[HBASE-24365] MetricsTableWrapperAggregateImpl runnable fails due to exception and never runs

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-1, 2.1.9, 2.2.4
• Fix Version/s: 3.0.0-alpha-1, 2.3.0, 2.2.5
• Component/s: metrics
• Hadoop Flags: Reviewed
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 13/May/20 14:45
• Updated: 19/May/20 14:06
• Resolved: 18/May/20 09:57

Description

MetricsTableWrapperAggregateImpl has a thread that periodically updates the values.
It seems that once the region server is online and the meta is assigned if there are no store files the Optional values here

            mt.maxStoreFileAge = Math.max(mt.maxStoreFileAge, store.getMaxStoreFileAge().getAsLong());
            mt.minStoreFileAge = Math.min(mt.minStoreFileAge, store.getMinStoreFileAge().getAsLong());

is not available and thus throwing NoSuchElementException and the thread dies. It never updates the values till the RS is alive.

Issue Links

• links to: PR