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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8901) GZip and Snappy support may not work without unversioned libraries
Date Tue, 09 Oct 2012 00:14:03 GMT
Colin Patrick McCabe created HADOOP-8901:
--------------------------------------------

             Summary: GZip and Snappy support may not work without unversioned libraries
                 Key: HADOOP-8901
                 URL: https://issues.apache.org/jira/browse/HADOOP-8901
             Project: Hadoop Common
          Issue Type: Bug
          Components: native
    Affects Versions: 2.0.3-alpha
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe
            Priority: Minor
         Attachments: HADOOP-8901.001.patch

Currently, we use {{dlopen}} to open {{libz.so}} and {{libsnappy.so}}, to get Gzip and Snappy
support, respectively.

However, this is not correct; we should be dlopening {{libsnappy.so.1}} instead.  The versionless
form of the shared library is not commonly installed except by development packages.  Also,
we may run into subtle compatibility problems if a new version of libsnappy comes out.

For libz, I believe we should simply link normally against it, rather than loading it using
{{dlopen}}.  It is part of the base Linux install for every distribution I'm aware of, so
let's not overcomplicate things.

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