[infinispan-issues] [JBoss JIRA] (ISPN-12100) NPE when retrieving statistics

[Martijn Dashorst (Jira)]

Martijn Dashorst created ISPN-12100:
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             Summary: NPE when retrieving statistics
                 Key: ISPN-12100
                 URL: https://issues.redhat.com/browse/ISPN-12100
             Project: Infinispan
          Issue Type: Bug
          Components: Hibernate Cache, WildFly Server
    Affects Versions: 9.4.18.Final
            Reporter: Martijn Dashorst


When retrieving the statistics of infinispan caches I get a NullPointerException at the following place:
{code:java}
java.lang.NullPointerException
	at org.infinispan at 9.4.16.Final//org.infinispan.stats.impl.StatsImpl.<init>(StatsImpl.java:54)
	at org.infinispan at 9.4.16.Final//org.infinispan.cache.impl.CacheImpl.getStats(CacheImpl.java:1405)
	at org.infinispan at 9.4.16.Final//org.infinispan.cache.impl.AbstractDelegatingAdvancedCache.getStats(AbstractDelegatingAdvancedCache.java:301)
	at org.infinispan at 9.4.16.Final//org.infinispan.stats.impl.CacheContainerStatsImpl.getStats(CacheContainerStatsImpl.java:617)
	at org.infinispan at 9.4.16.Final//org.infinispan.stats.impl.CacheContainerStatsImpl.getRequiredMinimumNumberOfNodes(CacheContainerStatsImpl.java:138)
{code}

This is while accessing the statistics through the cachemanager through the code below:

{code:java}
@ApplicationScoped
public class InfinispanService {
	@Resource(name = "java:comp/env/infinispan/hibernate/entity")
	private Cache<?, ?> entityCache;

	public void stats() {
		EmbeddedCacheManager cacheManager = entityCache.getCacheManager();
		cacheManager.getStats().getRequiredMinimumNumberOfNodes();
	}
}
{code}

This is done in wildfly 19.0.1.Final, running using standalone.xml.

Obviously I'm digging into internals but probably this should not throw a NPE. The workaround is of course not calling getRequiredMinimumNumberOfNodes() (as in this particular case that is not configured IIUC).



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