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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-7156) getpwuid_r is not thread-safe on RHEL6
Date Fri, 25 Feb 2011 09:23:38 GMT
getpwuid_r is not thread-safe on RHEL6
--------------------------------------

                 Key: HADOOP-7156
                 URL: https://issues.apache.org/jira/browse/HADOOP-7156
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 0.22.0
         Environment: RHEL 6.0 "Santiago"
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical
             Fix For: 0.22.0


Due to the following bug in SSSD, functions like getpwuid_r are not thread-safe in RHEL 6.0
if sssd is specified in /etc/nsswitch.conf (as it is by default):

https://fedorahosted.org/sssd/ticket/640

This causes many fetch failures in the case that the native libraries are available, since
the SecureIO functions call getpwuid_r as part of fstat. By enabling -Xcheck:jni I get the
following trace on JVM crash:

*** glibc detected *** /mnt/toolchain/JDK6u20-64bit/bin/java: free(): invalid pointer: 0x0000003575741d23
***
======= Backtrace: =========
/lib64/libc.so.6[0x3575675676]
/lib64/libnss_sss.so.2(_nss_sss_getpwuid_r+0x11b)[0x7fe716cb42cb]
/lib64/libc.so.6(getpwuid_r+0xdd)[0x35756a5dfd]


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