hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-7172) SecureIO should not check owner on non-secure clusters that have no native support
Date Tue, 08 Mar 2011 06:56:59 GMT
SecureIO should not check owner on non-secure clusters that have no native support
----------------------------------------------------------------------------------

                 Key: HADOOP-7172
                 URL: https://issues.apache.org/jira/browse/HADOOP-7172
             Project: Hadoop Common
          Issue Type: Bug
          Components: io, security
    Affects Versions: 0.22.0
            Reporter: Todd Lipcon
            Priority: Critical
             Fix For: 0.22.0


The SecureIOUtils.openForRead function currently uses a racy stat/open combo if security is
disabled and the native libraries are not available. This ends up shelling out to "ls -ld"
which is very very slow. We've seen this cause significant performance regressions on clusters
that match this profile.

Since the racy permissions check doesn't buy us any security anyway, we should just fall back
to a normal "open" without any stat() at all, if we can't use the native support to do it
efficiently.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message