HADOOP-2156 BufferUnderflowException for un-named HTableDescriptors

git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk/src/contrib/hbase@592551 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -27,6 +27,7 @@ Trunk (unreleased changes)
                the test more deterministic and getting META reassigned was
                problematic.
    HADOOP-2155 Method expecting HBaseConfiguration throws NPE when given Configuration
+   HADOOP-2156 BufferUnderflowException for un-named HTableDescriptors
 
   IMPROVEMENTS
     HADOOP-2401 Add convenience put method that takes writable

src/java/org/apache/hadoop/hbase/HBaseAdmin.java

@@ -112,7 +112,6 @@ public class HBaseAdmin implements HConstants {
    */
   public void createTable(HTableDescriptor desc)
   throws IOException {
-    
     createTableAsync(desc);
 
     // Wait for new table to come on-line
@@ -134,15 +133,12 @@ public class HBaseAdmin implements HConstants {
    */
   public void createTableAsync(HTableDescriptor desc)
   throws IOException {
-    
     if (this.master == null) {
       throw new MasterNotRunningException("master has been shut down");
     }
-    
     checkReservedTableName(desc.getName());
     try {
       this.master.createTable(desc);
-
     } catch (RemoteException e) {
       throw RemoteExceptionHandler.decodeRemoteException(e);
     }
@@ -492,10 +488,12 @@ public class HBaseAdmin implements HConstants {
    * @throws IllegalArgumentException - if the table name is reserved
    */
   protected void checkReservedTableName(Text tableName) {
+    if (tableName == null || tableName.getLength() <= 0) {
+      throw new IllegalArgumentException("Null or empty table name");
+    }
     if(tableName.charAt(0) == '-' ||
         tableName.charAt(0) == '.' ||
         tableName.find(",") != -1) {
-      
       throw new IllegalArgumentException(tableName + " is a reserved table name");
     }
   }

src/java/org/apache/hadoop/hbase/HTableDescriptor.java

@@ -74,7 +74,11 @@ public class HTableDescriptor implements WritableComparable {
     families.put(family.getName(), family);
   }
 
-  /** Constructs an empty object */
+  /**
+   * Constructs an empty object.
+   * For deserializing an HTableDescriptor instance only.
+   * @see #HTableDescriptor(String)
+   */
   public HTableDescriptor() {
     this.name = new Text();
     this.families = new TreeMap<Text, HColumnDescriptor>();

src/test/org/apache/hadoop/hbase/TestMasterAdmin.java

@@ -41,6 +41,15 @@ public class TestMasterAdmin extends HBaseClusterTestCase {
   /** @throws Exception */
   public void testMasterAdmin() throws Exception {
     admin = new HBaseAdmin(conf);
+    // Add test that exception is thrown if descriptor is without a table name.
+    // HADOOP-2156.
+    boolean exception = false;
+    try {
+      admin.createTable(new HTableDescriptor());
+    } catch (IllegalArgumentException e) {
+      exception = true;
+    }
+    assertTrue(exception);
     admin.createTable(testDesc);
     admin.disableTable(testDesc.getName());