[HADOOP-9049] DelegationTokenRenewer needs to be Singleton and FileSystems should register/deregister to/from.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.2-alpha
• Fix Version/s: 2.0.3-alpha
• Component/s: security
• Hadoop Flags: Reviewed
• Assignee: Karthik Kambatla
• Reporter: Karthik Kambatla
• Created: 16/Nov/12 00:05
• Updated: 03/Nov/14 21:33
• Resolved: 21/Nov/12 16:39

Description

Currently, DelegationTokenRenewer is not singleton.

Each filesystem using it spawns its own DelegationTokenRenewer. Also, they don't stop the Renewer leading to other problems.

A single DelegationTokenRenewer should be sufficient for all FileSystems.

Issue Links

• is depended upon by: HADOOP-9064 Augment DelegationTokenRenewer API to cancel the tokens on calls to removeRenewAction
• is related to: HDFS-4009 WebHdfsFileSystem and HftpFileSystem don't need delegation tokens
• relates to: HADOOP-9549 WebHdfsFileSystem hangs on close()