Kihwal Lee created HADOOP-9436: ---------------------------------- Summary: NetgroupCache does not refresh membership correctly Key: HADOOP-9436 URL: https://issues.apache.org/jira/browse/HADOOP-9436 Project: Hadoop Common Issue Type: Bug Affects Versions: 2.0.3-alpha, 3.0.0, 0.23.7 Reporter: Kihwal Lee
NetgroupCache is used to get around the problem of inability to obtain a single user-to-groups mapping from netgroup. For example, the ACL code pre-populates this cache, so that any user-group mapping can be resolved for all groups defined in the service. However, the current refresh code only adds users to existing groups, so a loss of group membership won't take effect. This is because the internal user-groups mapping cache is never invalidated. If this is simply invalidated on clear(), the cache entries will build up correctly, but user-group resolution may fail during refresh, resulting in incorrectly denying accesses. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira