do not provide the stack-trace
+    s.println(this);
   }
 
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EncryptionFaultInjector.java

@@ -51,4 +51,7 @@ public class EncryptionFaultInjector {
 
   @VisibleForTesting
   public void reencryptUpdaterProcessCheckpoint() throws IOException {}
+
+  @VisibleForTesting
+  public void ensureKeyIsInitialized() throws IOException {}
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirEncryptionZoneOp.java

@@ -121,6 +121,7 @@ final class FSDirEncryptionZoneOp {
       throw new IOException("Must specify a key name when creating an "
           + "encryption zone");
     }
+    EncryptionFaultInjector.getInstance().ensureKeyIsInitialized();
     KeyProvider.Metadata metadata = provider.getMetadata(keyName);
     if (metadata == null) {
       /*

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestEncryptionZones.java

@@ -80,9 +80,11 @@ import org.apache.hadoop.hdfs.web.WebHdfsConstants;
 import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.hdfs.web.WebHdfsTestUtil;
 import org.apache.hadoop.io.EnumSetWritable;
+import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.Credentials;
 import org.apache.hadoop.security.UserGroupInformation;
+import org.apache.hadoop.security.authorize.AuthorizationException;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.util.DataChecksum;
 import org.apache.hadoop.util.ToolRunner;
@@ -149,6 +151,9 @@ public class TestEncryptionZones {
   private File testRootDir;
   protected final String TEST_KEY = "test_key";
   private static final String NS_METRICS = "FSNamesystem";
+  private static final String  AUTHORIZATION_EXCEPTION_MESSAGE =
+      "User [root] is not authorized to perform [READ] on key " +
+          "with ACL name [key2]!!";
 
   protected FileSystemTestWrapper fsWrapper;
   protected FileContextTestWrapper fcWrapper;
@@ -447,7 +452,6 @@ public class TestEncryptionZones {
     dfsAdmin.createEncryptionZone(zone2, myKeyName, NO_TRASH);
     assertNumZones(++numZones);
     assertZonePresent(myKeyName, zone2.toString());
-
     /* Test failure of create encryption zones as a non super user. */
     final UserGroupInformation user = UserGroupInformation.
         createUserForTesting("user", new String[] { "mygroup" });
@@ -1057,6 +1061,31 @@ public class TestEncryptionZones {
     }
   }
 
+  private class AuthorizationExceptionInjector extends EncryptionFaultInjector {
+    @Override
+    public void ensureKeyIsInitialized() throws IOException {
+      throw new AuthorizationException(AUTHORIZATION_EXCEPTION_MESSAGE);
+    }
+  }
+
+  @Test
+  public void testExceptionInformationReturn() {
+    /* Test exception information can be returned when
+    creating transparent encryption zone.*/
+    final Path zone1 = new Path("/zone1");
+    EncryptionFaultInjector.instance = new AuthorizationExceptionInjector();
+    try {
+      dfsAdmin.createEncryptionZone(zone1, TEST_KEY, NO_TRASH);
+      fail("exception information can be returned when creating " +
+          "transparent encryption zone");
+    } catch (IOException e) {
+      assertTrue(e instanceof RemoteException);
+      assertTrue(((RemoteException) e).unwrapRemoteException()
+          instanceof AuthorizationException);
+      assertExceptionContains(AUTHORIZATION_EXCEPTION_MESSAGE, e);
+    }
+  }
+
   private class MyInjector extends EncryptionFaultInjector {
     volatile int generateCount;
     CountDownLatch ready;