PIG-4951: Rename PIG_ATS_ENABLED constant

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1763640 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/CHANGES.txt b/CHANGES.txt
index b711d6b..6193c9d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -48,6 +48,8 @@
  
 BUG FIXES
 
+PIG-4951: Rename PIG_ATS_ENABLED constant (szita via daijy)
+
 PIG-3087: Refactor TestLogicalPlanBuilder to be meaningful (szita via daijy)
 
 PIG-4976: streaming job with store clause stuck if the script fail (daijy via knoguchi)
diff --git a/src/org/apache/pig/PigConfiguration.java b/src/org/apache/pig/PigConfiguration.java
index a5e7ed6..36adb2c 100644
--- a/src/org/apache/pig/PigConfiguration.java
+++ b/src/org/apache/pig/PigConfiguration.java
@@ -427,15 +427,25 @@
     /**
      * Log tracing id that can be used by upstream clients for tracking respective logs
      */
-    public static final String CALLER_ID = "pig.log.trace.id";
+    public static final String PIG_LOG_TRACE_ID = "pig.log.trace.id";
+
+    /**
+     * @deprecated use {@link #PIG_LOG_TRACE_ID} instead. Will be removed in Pig 0.18
+     */
+    public static final String CALLER_ID = PIG_LOG_TRACE_ID;
 
     /**
      * Enable ATS for Pig
      */
-    public static final String ENABLE_ATS = "pig.ats.enabled";
+    public static final String PIG_ATS_ENABLED = "pig.ats.enabled";
 
     /**
-     * Enable ATS for Pig
+     * @deprecated use {@link #PIG_ATS_ENABLED} instead. Will be removed in Pig 0.18
+     */
+    public static final String ENABLE_ATS = PIG_ATS_ENABLED;
+
+    /**
+     * If set, Pig will override tez.am.launch.cmd-opts and tez.am.resource.memory.mb to optimal
      */
     public static final String PIG_TEZ_CONFIGURE_AM_MEMORY = "pig.tez.configure.am.memory";
 
diff --git a/src/org/apache/pig/PigServer.java b/src/org/apache/pig/PigServer.java
index 6500d9c..fe09d2f 100644
--- a/src/org/apache/pig/PigServer.java
+++ b/src/org/apache/pig/PigServer.java
@@ -246,13 +246,13 @@
 
         // log ATS event includes the caller context
         String auditId = PigATSClient.getPigAuditId(pigContext);
-        String callerId = (String)pigContext.getProperties().get(PigConfiguration.CALLER_ID);
+        String callerId = (String)pigContext.getProperties().get(PigConfiguration.PIG_LOG_TRACE_ID);
         log.info("Pig Script ID for the session: " + auditId);
         if (callerId != null) {
             log.info("Caller ID for session: " + callerId);
         }
         if (Boolean.parseBoolean(pigContext.getProperties()
-                .getProperty(PigConfiguration.ENABLE_ATS))) {
+                .getProperty(PigConfiguration.PIG_ATS_ENABLED))) {
             if (Boolean.parseBoolean(pigContext.getProperties()
                     .getProperty("yarn.timeline-service.enabled", "false"))) {
                 PigATSClient.ATSEvent event = new PigATSClient.ATSEvent(auditId, callerId);