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Posted to common-dev@hadoop.apache.org by "David Villegas (JIRA)" <ji...@apache.org> on 2014/08/12 21:52:12 UTC

[jira] [Created] (HADOOP-10962) Flags for posix_fadvise are not valid in some architectures

David Villegas created HADOOP-10962:
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             Summary: Flags for posix_fadvise are not valid in some architectures
                 Key: HADOOP-10962
                 URL: https://issues.apache.org/jira/browse/HADOOP-10962
             Project: Hadoop Common
          Issue Type: Bug
          Components: native
    Affects Versions: 2.4.1
         Environment: System z/Linux
            Reporter: David Villegas


In org.apache.hadoop.io.nativeio.NativeIO.java, the posix_fadvise flag parameter is hardcoded to the most common values in fcntl.h.

However, not all architectures use the same values (in this case, System z/Linux) A better approach would be to not make assumptions about fcntl.h values (or any other system constants).

This bug results in calls to posix_fadvise failing in zLinux.



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