HADOOP-15837. DynamoDB table Update can fail S3A FS init.

Contributed by Steve Loughran.

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/s3guard/DynamoDBMetadataStore.java

@@ -42,6 +42,7 @@
 
 import com.amazonaws.AmazonClientException;
 import com.amazonaws.AmazonServiceException;
+import com.amazonaws.SdkBaseException;
 import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
 import com.amazonaws.services.dynamodbv2.document.BatchWriteItemOutcome;
@@ -66,6 +67,7 @@
 import com.amazonaws.services.dynamodbv2.model.Tag;
 import com.amazonaws.services.dynamodbv2.model.TagResourceRequest;
 import com.amazonaws.services.dynamodbv2.model.WriteRequest;
+import com.amazonaws.waiters.WaiterTimedOutException;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import org.slf4j.Logger;
@@ -78,6 +80,7 @@
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.s3a.AWSClientIOException;
 import org.apache.hadoop.fs.s3a.AWSCredentialProviderList;
 import org.apache.hadoop.fs.s3a.AWSServiceThrottledException;
 import org.apache.hadoop.fs.s3a.Constants;
@@ -1129,6 +1132,9 @@ public String toString() {
    * overall, this method is synchronous, and the table is guaranteed to exist
    * after this method returns successfully.
    *
+   * The wait for a table becoming active is Retry+Translated; it can fail
+   * while a table is not yet ready.
+   *
    * @throws IOException if table does not exist and auto-creation is disabled;
    * or table is being deleted, or any other I/O exception occurred.
    */
@@ -1144,7 +1150,6 @@ void initTable() throws IOException {
         final String status = description.getTableStatus();
         switch (status) {
         case "CREATING":
-        case "UPDATING":
           LOG.debug("Table {} in region {} is being created/updated. This may"
                   + " indicate that the table is being operated by another "
                   + "concurrent thread or process. Waiting for active...",
@@ -1155,6 +1160,10 @@ void initTable() throws IOException {
           throw new FileNotFoundException("DynamoDB table "
               + "'" + tableName + "' is being "
               + "deleted in region " + region);
+        case "UPDATING":
+          // table being updated; it can still be used.
+          LOG.debug("Table is being updated.");
+          break;
         case "ACTIVE":
           break;
         default:
@@ -1285,12 +1294,19 @@ static void verifyVersionCompatibility(String tableName,
    * @throws InterruptedIOException if the wait was interrupted
    * @throws IllegalArgumentException if an exception was raised in the waiter
    */
-  @Retries.OnceRaw
-  private void waitForTableActive(Table t) throws InterruptedIOException {
+  @Retries.RetryTranslated
+  private void waitForTableActive(Table t) throws IOException {
+    invoker.retry("Waiting for active state of table " + tableName,
+        null,
+        true,
+        () -> {
           try {
             t.waitForActive();
+          } catch (IllegalArgumentException ex) {
+            throw translateTableWaitFailure(tableName, ex);
           } catch (InterruptedException e) {
-      LOG.warn("Interrupted while waiting for table {} in region {} active",
+            LOG.warn("Interrupted while waiting for table {} in region {}"
+                    + " active",
                 tableName, region, e);
             Thread.currentThread().interrupt();
             throw (InterruptedIOException)
@@ -1298,11 +1314,14 @@ private void waitForTableActive(Table t) throws InterruptedIOException {
                     + tableName + "' is not active yet in region " + region)
                     .initCause(e);
           }
+        });
   }
 
