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https://issues.apache.org/jira/browse/FREEMARKER-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916194#comment-16916194
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Daniel Dekany commented on FREEMARKER-119:
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{{TemplateException.readObject(ObjectInputStream)}} initializes the {{lock}}
field during standard deserialization. There's even a test case for that. I'm
not yet sure what Hessian and Burlap does, but will check that.
> TemplateException throws NPE after deserialization
> --------------------------------------------------
>
> Key: FREEMARKER-119
> URL: https://issues.apache.org/jira/browse/FREEMARKER-119
> Project: Apache Freemarker
> Issue Type: Bug
> Components: engine
> Affects Versions: 2.3.27-incubating, 2.3.29
> Reporter: Alex Poruchikov
> Priority: Major
>
> freemarker.template.TemplateException cannot be deserealized properly,
> because of transient field "lock", used in getMessage() method. See line 441
> in TemplateException.java.
> It throws NPE when getMessage() method is called on deserialized object.
> Problem appears, at least, with Hessian and Burlap serialization protocols
> from Caucho.com.
>
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