[
https://issues.apache.org/jira/browse/AMBARI-3677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814310#comment-13814310
]
Tom Beerbower commented on AMBARI-3677:
---------------------------------------
The default calculation for service state is :
{code}
if all master components are STARTED OR MAINTENANCE then
service state = STARTED
else
service state = master component state
{code}
The calculation for HDFS service state is :
{code}
if all master components are STARTED OR MAINTENANCE OR
((NameNodeCount > 0 AND !SecondaryNameNodeExists OR JournalNodeExists) AND
ActiveNameNodeCount > 0))
service state = STARTED
else if any master components is UNKNOWN
service state = UNKNOWN
else if any master components is STARTING
service state = STARTING
else
service state = INSTALLED // stopped
{code}
The calculation for HBASE service state is :
{code}
if all master components are STARTED OR MAINTENANCE OR
(ActiveHBaseMasterCount > 0) // at least one active HBASE_MASTER
service state = STARTED
else if any master components is UNKNOWN
service state = UNKNOWN
else if any master components is STARTING
service state = STARTING
else
service state = INSTALLED // stopped
{code}
> Service state should accurately reflect state of host-components
> ----------------------------------------------------------------
>
> Key: AMBARI-3677
> URL: https://issues.apache.org/jira/browse/AMBARI-3677
> Project: Ambari
> Issue Type: Task
> Reporter: Tom Beerbower
> Assignee: Tom Beerbower
> Attachments: AMBARI-3677.patch
>
>
> Currently the UI loads *all* the host-components for a service just to
> calculate the status of a service. So if YARN, HDFS are installed on a 1000
> node cluster, we get 2000 host-components in response just to calculate the
> color of 2 services (stopped=red, started=green, starting=blinking-green,
> stopping=blinking-red, etc., unknown=yellow)
> This is not scalable on the browser. We want the API to roll-up the
> host-component statuses, and correctly update the {{ServiceInfo/state}} of
> the service. This will help UI in not loading all host_components.
--
This message was sent by Atlassian JIRA
(v6.1#6144)
