https://issues.apache.org/bugzilla/show_bug.cgi?id=56042
Bug ID: 56042
Summary: java.lang.IllegalStateException: Calling
[asyncComplete()] is not valid for a request with
Async state [MUST_DISPATCH]
Product: Tomcat 7
Version: 7.0.50
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
The issue appears if the response has been set before startAsync:
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
AsyncContext asyncContext = request.startAsync(request, response);
asyncContext.dispatch();
You might wonder why would anyone do that? The actual scenario is a bit more
complex. It involves a separate thread that completes very fast, even before
startAsync is called.
The resulting stack trace:
java.lang.IllegalStateException: Calling [asyncComplete()] is not valid for a
request with Async state [MUST_DISPATCH]
at
org.apache.coyote.AsyncStateMachine.asyncComplete(AsyncStateMachine.java:227)
at
org.apache.coyote.http11.Http11Processor.actionInternal(Http11Processor.java:358)
at
org.apache.coyote.http11.AbstractHttp11Processor.action(AbstractHttp11Processor.java:871)
at org.apache.coyote.Request.action(Request.java:344)
at
org.apache.catalina.core.AsyncContextImpl.complete(AsyncContextImpl.java:92)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:140)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:744)
The Servlet spec says: "It is illegal to call startAsync if ..., or if the
response has been committed and closed, ...".
If that is indeed the reason, a clear error should be raised, and startAsync
not be allowed to proceed. Or perhaps it is an issue that can be fixed? For
what it's worth it actually works in Jetty even though the spec says it is
illegal.
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