YARN-5991. Yarn Distributed Shell does not print throwable t to App Master When failed to start container

(Contributed by Jim Frankola via Daniel Templeton)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/main/java/org/apache/hadoop/yarn/applications/distributedshell/ApplicationMaster.java

@@ -1001,7 +1001,7 @@ public class ApplicationMaster {
 
     @Override
     public void onStartContainerError(ContainerId containerId, Throwable t) {
-      LOG.error("Failed to start Container " + containerId);
+      LOG.error("Failed to start Container " + containerId, t);
       containers.remove(containerId);
       applicationMaster.numCompletedContainers.incrementAndGet();
       applicationMaster.numFailedContainers.incrementAndGet();