HDFS-8711. setSpaceQuota command should print the available storage type when input storage type is wrong. Contributed by Brahma Reddy Battula.

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -701,6 +701,9 @@ Release 2.8.0 - UNRELEASED
 
     HDFS-8709. Clarify automatic sync in FSEditLog#logEdit. (wang)
 
+    HDFS-8711. setSpaceQuota command should print the available storage type
+    when input storage type is wrong. (Brahma Reddy Battula via xyao)
+
   OPTIMIZATIONS
 
     HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java

@@ -290,9 +290,15 @@ private static class SetSpaceQuotaCommand extends DFSAdminCommand {
       String storageTypeString =
           StringUtils.popOptionWithArgument("-storageType", parameters);
       if (storageTypeString != null) {
+        try {
           this.type = StorageType.parseStorageType(storageTypeString);
+        } catch (IllegalArgumentException e) {
+          throw new IllegalArgumentException("Storage type "
+              + storageTypeString
+              + " is not available. Available storage types are "
+              + StorageType.getTypesSupportingQuota());
+        }
       }
-      
       this.args = parameters.toArray(new String[parameters.size()]);
     }
     

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

@@ -17,18 +17,22 @@
  */
 package org.apache.hadoop.hdfs;
 
+import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import java.io.ByteArrayOutputStream;
 import java.io.OutputStream;
+import java.io.PrintStream;
 import java.security.PrivilegedExceptionAction;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.ContentSummary;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.StorageType;
 import org.apache.hadoop.hdfs.protocol.DSQuotaExceededException;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants;
 import org.apache.hadoop.hdfs.protocol.NSQuotaExceededException;
@@ -41,6 +45,8 @@
 import org.junit.Assert;
 import org.junit.Test;
 
+import com.google.common.base.Charsets;
+
 /** A class for testing quota-related commands */
 public class TestQuota {
   
@@ -986,4 +992,19 @@ public void testMultipleFilesSmallerThanOneBlock() throws Exception {
       cluster.shutdown();
     }
   }
+
+  @Test
+  public void testSetSpaceQuotaWhenStorageTypeIsWrong() throws Exception {
+    Configuration conf = new HdfsConfiguration();
+    conf.set(FS_DEFAULT_NAME_KEY, "hdfs://127.0.0.1:8020");
+    DFSAdmin admin = new DFSAdmin(conf);
+    ByteArrayOutputStream err = new ByteArrayOutputStream();
+    System.setErr(new PrintStream(err));
+    String[] args = { "-setSpaceQuota", "100", "-storageType", "COLD",
+        "/testDir" };
+    admin.run(args);
+    String errOutput = new String(err.toByteArray(), Charsets.UTF_8);
+    assertTrue(errOutput.contains(StorageType.getTypesSupportingQuota()
+        .toString()));
+  }
 }