ashwini kuntamukkala created FREEMARKER-32:
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Summary: Memory Leak
Key: FREEMARKER-32
URL: https://issues.apache.org/jira/browse/FREEMARKER-32
Project: Apache Freemarker
Issue Type: Bug
Components: engine
Affects Versions: 2.3.23
Environment: Linux, JDK 1.8
Reporter: ashwini kuntamukkala
When processing over 2000 calls to hydrate a freemarker template with supplied
pojos, the app server hosting the web app goes out of memory. When I looked at
the head dump, the freemarker.template.DefaultObjectWrapper's
classInstrospector instance of freemarker.ext.beans.ClassIntrospector seems to
holding on to instance of pojos apparently in a hashmap.
freemarker.ext.beans.ClassIntrospector -->
java.util.concurrent.ConcurrentHashMap -->
.\java.util.concurrent.ConcurrentHashMap$Segment[16]
I am initializing the set up in this way once when the application boots up
cfg = new Configuration(new Version(2, 3, 23));
cfg.setDefaultEncoding("UTF-8");
cfg.setLocale(Locale.US);
cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
cfg.setClassForTemplateLoading(FreemarkerTransformer.class,
"/templates");
So during a burst of calls, I run out of 512M of PermGenSize on my JVM.
Is there a workaround to solve this problem?
Thank you
Ashwin
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