Github user sudheeshkatkam commented on a diff in the pull request:

    https://github.com/apache/drill/pull/482#discussion_r84972014
  
    --- Diff: 
exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/DrillRoot.java 
---
    @@ -55,44 +59,89 @@ public Viewable getStats() {
       @GET
       @Path("/stats.json")
       @Produces(MediaType.APPLICATION_JSON)
    -  public List<Stat> getStatsJSON() {
    -    List<Stat> stats = Lists.newLinkedList();
    -    stats.add(new Stat("Number of Drill Bits", 
work.getContext().getBits().size()));
    -    int number = 0;
    -    for (CoordinationProtos.DrillbitEndpoint bit : 
work.getContext().getBits()) {
    -      String initialized = bit.isInitialized() ? " initialized" : " not 
initialized";
    -      stats.add(new Stat("Bit #" + number, bit.getAddress() + 
initialized));
    -      ++number;
    +  public Stats getStatsJSON() {
    +    final String version = 
work.getContext().getOptionManager().getOption(ExecConstants.CLUSTER_VERSION).string_val;
    --- End diff --
    
    `final String version = 
work.getContext().getOptionManager().getOption(ExecConstants.CLUSTER_VERSION_VALIDATOR);`


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