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https://issues.apache.org/jira/browse/HADOOP-8852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla updated HADOOP-8852:
-------------------------------------
Description:
Parent JIRA to track the work of removing delegation tokens from these
filesystems.
This JIRA has evolved from the initial issue of these filesystems not stopping
the DelegationTokenRenewer thread they were creating.
After further investigation, Daryn pointed out - "If you can get a token, you
don't need a token"! Hence, these filesystems shouldn't use delegation tokens.
Evolution of the JIRA is listed below:
Update 2:
DelegationTokenRenewer is not required. The filesystems that are using it
already have Krb tickets and do not need tokens. Remove DelegationTokenRenewer
and all the related logic from WebHdfs and Hftp filesystems.
Update1:
DelegationTokenRenewer should be Singleton - the instance and renewer threads
should be created/started lazily. The filesystems using the renewer shouldn't
need to explicity start/stop the renewer, and only register/de-register for
token renewal.
Initial issue:
HftpFileSystem and WebHdfsFileSystem should stop the DelegationTokenRenewer
thread when they are closed.
was:
Update 2:
DelegationTokenRenewer is not required. The filesystems that are using it
already have Krb tickets and do not need tokens. Remove DelegationTokenRenewer
and all the related logic from WebHdfs and Hftp filesystems.
Update1:
DelegationTokenRenewer should be Singleton - the instance and renewer threads
should be created/started lazily. The filesystems using the renewer shouldn't
need to explicity start/stop the renewer, and only register/de-register for
token renewal.
Original issue:
HftpFileSystem and WebHdfsFileSystem should stop the DelegationTokenRenewer
thread when they are closed.
Issue Type: Improvement (was: Bug)
Summary: WebHdfsFileSystem and HftpFileSystem don't need delegation
tokens (was: Remove DelegationTokenRenewer)
> WebHdfsFileSystem and HftpFileSystem don't need delegation tokens
> -----------------------------------------------------------------
>
> Key: HADOOP-8852
> URL: https://issues.apache.org/jira/browse/HADOOP-8852
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.0.0-alpha
> Reporter: Tom White
> Assignee: Karthik Kambatla
> Attachments: hadoop-8852.patch, hadoop-8852.patch,
> hadoop-8852-v1.patch
>
>
> Parent JIRA to track the work of removing delegation tokens from these
> filesystems.
> This JIRA has evolved from the initial issue of these filesystems not
> stopping the DelegationTokenRenewer thread they were creating.
> After further investigation, Daryn pointed out - "If you can get a token, you
> don't need a token"! Hence, these filesystems shouldn't use delegation tokens.
> Evolution of the JIRA is listed below:
> Update 2:
> DelegationTokenRenewer is not required. The filesystems that are using it
> already have Krb tickets and do not need tokens. Remove
> DelegationTokenRenewer and all the related logic from WebHdfs and Hftp
> filesystems.
> Update1:
> DelegationTokenRenewer should be Singleton - the instance and renewer threads
> should be created/started lazily. The filesystems using the renewer shouldn't
> need to explicity start/stop the renewer, and only register/de-register for
> token renewal.
> Initial issue:
> HftpFileSystem and WebHdfsFileSystem should stop the DelegationTokenRenewer
> thread when they are closed.
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