YARN-590. Added an optional mesage to be returned by ResourceMaanger when RM asks an RM to shutdown/resync etc so that NMs can log this message locally for better debuggability. Contributed by Mayank Bansal.

svn merge --ignore-ancestry -c 1481234 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1481235 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -171,6 +171,10 @@ Release 2.0.5-beta - UNRELEASED
     YARN-663. Changed ResourceTracker API and LocalizationProtocol API to throw
     YarnRemoteException and IOException. (Xuan Gong via vinodkv)
 
+    YARN-590. Added an optional mesage to be returned by ResourceMaanger when RM
+    asks an RM to shutdown/resync etc so that NMs can log this message locally
+    for better debuggability. (Mayank Bansal via vinodkv)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/NodeHeartbeatResponse.java

@@ -45,4 +45,8 @@ public interface NodeHeartbeatResponse {
 
   long getNextHeartBeatInterval();
   void setNextHeartBeatInterval(long nextHeartBeatInterval);
+  
+  String getDiagnosticsMessage();
+
+  void setDiagnosticsMessage(String diagnosticsMessage);
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/RegisterNodeManagerResponse.java

@@ -33,4 +33,9 @@ public interface RegisterNodeManagerResponse {
   long getRMIdentifier();
 
   void setRMIdentifier(long rmIdentifier);
+
+  String getDiagnosticsMessage();
+
+  void setDiagnosticsMessage(String diagnosticsMessage);
+
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/NodeHeartbeatResponsePBImpl.java

@@ -145,6 +145,25 @@ public class NodeHeartbeatResponsePBImpl extends ProtoBase<NodeHeartbeatResponse
     builder.setNodeAction(convertToProtoFormat(nodeAction));
   }
 
+  @Override
+  public String getDiagnosticsMessage() {
+    NodeHeartbeatResponseProtoOrBuilder p = viaProto ? proto : builder;
+    if (!p.hasDiagnosticsMessage()) {
+      return null;
+    }
+    return p.getDiagnosticsMessage();
+  }
+
+  @Override
+  public void setDiagnosticsMessage(String diagnosticsMessage) {
+    maybeInitBuilder();
+    if (diagnosticsMessage == null) {
+      builder.clearDiagnosticsMessage();
+      return;
+    }
+    builder.setDiagnosticsMessage((diagnosticsMessage));
+  }
+
   @Override
   public List<ContainerId> getContainersToCleanup() {
     initContainersToCleanup();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/api/protocolrecords/impl/pb/RegisterNodeManagerResponsePBImpl.java

@@ -101,6 +101,25 @@ public class RegisterNodeManagerResponsePBImpl extends ProtoBase<RegisterNodeMan
     rebuild = true;
   }
 
+  @Override
+  public String getDiagnosticsMessage() {
+    RegisterNodeManagerResponseProtoOrBuilder p = viaProto ? proto : builder;
+    if (!p.hasDiagnosticsMessage()) {
+      return null;
+    }
+    return p.getDiagnosticsMessage();
+  }
+
+  @Override
+  public void setDiagnosticsMessage(String diagnosticsMessage) {
+    maybeInitBuilder();
+    if (diagnosticsMessage == null) {
+      builder.clearDiagnosticsMessage();
+      return;
+    }
+    builder.setDiagnosticsMessage((diagnosticsMessage));
+  }
+
   @Override
   public NodeAction getNodeAction() {
     RegisterNodeManagerResponseProtoOrBuilder p = viaProto ? proto : builder;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/proto/yarn_server_common_service_protos.proto

@@ -34,6 +34,7 @@ message RegisterNodeManagerResponseProto {
   optional MasterKeyProto master_key = 1;
   optional NodeActionProto nodeAction = 2;
   optional int64 rm_identifier = 3;
+  optional string diagnostics_message = 4;
 }
 
 message NodeHeartbeatRequestProto {
@@ -49,4 +50,5 @@ message NodeHeartbeatResponseProto {
   repeated ContainerIdProto containers_to_cleanup = 4;
   repeated ApplicationIdProto applications_to_cleanup = 5;
   optional int64 nextHeartBeatInterval = 6;
+  optional string diagnostics_message = 7;
 }

