Kihwal Lee created HADOOP-10442: ----------------------------------- 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. -- This message was sent by Atlassian JIRA (v6.2#6252)