HBASE-22316 Record the stack trace for current thread in FutureUtils.get

hbase-common/src/main/java/org/apache/hadoop/hbase/util/FutureUtils.java

@@ -29,8 +29,6 @@ import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.apache.hbase.thirdparty.com.google.common.base.Throwables;
-
 /**
  * Helper class for processing futures.
  */
@@ -119,6 +117,41 @@ public final class FutureUtils {
     return error;
   }
 
+  // This method is used to record the stack trace that calling the FutureUtils.get method. As in
+  // async client, the retry will be done in the retry timer thread, so the exception we get from
+  // the CompletableFuture will have a stack trace starting from the root of the retry timer. If we
+  // just throw this exception out when calling future.get(by unwrapping the ExecutionException),
+  // the upper layer even can not know where is the exception thrown...
+  // See HBASE-22316.
+  private static void setStackTrace(Throwable error) {
+    StackTraceElement[] localStackTrace = Thread.currentThread().getStackTrace();
+    StackTraceElement[] originalStackTrace = error.getStackTrace();
+    StackTraceElement[] newStackTrace =
+      new StackTraceElement[localStackTrace.length + originalStackTrace.length + 1];
+    System.arraycopy(localStackTrace, 0, newStackTrace, 0, localStackTrace.length);
+    newStackTrace[localStackTrace.length] =
+      new StackTraceElement("--------Future", "get--------", null, -1);
+    System.arraycopy(originalStackTrace, 0, newStackTrace, localStackTrace.length + 1,
+      originalStackTrace.length);
+    error.setStackTrace(newStackTrace);
+  }
+
+  private static IOException rethrow(ExecutionException error) throws IOException {
+    Throwable cause = error.getCause();
+    if (cause instanceof IOException) {
+      setStackTrace(cause);
+      throw (IOException) cause;
+    } else if (cause instanceof RuntimeException) {
+      setStackTrace(cause);
+      throw (RuntimeException) cause;
+    } else if (cause instanceof Error) {
+      setStackTrace(cause);
+      throw (Error) cause;
+    } else {
+      throw new IOException(cause);
+    }
+  }
+
   /**
    * A helper class for getting the result of a Future, and convert the error to an
    * {@link IOException}.
@@ -129,9 +162,7 @@ public final class FutureUtils {
     } catch (InterruptedException e) {
       throw (IOException) new InterruptedIOException().initCause(e);
     } catch (ExecutionException e) {
-      Throwable cause = e.getCause();
-      Throwables.propagateIfPossible(cause, IOException.class);
-      throw new IOException(cause);
+      throw rethrow(e);
     }
   }
 

hbase-common/src/test/java/org/apache/hadoop/hbase/util/TestFutureUtils.java

@@ -0,0 +1,85 @@
+/**
+ * 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.hbase.util;
+
+import static org.hamcrest.CoreMatchers.startsWith;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.IOException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.stream.Stream;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseIOException;
+import org.apache.hadoop.hbase.testclassification.MiscTests;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
+
+@Category({ MiscTests.class, SmallTests.class })
+public class TestFutureUtils {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestFutureUtils.class);
+
+  private ExecutorService executor;
+
+  @Before
+  public void setUp() {
+    executor = Executors.newFixedThreadPool(1, new ThreadFactoryBuilder().setDaemon(true).build());
+  }
+
+  @After
+  public void tearDown() {
+    executor.shutdownNow();
+  }
+
+  @Test
+  public void testRecordStackTrace() throws IOException {
+    CompletableFuture<Void> future = new CompletableFuture<>();
+    executor.execute(() -> future.completeExceptionally(new HBaseIOException("Inject error!")));
+    try {
+      FutureUtils.get(future);
+      fail("The future should have been completed exceptionally");
+    } catch (HBaseIOException e) {
+      assertEquals("Inject error!", e.getMessage());
+      StackTraceElement[] elements = e.getStackTrace();
+      assertThat(elements[0].toString(), startsWith("java.lang.Thread.getStackTrace"));
+      assertThat(elements[1].toString(),
+        startsWith("org.apache.hadoop.hbase.util.FutureUtils.setStackTrace"));
+      assertThat(elements[2].toString(),
+        startsWith("org.apache.hadoop.hbase.util.FutureUtils.rethrow"));
+      assertThat(elements[3].toString(),
+        startsWith("org.apache.hadoop.hbase.util.FutureUtils.get"));
+      assertThat(elements[4].toString(),
+        startsWith("org.apache.hadoop.hbase.util.TestFutureUtils.testRecordStackTrace"));
+      assertTrue(Stream.of(elements)
+        .anyMatch(element -> element.toString().contains("--------Future.get--------")));
+    }
+  }
+}