Fixed more FilesSystemRMStateStore issues. Contributed by Vinod Kumar Vavilapalli.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java

@@ -268,6 +268,18 @@ public class YarnConfiguration extends Configuration {
   /** ACL used in case none is found. Allows nothing. */
   public static final String DEFAULT_YARN_APP_ACL = " ";
 
+  /**
+   * Enable/disable intermediate-data encryption at YARN level. For now, this
+   * only is used by the FileSystemRMStateStore to setup right file-system
+   * security attributes.
+   */
+  @Private
+  public static final String YARN_INTERMEDIATE_DATA_ENCRYPTION = YARN_PREFIX
+      + "intermediate-data-encryption.enable";
+
+  @Private
+  public static final Boolean DEFAULT_YARN_INTERMEDIATE_DATA_ENCRYPTION = false;
+
   /** The address of the RM admin interface.*/
   public static final String RM_ADMIN_ADDRESS = 
     RM_PREFIX + "admin.address";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/FileSystemRMStateStore.java

@@ -62,6 +62,7 @@ import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.impl.pb.AM
 import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.impl.pb.ApplicationAttemptStateDataPBImpl;
 import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.impl.pb.ApplicationStateDataPBImpl;
 import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.impl.pb.EpochPBImpl;
+
 import com.google.common.annotations.VisibleForTesting;
 
 @Private
@@ -100,7 +101,8 @@ public class FileSystemRMStateStore extends RMStateStore {
   private Path dtSequenceNumberPath = null;
   private int fsNumRetries;
   private long fsRetryInterval;
-  private volatile boolean isHDFS;
+  private boolean intermediateEncryptionEnabled =
+      YarnConfiguration.DEFAULT_YARN_INTERMEDIATE_DATA_ENCRYPTION;
 
   @VisibleForTesting
   Path fsWorkingPath;
@@ -121,6 +123,9 @@ public class FileSystemRMStateStore extends RMStateStore {
     fsRetryInterval =
         conf.getLong(YarnConfiguration.FS_RM_STATE_STORE_RETRY_INTERVAL_MS,
                 YarnConfiguration.DEFAULT_FS_RM_STATE_STORE_RETRY_INTERVAL_MS);
+    intermediateEncryptionEnabled =
+        conf.getBoolean(YarnConfiguration.YARN_INTERMEDIATE_DATA_ENCRYPTION,
+          YarnConfiguration.DEFAULT_YARN_INTERMEDIATE_DATA_ENCRYPTION);
   }
 
   @Override
@@ -145,17 +150,11 @@ public class FileSystemRMStateStore extends RMStateStore {
     }
 
     fs = fsWorkingPath.getFileSystem(fsConf);
-    isHDFS = fs.getScheme().toLowerCase().contains("hdfs");
     mkdirsWithRetries(rmDTSecretManagerRoot);
     mkdirsWithRetries(rmAppRoot);
     mkdirsWithRetries(amrmTokenSecretManagerRoot);
   }
 
-  @VisibleForTesting
-  void setIsHDFS(boolean isHDFS) {
-    this.isHDFS = isHDFS;
-  }
-
   @Override
   protected synchronized void closeInternal() throws Exception {
     closeWithRetries();
@@ -856,10 +855,11 @@ public class FileSystemRMStateStore extends RMStateStore {
 
   private void setUnreadableBySuperuserXattrib(Path p)
           throws IOException {
-    if (isHDFS &&
-            !fs.getXAttrs(p).containsKey(UNREADABLE_BY_SUPERUSER_XATTRIB)) {
+    if (fs.getScheme().toLowerCase().contains("hdfs")
+        && intermediateEncryptionEnabled
+        && !fs.getXAttrs(p).containsKey(UNREADABLE_BY_SUPERUSER_XATTRIB)) {
       fs.setXAttr(p, UNREADABLE_BY_SUPERUSER_XATTRIB, null,
-              EnumSet.of(XAttrSetFlag.CREATE));
+        EnumSet.of(XAttrSetFlag.CREATE));
     }
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestFSRMStateStore.java

@@ -26,11 +26,6 @@ import java.util.LinkedList;
 import java.util.Queue;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.hdfs.DistributedFileSystem;
-import org.apache.hadoop.security.AccessControlException;
-import org.apache.hadoop.security.UserGroupInformation;
-import org.junit.Assert;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
@@ -38,17 +33,22 @@ import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
+import org.apache.hadoop.security.AccessControlException;
+import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
-import org.apache.hadoop.yarn.server.records.impl.pb.VersionPBImpl;
 import org.apache.hadoop.yarn.server.records.Version;
+import org.apache.hadoop.yarn.server.records.impl.pb.VersionPBImpl;
 import org.apache.hadoop.yarn.server.resourcemanager.recovery.records.ApplicationStateData;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
 import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppState;
 import org.apache.hadoop.yarn.util.ConverterUtils;
+import org.junit.Assert;
 import org.junit.Test;
 
 public class TestFSRMStateStore extends RMStateStoreTestBase {
@@ -111,6 +111,10 @@ public class TestFSRMStateStore extends RMStateStoreTestBase {
       conf.setInt(YarnConfiguration.FS_RM_STATE_STORE_NUM_RETRIES, 8);
       conf.setLong(YarnConfiguration.FS_RM_STATE_STORE_RETRY_INTERVAL_MS,
               900L);
+      if (adminCheckEnable) {
+        conf.setBoolean(
+          YarnConfiguration.YARN_INTERMEDIATE_DATA_ENCRYPTION, true);
+      }
       this.store = new TestFileSystemRMStore(conf);
       Assert.assertEquals(store.getNumRetries(), 8);
       Assert.assertEquals(store.getRetryInterval(), 900L);
@@ -119,11 +123,6 @@ public class TestFSRMStateStore extends RMStateStoreTestBase {
       store.startInternal();
       Assert.assertTrue(store.fs != previousFs);
       Assert.assertTrue(store.fs.getConf() == store.fsConf);
-      if (adminCheckEnable) {
-        store.setIsHDFS(true);
-      } else {
-        store.setIsHDFS(false);
-      }
       return store;
     }