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

@@ -295,8 +295,12 @@ public class NodeStatusUpdaterImpl extends AbstractService implements
     }
     // if the Resourcemanager instructs NM to shutdown.
     if (NodeAction.SHUTDOWN.equals(regNMResponse.getNodeAction())) {
+      String message =
+          "Message from ResourceManager: "
+              + regNMResponse.getDiagnosticsMessage();
       throw new YarnException(
-          "Recieved SHUTDOWN signal from Resourcemanager ,Registration of NodeManager failed");
+        "Recieved SHUTDOWN signal from Resourcemanager ,Registration of NodeManager failed, "
+            + message);
     }
 
     if (UserGroupInformation.isSecurityEnabled()) {
@@ -482,15 +486,19 @@ public class NodeStatusUpdaterImpl extends AbstractService implements
 
             if (response.getNodeAction() == NodeAction.SHUTDOWN) {
               LOG
-                  .info("Recieved SHUTDOWN signal from Resourcemanager as part of heartbeat," +
+                .warn("Recieved SHUTDOWN signal from Resourcemanager as part of heartbeat,"
-                      " hence shutting down.");
+                    + " hence shutting down.");
+              LOG.warn("Message from ResourceManager: "
+                  + response.getDiagnosticsMessage());
               dispatcher.getEventHandler().handle(
                   new NodeManagerEvent(NodeManagerEventType.SHUTDOWN));
               break;
             }
             if (response.getNodeAction() == NodeAction.RESYNC) {
-              LOG.info("Node is out of sync with ResourceManager,"
+              LOG.warn("Node is out of sync with ResourceManager,"
                   + " hence rebooting.");
+              LOG.warn("Message from ResourceManager: "
+                  + response.getDiagnosticsMessage());
               // Invalidate the RMIdentifier while resync
               NodeStatusUpdaterImpl.this.rmIdentifier =
                   ResourceManagerConstants.RM_INVALID_IDENTIFIER;

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

@@ -388,6 +388,7 @@ public class TestNodeStatusUpdater {
   private class MyResourceTracker2 implements ResourceTracker {
     public NodeAction heartBeatNodeAction = NodeAction.NORMAL;
     public NodeAction registerNodeAction = NodeAction.NORMAL;
+    public String shutDownMessage = "";
 
     @Override
     public RegisterNodeManagerResponse registerNodeManager(
@@ -397,6 +398,7 @@ public class TestNodeStatusUpdater {
       RegisterNodeManagerResponse response = recordFactory
           .newRecordInstance(RegisterNodeManagerResponse.class);
       response.setNodeAction(registerNodeAction );
+      response.setDiagnosticsMessage(shutDownMessage);
       return response;
     }
     @Override
@@ -408,6 +410,7 @@ public class TestNodeStatusUpdater {
       NodeHeartbeatResponse nhResponse = YarnServerBuilderUtils.
           newNodeHeartbeatResponse(heartBeatID, heartBeatNodeAction, null,
               null, null, 1000L);
+      nhResponse.setDiagnosticsMessage(shutDownMessage);
       return nhResponse;
     }
   }
@@ -737,12 +740,15 @@ public class TestNodeStatusUpdater {
             context, dispatcher, healthChecker, metrics);
         MyResourceTracker2 myResourceTracker2 = new MyResourceTracker2();
         myResourceTracker2.registerNodeAction = NodeAction.SHUTDOWN;
+        myResourceTracker2.shutDownMessage = "RM Shutting Down Node";
         nodeStatusUpdater.resourceTracker = myResourceTracker2;
         return nodeStatusUpdater;
       }
     };
     verifyNodeStartFailure("org.apache.hadoop.yarn.YarnException: "
-        + "Recieved SHUTDOWN signal from Resourcemanager ,Registration of NodeManager failed");
+        + "Recieved SHUTDOWN signal from Resourcemanager ,"
+        + "Registration of NodeManager failed, "
+        + "Message from ResourceManager: RM Shutting Down Node");
   }
 
   @Test (timeout = 15000)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceTrackerService.java

@@ -176,8 +176,11 @@ public class ResourceTrackerService extends AbstractService implements
 
     // Check if this node is a 'valid' node
     if (!this.nodesListManager.isValidNode(host)) {
-      LOG.info("Disallowed NodeManager from  " + host
+      String message =
-          + ", Sending SHUTDOWN signal to the NodeManager.");
+          "Disallowed NodeManager from  " + host
+              + ", Sending SHUTDOWN signal to the NodeManager.";
+      LOG.info(message);
+      response.setDiagnosticsMessage(message);
       response.setNodeAction(NodeAction.SHUTDOWN);
       return response;
     }
@@ -185,9 +188,12 @@ public class ResourceTrackerService extends AbstractService implements
     // Check if this node has minimum allocations
     if (capability.getMemory() < minAllocMb
         || capability.getVirtualCores() < minAllocVcores) {
-      LOG.info("NodeManager from  " + host
+      String message =
+          "NodeManager from  " + host
               + " doesn't satisfy minimum allocations, Sending SHUTDOWN"
-          + " signal to the NodeManager.");
+              + " signal to the NodeManager.";
+      LOG.info(message);
+      response.setDiagnosticsMessage(message);
       response.setNodeAction(NodeAction.SHUTDOWN);
       return response;
     }
@@ -214,10 +220,11 @@ public class ResourceTrackerService extends AbstractService implements
 
     this.nmLivelinessMonitor.register(nodeId);
 
