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  1. Hadoop Common
  2. HADOOP-10442

Group look-up can cause segmentation fault when certain JNI-based mapping module is used.

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Details

    • Bug
    • Status: Closed
    • Blocker
    • Resolution: Fixed
    • 2.3.0, 2.4.0
    • 2.4.0
    • None
    • None
    • Reviewed

    Description

      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.

      Attachments

        1. HADOOP-10442.patch
          0.8 kB
          Kihwal Lee

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            kihwal Kihwal Lee
            kihwal Kihwal Lee
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