YARN-4439. Clarify NMContainerStatus#toString method. Contributed by Jian He

hadoop-yarn-project/CHANGES.txt

@@ -46,6 +46,8 @@ Release 2.7.3 - UNRELEASED
     YARN-4422. Generic AHS sometimes doesn't show started, node, or logs on App page
     (Eric Payne via jeagles)
 
+    YARN-4439. Clarify NMContainerStatus#toString method. (Jian He via xgong)
+
     MAPREDUCE-6436. JobHistory cache issue. (Kai Sasaki via zxu)
 
 Release 2.7.2 - UNRELEASED

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

@@ -34,8 +34,6 @@ import org.apache.hadoop.yarn.proto.YarnServerCommonServiceProtos.NMContainerSta
 import org.apache.hadoop.yarn.proto.YarnServerCommonServiceProtos.NMContainerStatusProtoOrBuilder;
 import org.apache.hadoop.yarn.server.api.protocolrecords.NMContainerStatus;
 
-import com.google.protobuf.TextFormat;
-
 public class NMContainerStatusPBImpl extends NMContainerStatus {
 
   NMContainerStatusProto proto = NMContainerStatusProto
@@ -81,7 +79,16 @@ public class NMContainerStatusPBImpl extends NMContainerStatus {
 
   @Override
   public String toString() {
-    return TextFormat.shortDebugString(getProto());
+    StringBuilder sb = new StringBuilder();
+    sb.append("[").append(getContainerId()).append(", ")
+        .append("CreateTime: ").append(getCreationTime()).append(", ")
+        .append("State: ").append(getContainerState()).append(", ")
+        .append("Capability: ").append(getAllocatedResource()).append(", ")
+        .append("Diagnostics: ").append(getDiagnostics()).append(", ")
+        .append("ExitStatus: ").append(getContainerExitStatus()).append(", ")
+        .append("Priority: ").append(getPriority())
+        .append("]");
+    return sb.toString();
   }
 
   @Override