The ClassUtil class is not thread-safe
--------------------------------------
Key: JBPM-1139
URL:
http://jira.jboss.com/jira/browse/JBPM-1139
Project: JBoss jBPM
Issue Type: Bug
Components: Core Engine
Affects Versions: jBPM jPDL 3.2.3
Reporter: Wojciech Gdela
Assigned To: Tom Baeyens
Attachments: ClassUtil-concurrency-issue.zip
The ClassUtil class is not thread-safe. The exception will occur when two thread
simultanously try do deserialize variables from two different process definitions. Look at
the code:
{code}
public ContextObjectInputStream(final InputStream in,
ProcessInstance processInstance) throws IOException {
super(in);
this.setProcessInstance(processInstance);
ClassUtil.setProcessInstance(processInstance);
}
...
protected Class resolveClass(final ObjectStreamClass desc)
throws IOException, ClassNotFoundException {
return ClassUtil.forName(desc.getName(), ContextObjectInputStream.class);
}
...
ContextObjectInputStream cois = new ContextObjectInputStream(bais,
definition.createProcessInstance());
// when here another thread tries to execute the same code with another process instance
there will be a problem
return cois.readObject();
{/code}
Further description of issue is in attached test case.
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