YARN-8910. Fixed misleading log statement when container max retries is infinite.

           Contributed by Chandni Singh

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/container/ContainerImpl.java

@@ -1653,10 +1653,17 @@ public class ContainerImpl implements Container {
 
     private void doRelaunch(final ContainerImpl container,
         int remainingRetryAttempts, final int retryInterval) {
-      LOG.info("Relaunching Container " + container.getContainerId()
-          + ". Remaining retry attempts(after relaunch) : "
-          + remainingRetryAttempts + ". Interval between retries is "
-          + retryInterval + "ms");
+      if (remainingRetryAttempts == ContainerRetryContext.RETRY_FOREVER) {
+        LOG.info("Relaunching Container {}. " +
+                "retry interval {} ms", container.getContainerId(),
+            retryInterval);
+      } else {
+        LOG.info("Relaunching Container {}. " +
+                "remaining retry attempts(after relaunch) {}, " +
+                "retry interval {} ms", container.getContainerId(),
+            remainingRetryAttempts, retryInterval);
+      }
+
       container.wasLaunched  = false;
       container.metrics.endRunningContainer();
       if (retryInterval == 0) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/container/SlidingWindowRetryPolicy.java

@@ -153,6 +153,10 @@ public class SlidingWindowRetryPolicy {
     }
 
     int getRemainingRetries() {
+      if (containerRetryContext.getMaxRetries() ==
+          ContainerRetryContext.RETRY_FOREVER) {
+        return ContainerRetryContext.RETRY_FOREVER;
+      }
       return remainingRetries;
     }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/container/TestSlidingWindowRetryPolicy.java

@@ -43,8 +43,12 @@ public class TestSlidingWindowRetryPolicy {
   public void testNeverRetry() {
     ContainerRetryContext retryContext =
         ContainerRetryContext.NEVER_RETRY_CONTEXT;
-    Assert.assertFalse("never retry", retryPolicy.shouldRetry(
-        new SlidingWindowRetryPolicy.RetryContext(retryContext), 12));
+    SlidingWindowRetryPolicy.RetryContext windowContext = new
+        SlidingWindowRetryPolicy.RetryContext(retryContext);
+    Assert.assertFalse("never retry", retryPolicy.shouldRetry(windowContext,
+        12));
+    Assert.assertEquals("remaining retries", 0,
+        windowContext.getRemainingRetries());
   }
 
   @Test
@@ -52,8 +56,13 @@ public class TestSlidingWindowRetryPolicy {
     ContainerRetryContext retryContext =  ContainerRetryContext.newInstance(
         ContainerRetryPolicy.RETRY_ON_ALL_ERRORS, null, -1,
         0, 10);
-    Assert.assertTrue("always retry", retryPolicy.shouldRetry(
-        new SlidingWindowRetryPolicy.RetryContext(retryContext), 12));
+    SlidingWindowRetryPolicy.RetryContext windowContext = new
+        SlidingWindowRetryPolicy.RetryContext(retryContext);
+    Assert.assertTrue("always retry", retryPolicy.shouldRetry(windowContext,
+        12));
+    Assert.assertEquals("remaining retries",
+        ContainerRetryContext.RETRY_FOREVER,
+        windowContext.getRemainingRetries());
   }
 
   @Test
@@ -65,19 +74,28 @@ public class TestSlidingWindowRetryPolicy {
     Assert.assertTrue("retry 1",
         retryPolicy.shouldRetry(windowRetryContext, 12));
     retryPolicy.updateRetryContext(windowRetryContext);
+    Assert.assertEquals("remaining retries", 1,
+        windowRetryContext.getRemainingRetries());
 
     clock.setTime(20);
     Assert.assertTrue("retry 2",
         retryPolicy.shouldRetry(windowRetryContext, 12));
     retryPolicy.updateRetryContext(windowRetryContext);
+    Assert.assertEquals("remaining retries", 1,
+        windowRetryContext.getRemainingRetries());
 
     clock.setTime(40);
     Assert.assertTrue("retry 3",
         retryPolicy.shouldRetry(windowRetryContext, 12));
     retryPolicy.updateRetryContext(windowRetryContext);
+    Assert.assertEquals("remaining retries", 1,
+        windowRetryContext.getRemainingRetries());
 
     clock.setTime(45);
     Assert.assertFalse("retry failed",
         retryPolicy.shouldRetry(windowRetryContext, 12));
+    retryPolicy.updateRetryContext(windowRetryContext);
+    Assert.assertEquals("remaining retries", 0,
+        windowRetryContext.getRemainingRetries());
   }
 }