HADOOP-11693. Azure Storage FileSystem rename operations are throttled too aggressively to complete HBase WAL archiving. Contributed by Duo Xu.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -1088,6 +1088,9 @@ Release 2.7.0 - UNRELEASED
     HADOOP-11618. DelegateToFileSystem erroneously uses default FS's port in
     constructor. (Brahma Reddy Battula via gera)
 
+    HADOOP-11693. Azure Storage FileSystem rename operations are throttled too
+    aggressively to complete HBase WAL archiving. (Duo Xu via cnauroth)
+
 Release 2.6.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/AzureNativeFileSystemStore.java

@@ -134,6 +134,15 @@ public class AzureNativeFileSystemStore implements NativeFileSystemStore {
   private static final String KEY_MAX_BACKOFF_INTERVAL = "fs.azure.io.retry.max.backoff.interval";
   private static final String KEY_BACKOFF_INTERVAL = "fs.azure.io.retry.backoff.interval";
   private static final String KEY_MAX_IO_RETRIES = "fs.azure.io.retry.max.retries";
+  
+  private static final String KEY_COPYBLOB_MIN_BACKOFF_INTERVAL = 
+    "fs.azure.io.copyblob.retry.min.backoff.interval";
+  private static final String KEY_COPYBLOB_MAX_BACKOFF_INTERVAL = 
+    "fs.azure.io.copyblob.retry.max.backoff.interval";
+  private static final String KEY_COPYBLOB_BACKOFF_INTERVAL = 
+    "fs.azure.io.copyblob.retry.backoff.interval";
+  private static final String KEY_COPYBLOB_MAX_IO_RETRIES = 
+    "fs.azure.io.copyblob.retry.max.retries";  
 
   private static final String KEY_SELF_THROTTLE_ENABLE = "fs.azure.selfthrottling.enable";
   private static final String KEY_SELF_THROTTLE_READ_FACTOR = "fs.azure.selfthrottling.read.factor";
@@ -199,6 +208,11 @@ public class AzureNativeFileSystemStore implements NativeFileSystemStore {
   private static final int DEFAULT_MAX_BACKOFF_INTERVAL = 30 * 1000; // 30s
   private static final int DEFAULT_BACKOFF_INTERVAL = 1 * 1000; // 1s
   private static final int DEFAULT_MAX_RETRY_ATTEMPTS = 15;
+  
+  private static final int DEFAULT_COPYBLOB_MIN_BACKOFF_INTERVAL = 3  * 1000;
+  private static final int DEFAULT_COPYBLOB_MAX_BACKOFF_INTERVAL = 90 * 1000;
+  private static final int DEFAULT_COPYBLOB_BACKOFF_INTERVAL = 30 * 1000;
+  private static final int DEFAULT_COPYBLOB_MAX_RETRY_ATTEMPTS = 15;  
 
   // Self-throttling defaults. Allowed range = (0,1.0]
   // Value of 1.0 means no self-throttling.
@@ -2435,11 +2449,46 @@ public class AzureNativeFileSystemStore implements NativeFileSystemStore {
       // Rename the source blob to the destination blob by copying it to
       // the destination blob then deleting it.
       //
-      dstBlob.startCopyFromBlob(srcUri, getInstrumentedContext());
+      // Copy blob operation in Azure storage is very costly. It will be highly
+      // likely throttled during Azure storage gc. Short term fix will be using
+      // a more intensive exponential retry policy when the cluster is getting 
+      // throttled.
+      try {
+        dstBlob.startCopyFromBlob(srcUri, null, getInstrumentedContext());
+      } catch (StorageException se) {
+        if (se.getErrorCode().equals(
+		  StorageErrorCode.SERVER_BUSY.toString())) {
+          int copyBlobMinBackoff = sessionConfiguration.getInt(
+            KEY_COPYBLOB_MIN_BACKOFF_INTERVAL,
+			DEFAULT_COPYBLOB_MIN_BACKOFF_INTERVAL);
+
+          int copyBlobMaxBackoff = sessionConfiguration.getInt(
+            KEY_COPYBLOB_MAX_BACKOFF_INTERVAL,
+			DEFAULT_COPYBLOB_MAX_BACKOFF_INTERVAL);
+
+          int copyBlobDeltaBackoff = sessionConfiguration.getInt(
+            KEY_COPYBLOB_BACKOFF_INTERVAL,
+			DEFAULT_COPYBLOB_BACKOFF_INTERVAL);
+
+          int copyBlobMaxRetries = sessionConfiguration.getInt(
+            KEY_COPYBLOB_MAX_IO_RETRIES,
+			DEFAULT_COPYBLOB_MAX_RETRY_ATTEMPTS);
+	        
+          BlobRequestOptions options = new BlobRequestOptions();
+          options.setRetryPolicyFactory(new RetryExponentialRetry(
+            copyBlobMinBackoff, copyBlobDeltaBackoff, copyBlobMaxBackoff, 
+			copyBlobMaxRetries));
+          dstBlob.startCopyFromBlob(srcUri, options, getInstrumentedContext());
+        } else {
+          throw se;
+        }
+      }
       waitForCopyToComplete(dstBlob, getInstrumentedContext());
-
       safeDelete(srcBlob, lease);
-    } catch (Exception e) {
+    } catch (StorageException e) {
+      // Re-throw exception as an Azure storage exception.
+      throw new AzureException(e);
+    } catch (URISyntaxException e) {
       // Re-throw exception as an Azure storage exception.
       throw new AzureException(e);
     }

hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/StorageInterface.java

@@ -383,6 +383,10 @@ abstract class StorageInterface {
      *
      * @param source
      *            A <code>java.net.URI</code> The URI of a source blob.
+     * @param options
+     *            A {@link BlobRequestOptions} object that specifies any additional options for the request. Specifying
+     *            <code>null</code> will use the default request options from the associated service client (
+     *            {@link CloudBlobClient}).
      * @param opContext
      *            An {@link OperationContext} object that represents the context for the current operation. This object
      *            is used to track requests to the storage service, and to provide additional runtime information about
@@ -394,7 +398,7 @@ abstract class StorageInterface {
      *
      */
     public abstract void startCopyFromBlob(URI source,
-        OperationContext opContext)
+        BlobRequestOptions options, OperationContext opContext)
         throws StorageException, URISyntaxException;
     
     /**

hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/StorageInterfaceImpl.java

@@ -393,11 +393,11 @@ class StorageInterfaceImpl extends StorageInterface {
     }
 
     @Override
-    public void startCopyFromBlob(URI source,
+    public void startCopyFromBlob(URI source, BlobRequestOptions options,
         OperationContext opContext)
             throws StorageException, URISyntaxException {
       getBlob().startCopyFromBlob(source,
-          null, null, null, opContext);
+          null, null, options, opContext);
     }
 
     @Override

hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/MockStorageInterface.java

@@ -429,7 +429,7 @@ public class MockStorageInterface extends StorageInterface {
     }
 
     @Override
-    public void startCopyFromBlob(URI source,
+    public void startCopyFromBlob(URI source, BlobRequestOptions options,
         OperationContext opContext) throws StorageException, URISyntaxException {
       backingStore.copy(convertUriToDecodedString(source), convertUriToDecodedString(uri));
       //TODO: set the backingStore.properties.CopyState and