[IGNITE-13770] Ignite.dataRegionMetrics throws NPE with empty persisted region

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.9
• Fix Version/s: 2.10, 2.9.1
• Component/s: cache
• Labels: easyfix
• Release Note: Fixed NPE when collecting metrics for not initialized data region.
• Assignee: Ilya Kasnacheev
• Reporter: Ilya Kasnacheev
• Created: 27/Nov/20 13:41
• Updated: 02/Dec/20 12:08
• Resolved: 02/Dec/20 12:08

Description

java.lang.NullPointerException
	at org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryImpl.checkpointBufferPagesCount(PageMemoryImpl.java:1823)
	at org.apache.ignite.internal.processors.cache.persistence.DataRegionMetricsImpl.getUsedCheckpointBufferPages(DataRegionMetricsImpl.java:287)
	at org.apache.ignite.internal.processors.cache.persistence.DataRegionMetricsSnapshot.<init>(DataRegionMetricsSnapshot.java:108)
	at org.apache.ignite.internal.processors.cache.persistence.IgniteCacheDatabaseSharedManager.memoryMetrics(IgniteCacheDatabaseSharedManager.java:815)
	at org.apache.ignite.internal.IgniteKernal.dataRegionMetrics(IgniteKernal.java:3773)

Issue Links

• links to: GitHub Pull Request #8506