[ https://issues.apache.org/jira/browse/HADOOP-9436?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer updated HADOOP-9436: ------------------------------------- Status: Open (was: Patch Available) Cancelling patch, as it no longer applies. > 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: 0.23.7, 2.0.3-alpha, 3.0.0 > Reporter: Kihwal Lee > Assignee: Kihwal Lee > Attachments: HADOOP-9436.patch > > > 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 was sent by Atlassian JIRA (v6.3.4#6332)