hiwangzhihui commented on code in PR #6234:
URL: https://github.com/apache/hadoop/pull/6234#discussion_r1378404598


##########
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java:
##########
@@ -1849,8 +1849,8 @@ protected Subject getSubject() {
   @InterfaceStability.Evolving
   public <T> T doAs(PrivilegedAction<T> action) {
     if (LOG.isDebugEnabled()) {
-      LOG.debug("PrivilegedAction [as: {}][action: {}]", this, action,
-          new Exception());
+      LOG.debug("PrivilegedAction [as: {}][action: {}][from: {}]", this, 
action,
+              Thread.currentThread().getStackTrace()[2]);

Review Comment:
   @goiri  Can you help us make the decision? 



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