YARN-7585. NodeManager should go unhealthy when state store throws DBException. Contributed by Wilfred Spiegelenburg.

(cherry picked from commit 7f515f57ede74dae787994f37bfafd5d20c9aa4c)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeManager.java

@@ -456,6 +456,7 @@ protected void serviceInit(Configuration conf) throws Exception {
     // so that we make sure everything is up before registering with RM. 
     addService(nodeStatusUpdater);
     ((NMContext) context).setNodeStatusUpdater(nodeStatusUpdater);
+    nmStore.setNodeStatusUpdater(nodeStatusUpdater);
 
     // Do secure login before calling init for added services.
     try {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/recovery/NMLeveldbStateStoreService.java

@@ -47,6 +47,7 @@
 import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
 import org.apache.hadoop.yarn.server.api.records.MasterKey;
 import org.apache.hadoop.yarn.server.api.records.impl.pb.MasterKeyPBImpl;
+import org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdater;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ResourceMappings;
 import org.apache.hadoop.yarn.server.records.Version;
@@ -158,6 +159,7 @@ public class NMLeveldbStateStoreService extends NMStateStoreService {
 
   private DB db;
   private boolean isNewlyCreated;
+  private boolean isHealthy;
   private Timer compactionTimer;
 
   /**
@@ -172,6 +174,8 @@ public NMLeveldbStateStoreService() {
 
   @Override
   protected void startStorage() throws IOException {
+    // Assume that we're healthy when we start
+    isHealthy = true;
   }
 
   @Override
@@ -190,6 +194,36 @@ public boolean isNewlyCreated() {
     return isNewlyCreated;
   }
 
+  /**
+   * If the state store throws an error after recovery has been performed
+   * then we can not trust it any more to reflect the NM state. We need to
+   * mark the store and node unhealthy.
+   * Errors during the recovery will cause a service failure and thus a NM
+   * start failure. Do not need to mark the store unhealthy for those.
+   * @param dbErr Exception
+   */
+  private void markStoreUnHealthy(DBException dbErr) {
+    // Always log the error here, we might not see the error in the caller
+    LOG.error("Statestore exception: ", dbErr);
+    // We have already been marked unhealthy so no need to do it again.
+    if (!isHealthy) {
+      return;
+    }
+    // Mark unhealthy, an out of band heartbeat will be sent and the state
+    // will remain unhealthy (not recoverable).
+    // No need to close the store: does not make any difference at this point.
+    isHealthy = false;
+    // We could get here before the nodeStatusUpdater is set
+    NodeStatusUpdater nsu = getNodeStatusUpdater();
+    if (nsu != null) {
+      nsu.reportException(dbErr);
+    }
+  }
+
+  @VisibleForTesting
+  boolean isHealthy() {
+    return isHealthy;
+  }
 
   @Override
   public List<RecoveredContainerState> loadContainersState()
@@ -362,6 +396,7 @@ public void storeContainer(ContainerId containerId, int containerVersion,
         db.write(batch);
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -386,6 +421,7 @@ public void storeContainerQueued(ContainerId containerId) throws IOException {
     try {
       db.put(bytes(key), EMPTY_VALUE);
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -401,6 +437,7 @@ private void removeContainerQueued(ContainerId containerId)
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -416,6 +453,7 @@ public void storeContainerPaused(ContainerId containerId) throws IOException {
     try {
       db.put(bytes(key), EMPTY_VALUE);
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -432,6 +470,7 @@ public void removeContainerPaused(ContainerId containerId)
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -449,6 +488,7 @@ public void storeContainerDiagnostics(ContainerId containerId,
     try {
       db.put(bytes(key), bytes(diagnostics.toString()));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -467,6 +507,7 @@ public void storeContainerLaunched(ContainerId containerId)
     try {
       db.put(bytes(key), EMPTY_VALUE);
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -496,6 +537,7 @@ public void storeContainerUpdateToken(ContainerId containerId,
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -512,6 +554,7 @@ public void storeContainerKilled(ContainerId containerId)
     try {
       db.put(bytes(key), EMPTY_VALUE);
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -528,6 +571,7 @@ public void storeContainerCompleted(ContainerId containerId,
     try {
       db.put(bytes(key), bytes(Integer.toString(exitCode)));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -540,6 +584,7 @@ public void storeContainerRemainingRetryAttempts(ContainerId containerId,
     try {
       db.put(bytes(key), bytes(Integer.toString(remainingRetryAttempts)));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -552,6 +597,7 @@ public void storeContainerWorkDir(ContainerId containerId,
     try {
       db.put(bytes(key), bytes(workDir));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -564,6 +610,7 @@ public void storeContainerLogDir(ContainerId containerId,
     try {
       db.put(bytes(key), bytes(logDir));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -597,6 +644,7 @@ public void removeContainer(ContainerId containerId)
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -646,6 +694,7 @@ public void storeApplication(ApplicationId appId,
     try {
       db.put(bytes(key), p.toByteArray());
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -667,6 +716,7 @@ public void removeApplication(ApplicationId appId)
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -823,6 +873,7 @@ public void startResourceLocalization(String user, ApplicationId appId,
     try {
       db.put(bytes(key), proto.toByteArray());
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -846,6 +897,7 @@ public void finishResourceLocalization(String user, ApplicationId appId,
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -869,6 +921,7 @@ public void removeLocalizedResource(String user, ApplicationId appId,
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -934,6 +987,7 @@ public void storeDeletionTask(int taskId,
     try {
       db.put(bytes(key), taskProto.toByteArray());
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -944,6 +998,7 @@ public void removeDeletionTask(int taskId) throws IOException {
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1017,6 +1072,7 @@ public void removeNMTokenApplicationMasterKey(
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1031,6 +1087,7 @@ private void storeMasterKey(String dbKey, MasterKey key)
     try {
       db.put(bytes(dbKey), pb.getProto().toByteArray());
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1104,6 +1161,7 @@ public void storeContainerToken(ContainerId containerId, Long expTime)
     try {
       db.put(bytes(key), bytes(expTime.toString()));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1115,6 +1173,7 @@ public void removeContainerToken(ContainerId containerId)
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1165,6 +1224,7 @@ public void storeLogDeleter(ApplicationId appId, LogDeleterProto proto)
     try {
       db.put(bytes(key), proto.toByteArray());
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1175,6 +1235,7 @@ public void removeLogDeleter(ApplicationId appId) throws IOException {
     try {
       db.delete(bytes(key));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1207,6 +1268,7 @@ public void storeAssignedResources(Container container,
         batch.close();
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
 
