MAPREDUCE-2376. test-task-controller fails if run as a userid < 1000. Contributed by Todd Lipcon

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security@1206667 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -49,6 +49,9 @@ Release 0.20.206.0 - unreleased
     MAPREDUCE-2905. Fix fair scheduler to prevent clumping of tasks when
     assignmultiple is enabled. (todd)
 
+    MAPREDUCE-2376. test-task-controller fails if run as a userid < 1000.
+    (todd via eli)
+
   IMPROVEMENTS
 
     MAPREDUCE-3008. [Gridmix] Improve cumulative CPU usage emulation for 

src/c++/task-controller/test/test-task-controller.c

@@ -795,7 +795,7 @@ int main(int argc, char **argv) {
 
   if (getuid() == 0 && argc == 2) {
     username = argv[1];
-  } else {
+  } else if ((username = getenv("TC_TEST_USERNAME")) == NULL) {
     username = strdup(getpwuid(getuid())->pw_name);
     my_username = 1;
   }