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I have developed a multithreaded web application that runs in Tomcat. But I cannot use
shutdown.bat
Tomcat didn't stop gracefully. In the debugger I saw that threads continue to run after shutdown command. Do I have to fix my application code to meet special requirements ? Thanks.
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graceful shutdown means it will give delay before terminate the process. Here my tomcat process is terminated immediately. I verified using JPS command.
When using an Executor, we can shut it down by calling the shutdown() or shutdownNow() methods. Although, it won't wait until all threads stop executing. Waiting for existing threads to complete their execution can be achieved by using the awaitTermination() method.
Tomcat is the reference implementation of the Servlet and JSP APIs. It is as "thread safe" as any servlet container.
By default, Tomcat sets maxThreads to 200, which represents the maximum number of threads allowed to run at any given time. You can also specify values for the following parameters: minSpareThreads : the minimum number of threads that should be running at all times. This includes idle and active threads.
... and to tie the other responses to the workings of Java Servlet environments;
if you don't declare your threads as daemon threads, the way to signal the server shutdown to the threads is to implement a ServletContextListener and configure it to your web application (web.xml). When Tomcat is shutting down, it will first shut down each application, which in turn will cause contextDestroyed() method of the listener to be called - and this is where you can signal your own threads that they should finish their work.
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