Hi

>  throw new ServletException();

That was the difference. I threw a IllegalStateException(), so tomcat sent 
"0\r\n".
I changed my code to throw a ServletException() and now it works.
Thanks for that.


One very little thing left: Is there a way to suppress the logged exception:
Jun 03, 2016 11:00:18 PM org.apache.catalina.core.StandardWrapperValve invoke
SCHWERWIEGEND: Servlet.service() for servlet [Stream] in context with path [] 
threw exception [null] with root cause
javax.servlet.ServletException
...
        at com.osiris4.http.servlets.Stream.doRequest(Stream.java:36)
        at com.osiris4.http.servlets.Base.service(Base.java:36)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
        at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
        at 
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
        at 
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
        at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
        at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)

BTW: Why does it say "exception [null]"?


As I regard closing a connection a valid result of processing a request, I 
would have expected a way to cleanly terminate a connection without logging a 
severe exception.


Regards,
   Steffen

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