[jira] [Created] (DRILL-490) Possible nulls as keys and values while calculating affinity.

["Bhallamudi Venkata Siva Kamesh (JIRA)" <ji...@apache.org>]

Bhallamudi Venkata Siva Kamesh created DRILL-490:
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             Summary: Possible nulls as keys and values while calculating affinity.
                 Key: DRILL-490
                 URL: https://issues.apache.org/jira/browse/DRILL-490
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.0.0-milestone-1
            Reporter: Bhallamudi Venkata Siva Kamesh


{code:title=HBaseGroupScan.java|borderStyle=solid}
for (ServerName sn : regionsMap.values()) {
      String host = sn.getHostname();
      DrillbitEndpoint ep = endpointMap.get(host);
      EndpointAffinity affinity = affinityMap.get(ep);
      if (affinity == null) {
        affinityMap.put(ep, new EndpointAffinity(ep, 1));
      } else {
        affinity.addAffinity(1);
      }
}
{code}

I think, from the above code if drill bits are not running nodes where regions are present, we get *ep* as null. Because of this, affinity map contains *null* as key and new EndpointAffinity(*null*, 1) as value. This causes NPE at Wrapper.addEndpointAffinity.



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