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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (DRILL-490) Possible nulls as keys and values while calculating affinity.
Date Mon, 09 Jun 2014 06:49:15 GMT

     [ https://issues.apache.org/jira/browse/DRILL-490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jacques Nadeau resolved DRILL-490.
----------------------------------

    Resolution: Fixed

> 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
>         Attachments: DRILL-490.patch
>
>
> {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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