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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