@@ -1370,6 +1432,7 @@ public void storeAMRMProxyNextMasterKey(MasterKey key) throws IOException {
       try {
         db.delete(bytes(dbkey));
       } catch (DBException e) {
+        markStoreUnHealthy(e);
         throw new IOException(e);
       }
       return;
@@ -1384,6 +1447,7 @@ public void storeAMRMProxyAppContextEntry(ApplicationAttemptId attempt,
     try {
       db.put(bytes(fullkey), data);
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1395,6 +1459,7 @@ public void removeAMRMProxyAppContextEntry(ApplicationAttemptId attempt,
     try {
       db.delete(bytes(fullkey));
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1418,6 +1483,7 @@ public void removeAMRMProxyAppContext(ApplicationAttemptId attempt)
         candidates.add(key);
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     } finally {
       if (iter != null) {
@@ -1431,6 +1497,7 @@ public void removeAMRMProxyAppContext(ApplicationAttemptId attempt)
         db.delete(bytes(key));
       }
     } catch (DBException e) {
+      markStoreUnHealthy(e);
       throw new IOException(e);
     }
   }
@@ -1552,6 +1619,11 @@ DB getDB() {
     return db;
   }
 
+  @VisibleForTesting
+  void setDB(DB testDb) {
+    this.db = testDb;
+  }
+
   /**
    * 1) Versioning scheme: major.minor. For e.g. 1.0, 1.1, 1.2...1.25, 2.0 etc.
    * 2) Any incompatible change of state-store is a major upgrade, and any

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/recovery/NMStateStoreService.java

@@ -44,6 +44,7 @@
 import org.apache.hadoop.yarn.proto.YarnServerNodemanagerRecoveryProtos.LogDeleterProto;
 import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
 import org.apache.hadoop.yarn.server.api.records.MasterKey;
+import org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdater;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
 import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ResourceMappings;
 
@@ -51,10 +52,20 @@
 @Unstable
 public abstract class NMStateStoreService extends AbstractService {
 
+  private NodeStatusUpdater nodeStatusUpdater = null;
+
   public NMStateStoreService(String name) {
     super(name);
   }
 
+  protected NodeStatusUpdater getNodeStatusUpdater() {
+    return nodeStatusUpdater;
+  }
+
+  public void setNodeStatusUpdater(NodeStatusUpdater nodeStatusUpdater) {
+    this.nodeStatusUpdater = nodeStatusUpdater;
+  }
+
   public static class RecoveredApplicationsState {
     List<ContainerManagerApplicationProto> applications;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/recovery/TestNMLeveldbStateStoreService.java

@@ -25,6 +25,7 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.isNull;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.timeout;
@@ -89,10 +90,12 @@
 import org.apache.hadoop.yarn.server.security.BaseNMTokenSecretManager;
 import org.apache.hadoop.yarn.server.utils.BuilderUtils;
 import org.iq80.leveldb.DB;
+import org.iq80.leveldb.DBException;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
+import org.mockito.Mockito;
 
 public class TestNMLeveldbStateStoreService {
   private static final File TMP_DIR = new File(
@@ -1185,6 +1188,38 @@ public void testStateStoreForResourceMapping() throws IOException {
         resourceMappings.getAssignedResources("numa").equals(numaRes));
   }
 
+  @Test
+  public void testStateStoreNodeHealth() throws IOException {
+    // keep the working DB clean, break a temp DB
+    DB keepDB = stateStore.getDB();
+    DB myMocked = mock(DB.class);
+    stateStore.setDB(myMocked);
+
+    ApplicationId appId = ApplicationId.newInstance(1234, 1);
+    ApplicationAttemptId appAttemptId =
+        ApplicationAttemptId.newInstance(appId, 1);
+    DBException toThrow = new DBException();
+    Mockito.doThrow(toThrow).when(myMocked).
+        put(any(byte[].class), any(byte[].class));
+    // write some data
+    try {
+      // chosen a simple method could be any of the "void" methods
+      ContainerId containerId = ContainerId.newContainerId(appAttemptId, 1);
+      stateStore.storeContainerKilled(containerId);
+    } catch (IOException ioErr) {
+      // Cause should be wrapped DBException
+      assertTrue(ioErr.getCause() instanceof DBException);
+      // check the store is marked unhealthy
+      assertFalse("Statestore should have been unhealthy",
+          stateStore.isHealthy());
+      return;
+    } finally {
+      // restore the working DB
+      stateStore.setDB(keepDB);
+    }
+    Assert.fail("Expected exception not thrown");
+  }
+
   private StartContainerRequest storeMockContainer(ContainerId containerId)
       throws IOException {
     // create a container request