mayankkunwar commented on code in PR #4758:
URL: https://github.com/apache/hive/pull/4758#discussion_r1361522245


##########
common/src/test/org/apache/hadoop/hive/conf/TestHiveConf.java:
##########
@@ -95,6 +97,142 @@ public void testConfProperties() throws Exception {
 
     // Test HiveConf property variable substitution in hive-site.xml
     checkHiveConf("test.var.hiveconf.property", 
ConfVars.DEFAULTPARTITIONNAME.getDefaultValue());
+
+    // Test if all the LLAP conf vars are defined in LLAP daemon conf vars
+    Set<String> llapConfSet = getLLAPConfVars();
+    for (String varName : llapConfSet) {
+      Assert.assertTrue(HiveConf.getLlapDaemonConfVars().contains(varName));
+    }
+  }
+
+  private Set<String> getLLAPConfVars() {
+    Set<String> llapVarsExclusionSet = getLLAPVarsExclusionSet();
+    Set<String> llapConfSet = new HashSet<>();
+    for(ConfVars var: ConfVars.values()) {
+      if (var.name().startsWith("LLAP_") && 
!llapVarsExclusionSet.contains(var.varname)) {
+        llapConfSet.add(var.varname);
+      }
+    }
+    return llapConfSet;
+  }
+
+  /**
+   * Add those conf vars to this exclusion set which are not part of LLAP 
Daemon Conf vars
+   */
+  private Set<String> getLLAPVarsExclusionSet() {

Review Comment:
   llapDaemonVarsSetLocal is used here 
https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/cli/service/LlapServiceDriver.java#L288
 and LLAP_IO_ is set as part of this line 
https://github.com/apache/hive/blob/master/llap-server/src/java/org/apache/hadoop/hive/llap/cli/service/LlapServiceDriver.java#L291
   
   This seems to be confusing.



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