   /**
    * Create a table, wait for it to become active, then add the version
    * marker.
+   * Creating an setting up the table isn't wrapped by any retry operations;
+   * the wait for a table to become available is RetryTranslated.
    * @param capacity capacity to provision
    * @throws IOException on any failure.
    * @throws InterruptedIOException if the wait was interrupted
@@ -1604,4 +1623,46 @@ public long getBatchWriteCapacityExceededCount() {
   public Invoker getInvoker() {
     return invoker;
   }
+
+  /**
+   * Take an {@code IllegalArgumentException} raised by a DDB operation
+   * and if it contains an inner SDK exception, unwrap it.
+   * @param ex exception.
+   * @return the inner AWS exception or null.
+   */
+  public static SdkBaseException extractInnerException(
+      IllegalArgumentException ex) {
+    if (ex.getCause() instanceof  SdkBaseException) {
+      return (SdkBaseException) ex.getCause();
+    } else {
+      return null;
+    }
+  }
+
+  /**
+   * Handle a table wait failure by extracting any inner cause and
+   * converting it, or, if unconvertable by wrapping
+   * the IllegalArgumentException in an IOE.
+   *
+   * @param name name of the table
+   * @param e exception
+   * @return an IOE to raise.
+   */
+  @VisibleForTesting
+  static IOException translateTableWaitFailure(
+      final String name, IllegalArgumentException e) {
+    final SdkBaseException ex = extractInnerException(e);
+    if (ex != null) {
+      if (ex instanceof WaiterTimedOutException) {
+        // a timeout waiting for state change: extract the
+        // message from the outer exception, but translate
+        // the inner one for the throttle policy.
+        return new AWSClientIOException(e.getMessage(), ex);
+      } else {
+        return translateException(e.getMessage(), name, ex);
+      }
+    } else {
+      return new IOException(e);
+    }
+  }
 }

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/s3guard/TestDynamoDBMiscOperations.java

@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.fs.s3a.s3guard;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException;
+import com.amazonaws.waiters.WaiterTimedOutException;
+import org.junit.Test;
+
+import org.apache.hadoop.fs.s3a.AWSClientIOException;
+import org.apache.hadoop.test.HadoopTestBase;
+
+import static org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.translateTableWaitFailure;
+import static org.apache.hadoop.test.LambdaTestUtils.intercept;
+
+/**
+ * Unit test suite for misc dynamoDB metastore operations.
+ */
+public class TestDynamoDBMiscOperations extends HadoopTestBase {
+
+  private static final String TIMEOUT_ERROR_MESSAGE
+      = "Table table-name did not transition into ACTIVE state.";
+
+  @Test
+  public void testUnwrapTableWaitTimeout() throws Throwable {
+    final Exception waiterTimedOut =
+        new WaiterTimedOutException("waiter timed out");
+    final AWSClientIOException ex = intercept(AWSClientIOException.class,
+        TIMEOUT_ERROR_MESSAGE,
+        () -> {
+          throw translateTableWaitFailure("example",
+              new IllegalArgumentException(TIMEOUT_ERROR_MESSAGE,
+                  waiterTimedOut));
+        });
+    assertEquals(waiterTimedOut, ex.getCause());
+  }
+
+  @Test
+  public void testTranslateIllegalArgumentException() throws Throwable {
+    final IllegalArgumentException e =
+        new IllegalArgumentException(TIMEOUT_ERROR_MESSAGE);
+    final IOException ex = intercept(IOException.class,
+        TIMEOUT_ERROR_MESSAGE,
+        () -> {
+          throw translateTableWaitFailure("example", e);
+        });
+    assertEquals(e, ex.getCause());
+  }
+
+  @Test
+  public void testTranslateWrappedDDBException() throws Throwable {
+    final Exception inner = new ResourceNotFoundException("ddb");
+    final IllegalArgumentException e =
+        new IllegalArgumentException("outer", inner);
+    final FileNotFoundException ex = intercept(FileNotFoundException.class,
+        "outer",
+        () -> {
+          throw translateTableWaitFailure("example", e);
+        });
+    assertEquals(inner, ex.getCause());
+  }
+
+  @Test
+  public void testTranslateWrappedOtherException() throws Throwable {
+    final Exception inner = new NullPointerException("npe");
+    final IllegalArgumentException e =
+        new IllegalArgumentException("outer", inner);
+    final IOException ex = intercept(IOException.class,
+        "outer",
+        () -> {
+          throw translateTableWaitFailure("example", e);
+        });
+    assertEquals(e, ex.getCause());
+  }
+
+}