Object lock in freemarker

Hi,

We have a system developed in Struts2 and deployed in Weblogic 10.3.6. But
there is an object lock is appearing while analyzing the thread dump . i am
using freemarker-2.3.13.jar.

"[ACTIVE] ExecuteThread: '276' for queue: 'weblogic.kernel.Default
(self-tuning)'" daemon prio=10 tid=0x00002b8c54e76800 nid=0x3e18 waiting for
monitor entry [0x00002b8c8ca06000] 
java.lang.Thread.State: BLOCKED (on object monitor) 
at freemarker.ext.beans.BeansModelCache.create(BeansModelCache.java:31) 
- waiting to lock <0x00000005243d7bf0> (a java.util.HashMap) 
at freemarker.ext.util.ModelCache.getInstance(ModelCache.java:115) 
at freemarker.ext.beans.BeansWrapper.wrap(BeansWrapper.java:468) 
at
freemarker.template.WrappingTemplateModel.wrap(WrappingTemplateModel.java:134) 
at
org.apache.struts2.views.freemarker.ScopesHashModel.get(ScopesHashModel.java:94) 
at freemarker.core.Environment.getGlobalVariable(Environment.java:1088) 
at freemarker.core.Environment.getVariable(Environment.java:1074) 
at freemarker.core.Identifier._getAsTemplateModel(Identifier.java:70) 
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) 
at freemarker.core.Dot._getAsTemplateModel(Dot.java:74) 
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) 
at freemarker.core.BuiltIn$defaultBI._getAsTemplateModel(BuiltIn.java:907) 
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) 
at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:86) 
at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) 
at freemarker.core.Expression.getStringValue(Expression.java:93) 






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