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https://issues.apache.org/jira/browse/AMBARI-25302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akhil S Naik updated AMBARI-25302:
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Labels: migration (was: )
> Migrate Ambari Metrics Data On Ambari Major Upgrade to ambari-2.7.x is
> Migrating on 1 months data
> -------------------------------------------------------------------------------------------------
>
> Key: AMBARI-25302
> URL: https://issues.apache.org/jira/browse/AMBARI-25302
> Project: Ambari
> Issue Type: Bug
> Components: ambari-metrics
> Affects Versions: 2.7.3
> Reporter: Akhil S Naik
> Assignee: Akhil S Naik
> Priority: Major
> Labels: migration
>
> I am upgrading from ambari-2.6.x to ambari-3.1.x (HDF3.1 to HDF - 3.3.1)
> after upgrade of HDF and ambari, I follow the command to Migrate the Ambari
> metrics data:
> {code:java}
> /usr/sbin/ambari-metrics-collector --config
> /etc/ambari-metrics-collector/conf/
> upgrade_start /etc/ambari-metrics-collector/conf/metrics_whitelist
> {code}
> Now after migration i can see only last 30 days data , all the Metrics data
> prior to 30 days is lost.
> *Analysis* :
> Upon checking the code :
> https://github.com/apache/ambari/blob/release-2.7.3/ambari-metrics/ambari-metrics-timelineservice/src/main/java/org/apache/ambari/metrics/core/timeline/upgrade/core/MetricsDataMigrationLauncher.java#L285
> I found the Class MetricsDataMigrationLauncher.java Actually needs
> `startTime` as an argument which is the StartTime from which the migration
> need to be done, but we are not giving that anywhere in the code :
> https://github.com/apache/ambari-metrics/blob/dfaf6a4fcb78a6c0516a769b2fbe9cf449400ee2/ambari-metrics-timelineservice/conf/unix/ambari-metrics-collector#L333
> also we are having the Default value of start time as 1 month :
> https://github.com/apache/ambari/blob/release-2.7.3/ambari-metrics/ambari-metrics-timelineservice/src/main/java/org/apache/ambari/metrics/core/timeline/upgrade/core/MetricsDataMigrationLauncher.java#L72
> {code:java}
> public static final long DEFAULT_START_TIME = System.currentTimeMillis() -
> ONE_MONTH_MILLIS; //Last month
> {code}
> so inshort we are only migrating last one months data , but no where in docs
> we have mentioned that and it caused Data loss to Customer.
> reference :
> https://docs.hortonworks.com/HDPDocuments/HDF3/HDF-3.3.1/ambari-managed-hdf-upgrade/content/hdf-migrate-ambari-metrics-data.html
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