Kihwal Lee created HADOOP-10442:
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Summary: Group look-up can cause segmentation fault when certain
JNI-based mapping module is used.
Key: HADOOP-10442
URL: https://issues.apache.org/jira/browse/HADOOP-10442
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 2.3.0, 2.4.0
Reporter: Kihwal Lee
Priority: Blocker
When JniBasedUnixGroupsNetgroupMapping or JniBasedUnixGroupsMapping is used, we
get segmentation fault very often. The same system ran 2.2 for months without
any problem, but as soon as upgrading to 2.3, it started crashing. This
resulted in multiple name node crashes per day.
The server was running nslcd (nss-pam-ldapd-0.7.5-15.el6_3.2). We did not see
this problem on the servers running sssd.
There was one change in the C code and it modified the return code handling
after getgrouplist() call. If the function returns 0 or a negative value less
than -1, it will do realloc() instead of returning failure.
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