fapifta opened a new pull request #1456: URL: https://github.com/apache/hadoop-ozone/pull/1456
## What changes were proposed in this pull request? Server side implementation of the finalization logic is implemented in this pull request. The initial idea in the client side implementation is to issue an initiating request, then monitor the process with client side polling. This is reflected in the server side code, but due to complications, in the server side, the background finalization of layoutfeatures one by one, is postponed and tracked in HDDS-4286. The problem with the backround finalization is that it has to be synced between the OMs, and we need to ensure that once requests are in the state machine for finalizing a layout feature, the requests processed by the master before the finalization requests, and after the finalization requests are in sync and in order. This means that we need to post separate requests into the state machine internally on the leader OM, to have a flow, where the a specific request type or change to a request handling, once its activated, it is on all OMs activated at the same transaction. We do not really have such a logic for now, and it requires some further review. I will post a design doc on this one into HDDS-4286 in the near future about possible solutions. With that, in this patch, the finalization of the features is happening inside the initiating UpgradeFinalizeRequest RPC call handling, and it has to finish on at least two OMs. So we process the finalization inside the statemachine in one batch. After this, the client gets a STARTING_FINALIZATION status back, and after the 500ms delay on the client side, the client will grab the results. ## What is the link to the Apache JIRA https://issues.apache.org/jira/browse/HDDS-4172 ## How was this patch tested? Quick manual test for the very basic workflow so far. JUnit tests to be added to the PR, but wanted to share to have reviews on the approach while I am working on the tests. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: ozone-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: ozone-issues-h...@hadoop.apache.org
