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https://issues.apache.org/jira/browse/HADOOP-7156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003453#comment-13003453
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Allen Wittenauer commented on HADOOP-7156:
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If someone wants to use non-conforming software, that is their problem, not
ours. I'd much rather shame a company into fixing it than pretending that
everything is a-ok. Yes, I realize that is idealistic.
In the case of RHEL 6, it is what? 2 months old? Like any .0, it is going to
have growing pains during its first few months that should get fixed by the
vendor. As for VAS, I'm not really sure I care.
In the case of #1, what is the point of mutexes around a thread-safe function?
Why not just call the unsafe one and avoid the extra performance hit on
machines that follow POSIX?
In the case of #3, I'll be OK with this if we also add a huge warning in the
task log telling the user that their system isn't POSIX compliant and to call
their vendor to get it fixed. :p
> 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
>
> Attachments: hadoop-7156.txt
>
>
> 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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