Specify this change as twitter specific in comments.

twitter-forks · Jan 26, 2019 · c87e185 · c87e185
1 parent 77bcade
commit c87e185
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/ql/src/java/org/apache/hadoop/hive/ql/exec/mr/MapredLocalTask.java b/ql/src/java/org/apache/hadoop/hive/ql/exec/mr/MapredLocalTask.java
@@ -255,7 +255,10 @@ public int executeInChildVM(DriverContext driverContext) {
       // }
 
       //Clear system property HADOOP_USER_NAME for child process, to avoid exception
-      // raised for HADOOP_USER_NAME_UNSUPPORTED
+      // raised for HADOOP_USER_NAME_UNSUPPORTED. This is to adapt to a specific change on Hadoop
+      // cluster at Twitter, where login method of using HADOOP_USER_NAME through environment
+      // variable or system property is disabled. Non-null values of HADOOP_USER_NAME would raise
+      // exception.
       // This will be used by hadoop only in unsecure(/non kerberos) mode
       System.clearProperty("HADOOP_USER_NAME");