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https://issues.apache.org/jira/browse/SLING-3317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ian Boston resolved SLING-3317.
-------------------------------
Resolution: Fixed
> Concurrent access to WeakHashMap in ConcurrentCache causes infinite loop,
> 100% CPU usage
> ----------------------------------------------------------------------------------------
>
> Key: SLING-3317
> URL: https://issues.apache.org/jira/browse/SLING-3317
> Project: Sling
> Issue Type: Bug
> Components: Scripting
> Reporter: Takahito Kikuchi
> Assignee: Ian Boston
> Fix For: Scripting JSP 2.3.4
>
>
> On a web application with Apache Sling Scripting JSP 2.0.24, 100% CPU usage
> problem happened as following. It looks similar to the tomcat problem,
> https://issues.apache.org/bugzilla/show_bug.cgi?id=50078
> ----
> java.lang.Thread.State: RUNNABLE
> at java.util.WeakHashMap.get(WeakHashMap.java:470)
> at org.apache.el.util.ConcurrentCache.get(ConcurrentCache.java:24)
> at
> org.apache.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:90)
> at
> org.apache.el.lang.ExpressionBuilder.build(ExpressionBuilder.java:146)
> at
> org.apache.el.lang.ExpressionBuilder.createValueExpression(ExpressionBuilder.java:190)
> at
> org.apache.el.ExpressionFactoryImpl.createValueExpression(ExpressionFactoryImpl.java:68)
> at
> org.apache.sling.scripting.jsp.jasper.el.ExpressionEvaluatorImpl.parseExpression(ExpressionEvaluatorImpl.java:45)
> at
> org.apache.sling.scripting.jsp.jasper.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:55)
> ----
> java.lang.Thread.State: RUNNABLE
> at java.util.WeakHashMap.eq(WeakHashMap.java:343)
> at java.util.WeakHashMap.put(WeakHashMap.java:521)
> at java.util.WeakHashMap.putAll(WeakHashMap.java:640)
> at org.apache.el.util.ConcurrentCache.put(ConcurrentCache.java:34)
> at
> org.apache.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:123)
> at
> org.apache.el.lang.ExpressionBuilder.build(ExpressionBuilder.java:146)
> at
> org.apache.el.lang.ExpressionBuilder.createValueExpression(ExpressionBuilder.java:190)
> at
> org.apache.el.ExpressionFactoryImpl.createValueExpression(ExpressionFactoryImpl.java:68)
> at
> org.apache.sling.scripting.jsp.jasper.el.ExpressionEvaluatorImpl.parseExpression(ExpressionEvaluatorImpl.java:45)
> at
> org.apache.sling.scripting.jsp.jasper.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:55)
> ----
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