Servlet not injected into newly created action in higly concurrent env
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Key: STR-3161
URL: https://issues.apache.org/struts/browse/STR-3161
Project: Struts 1
Issue Type: Bug
Components: Core
Affects Versions: 1.3.8
Environment: win xp, jvm 1.5.0_12
Reporter: Bartek Wasko
In struts 1.3.8 we encountered such an issue
getServlet() invoked from action code returns null.
After quick investigation I found a bit susspicious place in the
RequestProcessor#processActionCreate code.
The synchronized block seems to be a bit risky in highly concurrent
environment because it does not cover also the code injecting servlet into
freshly created action:
if (instance.getServlet() == null) {
instance.setServlet(this.servlet);
}
After I had extended synchronisation to above code fragment, it seems, our
nullpointer vanished.
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