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https://issues.apache.org/jira/browse/AMBARI-12850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Hurley resolved AMBARI-12850.
--------------------------------------
Resolution: Fixed
> Downgrades That Are Retried With Unhealthy Hosts Can Produce Multiple Stages
> In Progress
> ----------------------------------------------------------------------------------------
>
> Key: AMBARI-12850
> URL: https://issues.apache.org/jira/browse/AMBARI-12850
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.1.0
> Reporter: Jonathan Hurley
> Assignee: Jonathan Hurley
> Priority: Critical
> Fix For: 2.1.2
>
> Attachments: AMBARI-12850.patch
>
>
> When performing a downgrade from HDP 2.3 to HDP 2.2, the web client can
> sometimes not show the Retry button in the event of a failure. The problem
> stems from two issues:
> - When retrying a stage with hosts not heartbeating, the entire stage is
> automatically aborted
> - Task updates in stages is done in a non-atomic manner.
> {code:java}
> {
> "Upgrade" : {
> "cluster_name" : "c1",
> "request_id" : 21
> },
> "upgrade_groups" : [
> {
> "UpgradeGroup" : {
> "completed_task_count" : 2,
> "group_id" : 22,
> "in_progress_task_count" : 0,
> "name" : "CORE_SLAVES",
> "progress_percent" : 100.0,
> "request_id" : 21,
> "status" : "COMPLETED",
> "title" : "Core Slaves",
> "total_task_count" : 2
> }
> },
> {
> "UpgradeGroup" : {
> "completed_task_count" : 5,
> "group_id" : 23,
> "in_progress_task_count" : 3,
> "name" : "CORE_MASTER",
> "progress_percent" : 81.42857142857143,
> "request_id" : 21,
> "status" : "HOLDING_FAILED",
> "title" : "Core Masters",
> "total_task_count" : 8
> }
> },
> {
> "UpgradeGroup" : {
> "completed_task_count" : 2,
> "group_id" : 24,
> "in_progress_task_count" : 1,
> "name" : "ZOOKEEPER",
> "progress_percent" : 66.66666666666666,
> "request_id" : 21,
> "status" : "IN_PROGRESS",
> "title" : "ZooKeeper",
> "total_task_count" : 3
> }
> },
> {
> "UpgradeGroup" : {
> "completed_task_count" : 5,
> "group_id" : 25,
> "in_progress_task_count" : 0,
> "name" : "POST_CLUSTER",
> "progress_percent" : 100.0,
> "request_id" : 21,
> "status" : "COMPLETED",
> "title" : "Finalize Downgrade",
> "total_task_count" : 5
> }
> }
> ]
> }
> {code}
> Since we have upgrade group in IN_PROGRESS state, and no upgrade items in
> IN_PROGRESS state, following situation happened. After upgrade failed, all
> IN_PROGRESS groups, items should be transitioned into ABORTED state, so this
> is BE issue in order to avoid such a collision.
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