High cpu in beanutils WeakHashMap

Solution Verified - Updated 5 Aug 2024

Environment

JBoss Enterprise Application Platform (EAP)
Apache Commons Beanutils

Issue

We see high CPU usage in several threads accessing a WeakHashMap in org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod:

"http-mrkcrsbtvlpr01%2F172.25.70.81-8200-206" daemon prio=10 tid=0x00007fbac8275800 nid=0x4865 runnable [0x00007fba97159000]
   java.lang.Thread.State: RUNNABLE
	at java.util.WeakHashMap.get(WeakHashMap.java:470)
	at org.apache.commons.beanutils.MethodUtils.getMatchingAccessibleMethod(MethodUtils.java:530)
	at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:209)
	at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:217)
	at org.apache.commons.digester.Rule.end(Rule.java:253)

Resolution

Upgrade your commons beanutils library to 1.8.0 or later

Root Cause

Content from issues.apache.org is not included.BEANUTILS-318
HashMaps and WeakHashMaps are not thread safe per High CPU due to multiple Java threads accessing HashMap simultaneously

SBR

JVM & Diagnostics

Product(s)

Red Hat JBoss Enterprise Application Platform

Components

jbossas

Category

Troubleshoot

Tags

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