Kihwal Lee created HADOOP-10522:
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Summary: JniBasedUnixGroupMapping mishandles errors
Key: HADOOP-10522
URL: https://issues.apache.org/jira/browse/HADOOP-10522
Project: Hadoop Common
Issue Type: Bug
Reporter: Kihwal Lee
Priority: Critical
The mishandling of errors in the jni user-to-groups mapping modules can cause
segmentation faults in subsequent calls. Here are the bugs:
1) If {{hadoop_user_info_fetch()}} returns an error code that is not ENOENT,
the error may not be handled at all. This bug was found by [~cnauroth].
2) In {{hadoop_user_info_fetch()}} and {{hadoop_group_info_fetch()}}, the
global {{errno}} is directly used. This is not thread-safe and could be the
cause of some failures that disappeared after enabling the big lookup lock.
3) In the above methods, there is no limit on retries.
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