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From "Warren Falk (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENENET-593) NullReferenceException in Linux
Date Thu, 10 Aug 2017 12:37:00 GMT
Warren Falk created LUCENENET-593:
-------------------------------------

             Summary: NullReferenceException in Linux
                 Key: LUCENENET-593
                 URL: https://issues.apache.org/jira/browse/LUCENENET-593
             Project: Lucene.Net
          Issue Type: Bug
          Components: Lucene.Net Core
    Affects Versions: Lucene.Net 4.8.0, Lucene.Net 5.0 PCL
         Environment: Linux (ubuntu 64 bit, maybe all linux variants)
            Reporter: Warren Falk


A NullReferenceException on any attempt to query in Linux (ubuntu x64 in my tests)

I was able to track this down to the following line in Constants.cs

        {{public static readonly string OS_ARCH = GetEnvironmentVariable("PROCESSOR_ARCHITECTURE",
"x86");}}

Sure enough, PROCESSOR_ARCHITECTURE is not set by default in ubuntu server x64 and when I
set it, there is no failure.

I would fix this, but I'm not sure what this value is used for, so I am not sure what the
appropriate behavior should be.  Should we try to find the correct architecture here?  And
what is the correct string, "amd64", "x64", "x86_64"?  Or do we really just want to know the
value of that if it is actually not set, should we leave it blank?  The issue is that the
InfoWriter can't write a null, but it could write an empty string.

I'll submit a pull request if anyone can tell me what correct behavior should be.



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