Tomcat request timeout

Question

In my web application there are some requests which last longer than 20 seconds  But in some situations the code can lead to infinite loop or something similar which slows down the server    I want to put a request timeout for 60 sec on the server side  Is this implemented in tomcat    Thank you  Horatiu

User · Answer

Add tomcat in Eclipse  In Eclipse  as tomcat server  double click  Tomcat v7 0 Server at Localhost   Change the properties as shown in time out settings 45 to whatever sec you like

User · Answer

With Tomcat 7  you can add the StuckThreadDetectionValve which will enable you to identify threads that are  stuck   You can set-up the valve in the Context element of the applications where you want to do detecting    lt Context     gt           lt Valve      className  org apache catalina valves StuckThreadDetectionValve      threshold  60    gt         lt  Context gt    This would write a WARN entry into the tomcat log for any thread that takes longer than 60 seconds  which would enable you to identify the applications and ban them because they are faulty   Based on the source code you may be able to write your own valve that attempts to stop the thread  however this would have knock on effects on the thread pool and there is no reliable way of stopping a thread in Java without the cooperation of that thread

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You can set the default time out in the server xml    lt Connector URIEncoding  UTF-8       acceptCount  100       connectionTimeout  20000       disableUploadTimeout  true       enableLookups  false       maxHttpHeaderSize  8192       maxSpareThreads  75       maxThreads  150       minSpareThreads  25       port  7777       redirectPort  8443   gt

User · Answer

If you are trying to prevent a request from running too long  then setting a timeout in Tomcat will not help you  As Chris says  you can set the global timeout value for Tomcat  But  from The Apache Tomcat Connector - Generic HowTo Timeouts  see the Reply Timeout section      JK can also use a timeout on request replies  This timeout does not   measure the full processing time of the response  Instead it controls    how much time between consecutive response packets is allowed       In most cases  this is what one actually wants  Consider for example   long running downloads  You would not be able to set an effective   global reply timeout  because downloads could last for many minutes    Most applications though have limited processing time before starting   to return the response  For those applications you could set an   explicit reply timeout  Applications that do not harmonise with reply   timeouts are batch type applications  data warehouse and reporting   applications which are expected to observe long processing times       If JK aborts waiting for a response  because a reply timeout fired    there is no way to stop processing on the backend  Although you free   processing resources in your web server  the request will continue to   run on the backend - without any way to send back a result once the   reply timeout fired    So Tomcat will detect that the servlet has not responded within the timeout and will send back a response to the user  but will not stop the thread running  I don t think you can achieve what you want to do

User · Answer

For anyone who doesn t like none of the solutions posted above like me then you can simply implement a timer yourself and stop the request execution by throwing a runtime exception  Something like below                    try                                          timer schedule new TimerTask                             Override                        public void run                              timer cancel                                                        specify time of the requst    1000                                       catch Exception e                                        throw new RuntimeException  quot the request is taking longer than usual quot                             or preferably use the java guava timeLimiter here

User · Answer

This article talks about setting the timeouts on the server level  http   www coderanch com t 364207 Servlets java Servlet-Timeout-two-ways  What is causing the application to go into infinite loop  If you are opening connections to other resources  you might want to put timeouts on those connections and sending appropriate response when those time out occurs

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