https://issues.apache.org/bugzilla/show_bug.cgi?id=51432
Bug #: 51432
Summary: NullPointerException happens when it costs more time
on async processisng than async timeout value
Product: Tomcat 7
Version: 7.0.16
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: zhh200...@gmail.com
Classification: Unclassified
In the example "examples\WEB-INF\classes\async\Async1.java",
if we change some value to let the sleeping time of the AsyncThread greater
than async timeout value, there will be a NullPointerException.
Please see the detailed information as the following:
java code:
====================================================================
protected void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
final AsyncContext actx = req.startAsync();
actx.setTimeout(8*1000);
Runnable run = new Runnable() {
@Override
public void run() {
try {
String path = "/jsp/async/async1.jsp";
Thread.currentThread().setName("Async1-Thread");
log.info("Putting AsyncThread to sleep");
Thread.sleep(12*1000);
log.info("Dispatching to "+path);
actx.dispatch(path);
}catch (InterruptedException x) {
log.error("Async1",x);
}catch (IllegalStateException x) {
log.error("Async1",x);
}
}
};
Thread t = new Thread(run);
t.start();
}
error:
====================================================================
2011-6-25 10:32:11 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]
2011-6-25 10:32:11 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-bio-8009"]
2011-6-25 10:32:11 org.apache.catalina.startup.Catalina start
信息: Server startup in 497 ms
2011-6-25 10:32:14 async.Async1$1 run
信息: Putting AsyncThread to sleep
2011-6-25 10:32:26 async.Async1$1 run
信息: Dispatching to /jsp/async/async1.jsp
Exception in thread "Async1-Thread" java.lang.NullPointerException
at
org.apache.catalina.connector.Request.getServletContext(Request.java:1606)
at
org.apache.catalina.core.AsyncContextImpl.dispatch(AsyncContextImpl.java:138)
at async.Async1$1.run(Async1.java:49)
at java.lang.Thread.run(Thread.java:619)
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