-    LOG.info("NodeManager from node " + host + "(cmPort: " + cmPort
+    String message =
-        + " httpPort: " + httpPort + ") " + "registered with capability: "
+        "NodeManager from node " + host + "(cmPort: " + cmPort + " httpPort: "
-        + capability + ", assigned nodeId " + nodeId);
+            + httpPort + ") " + "registered with capability: " + capability
-
+            + ", assigned nodeId " + nodeId;
+    LOG.info(message);
     response.setNodeAction(NodeAction.NORMAL);
     response.setRMIdentifier(ResourceManager.clusterTimeStamp);
     return response;
@@ -243,7 +250,9 @@ public class ResourceTrackerService extends AbstractService implements
     RMNode rmNode = this.rmContext.getRMNodes().get(nodeId);
     if (rmNode == null) {
       /* node does not exist */
-      LOG.info("Node not found rebooting " + remoteNodeStatus.getNodeId());
+      String message = "Node not found rebooting " + remoteNodeStatus.getNodeId();
+      LOG.info(message);
+      resync.setDiagnosticsMessage(message);
       return resync;
     }
 
@@ -252,8 +261,11 @@ public class ResourceTrackerService extends AbstractService implements
 
     // 2. Check if it's a valid (i.e. not excluded) node
     if (!this.nodesListManager.isValidNode(rmNode.getHostName())) {
-      LOG.info("Disallowed NodeManager nodeId: " + nodeId + " hostname: "
+      String message =
-          + rmNode.getNodeAddress());
+          "Disallowed NodeManager nodeId: " + nodeId + " hostname: "
+              + rmNode.getNodeAddress();
+      LOG.info(message);
+      shutDown.setDiagnosticsMessage(message);
       this.rmContext.getDispatcher().getEventHandler().handle(
           new RMNodeEvent(nodeId, RMNodeEventType.DECOMMISSION));
       return shutDown;
@@ -268,9 +280,12 @@ public class ResourceTrackerService extends AbstractService implements
       return lastNodeHeartbeatResponse;
     } else if (remoteNodeStatus.getResponseId() + 1 < lastNodeHeartbeatResponse
         .getResponseId()) {
-      LOG.info("Too far behind rm response id:"
+      String message =
+          "Too far behind rm response id:"
               + lastNodeHeartbeatResponse.getResponseId() + " nm response id:"
-          + remoteNodeStatus.getResponseId());
+              + remoteNodeStatus.getResponseId();
+      LOG.info(message);
+      resync.setDiagnosticsMessage(message);
       // TODO: Just sending reboot is not enough. Think more.
       this.rmContext.getDispatcher().getEventHandler().handle(
           new RMNodeEvent(nodeId, RMNodeEventType.REBOOTING));

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestResourceTrackerService.java

@@ -268,6 +268,10 @@ public class TestResourceTrackerService {
     // trying to register a invalid node.
     RegisterNodeManagerResponse response = resourceTrackerService.registerNodeManager(req);
     Assert.assertEquals(NodeAction.SHUTDOWN,response.getNodeAction());
+    Assert
+      .assertEquals(
+        "Disallowed NodeManager from  host2, Sending SHUTDOWN signal to the NodeManager.",
+        response.getDiagnosticsMessage());
   }
 
   @Test
@@ -344,6 +348,8 @@ public class TestResourceTrackerService {
     nodeHeartbeat = nm2.nodeHeartbeat(
       new HashMap<ApplicationId, List<ContainerStatus>>(), true, -100);
     Assert.assertTrue(NodeAction.RESYNC.equals(nodeHeartbeat.getNodeAction()));
+    Assert.assertEquals("Too far behind rm response id:0 nm response id:-100",
+      nodeHeartbeat.getDiagnosticsMessage());
     checkRebootedNMCount(rm, ++initialMetricCount);
   }
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/resourcetracker/TestRMNMRPCResponseId.java

@@ -133,5 +133,7 @@ public class TestRMNMRPCResponseId {
     nodeStatus.setResponseId(0);
     response = resourceTrackerService.nodeHeartbeat(nodeHeartBeatRequest);
     Assert.assertTrue(NodeAction.RESYNC.equals(response.getNodeAction()));
+    Assert.assertEquals("Too far behind rm response id:2 nm response id:0",
+      response.getDiagnosticsMessage());
   }
 }