YARN-8185. Improve log in DirectoryCollection constructor. (Yufei Gu via Haibo Chen)

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

@@ -181,11 +181,10 @@ public class DirectoryCollection {
       long utilizationSpaceCutOff) {
     conf = new YarnConfiguration();
     try {
-      diskValidator = DiskValidatorFactory.getInstance(
-          conf.get(YarnConfiguration.DISK_VALIDATOR,
-              YarnConfiguration.DEFAULT_DISK_VALIDATOR));
-      LOG.info("Disk Validator: " + YarnConfiguration.DISK_VALIDATOR +
-          " is loaded.");
+      String diskValidatorName = conf.get(YarnConfiguration.DISK_VALIDATOR,
+          YarnConfiguration.DEFAULT_DISK_VALIDATOR);
+      diskValidator = DiskValidatorFactory.getInstance(diskValidatorName);
+      LOG.info("Disk Validator '" + diskValidatorName + "' is loaded.");
     } catch (Exception e) {
       throw new YarnRuntimeException(e);
     }