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Aaron T. Myers commented on HDFS-3608: -------------------------------------- I wasn't saying that we definitely shouldn't use inotify, just that using inotify is not the goal of the JIRA. The goal of the JIRA is to make fuse_dfs not cache Filesystem instances longer than it should. One potential implementation is to use inotify. Thus, we should update the summary/description of the JIRA. > fuse_dfs: use inotify to detect changes in UID ticket cache > ----------------------------------------------------------- > > Key: HDFS-3608 > URL: https://issues.apache.org/jira/browse/HDFS-3608 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 2.0.1-alpha > Reporter: Colin Patrick McCabe > Assignee: Colin Patrick McCabe > Priority: Minor > > Currently in fuse_dfs, if one kinits as some principal "foo" and then does > some operation on fuse_dfs, then kdestroy and kinit as some principal "bar", > subsequent operations done via fuse_dfs will still use cached credentials for > "foo". The reason for this is that fuse_dfs caches Filesystem instances using > the UID of the user running the command as the key into the cache. This is a > very uncommon scenario, since it's pretty uncommon for a single user to want > to use credentials for several different principals on the same box. > However, we can use inotify to detect changes in the Kerberos ticket cache > file and force the next operation to create a new FileSystem instance in that > case. This will also require a reference counting mechanism in fuse_dfs so > that we can free the FileSystem classes when they refer to previous Kerberos > ticket caches. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira