[
https://issues.apache.org/jira/browse/HDDS-17140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18129064#comment-18129064
]
Stephen O'Donnell commented on HDDS-17140:
------------------------------------------
By "refreshing on demand after a 10-minute cache expiry" do you mean the cache
expires and does not refresh until something tries to retrieve the value. Then
it retrieves the value from the server, holding up the original caller for a
small interval?
I think that approach makes sense and it could cut down excess polling by
clients that are doing nothing.
I think your suggested scope makes sense.
> S3 Gateway does not pick up the new OM version after ZDU finalization
> ----------------------------------------------------------------------
>
> Key: HDDS-17140
> URL: https://issues.apache.org/jira/browse/HDDS-17140
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Chung-En Lee
> Assignee: Andy Huang
> Priority: Major
>
> The ZDU design doc ("Order of Operations During the Upgrade", step 5) says to
> rolling-restart S3 Gateway and other client processes on the new software
> before the cluster is finalized. At that point OM is still pre-finalized, so
> it reports the old version to clients.
> S3 Gateway learns the OM version only once, when it handles its first request
> after starting, and keeps it for the life of the process. In a ZDU rolling
> restart S3 Gateway keeps serving traffic, so it captures the old version
> before finalization. After the admin finalizes the cluster, OM reports the
> new version, but S3 Gateway keeps the old one. Any new feature that depends
> on the finalized OM version stays disabled in S3 Gateway until it is
> restarted again.
> Proposed fix (options):
> 1. Change the documented upgrade order so S3 Gateway is restarted after
> finalization.
> 2. Keep the current order, and document that S3 Gateway must be restarted
> again after finalization.
> 3. Make S3 Gateway aware OM version changes (e.g. after finalization) and
> re-initialize its OzoneClient automatically, so it picks up the latest OM
> version without a manual restart.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
