On 12/10/2016 16:22, Rallavagu wrote: > Tomcat 7.0.70 - Sun JDK 1.7.0_80 > > I have following long running thread (almost 5 sec).
No you don't. That thread isn't doing it any work. It is blocking, waiting for I/O. > It appears to be reading data from socket Sort of correct. It is waiting for data to arrive. > (external resource potentially). Wrong. > Wonder how I > could go about debug these kind of threads to understand which external > resource is it spending more time on reading. Thank. The stack trace contains class names and line numbers. The source code is freely available. While the class names themselves provide a broad hint as to what this thread is waiting for, you always have the option of looking at the source code. In this case start with these: AbstractHttp11Processor line 994 Http11Processor line 168 Mark > > "http-bio-28080-exec-523" daemon prio=10 tid=0x00007fc5e403e000 > nid=0x3cbd runnable [0x00007fc51ce0d000] > java.lang.Thread.State: RUNNABLE > at java.net.SocketInputStream.socketRead0(Native Method) > at java.net.SocketInputStream.read(SocketInputStream.java:152) > at java.net.SocketInputStream.read(SocketInputStream.java:122) > at > org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:516) > > at > org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:501) > > at > org.apache.coyote.http11.Http11Processor.setRequestLineReadTimeout(Http11Processor.java:168) > > at > org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:994) > > at > org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623) > > at > org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) > > - locked <0x00000006e20ac9e8> (a > org.apache.tomcat.util.net.SocketWrapper) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) > > at java.lang.Thread.run(Thread.java:745) > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
