Hi, I've got request threads hanging -- I can't seem to find out why. I've got a servlet that is sending an image retrieved from Jackrabbit. I use Commons IO -- IOUtils.copy()-- to copy the stream from the Jackrabbit node to response.getOutputStream().
Over time, the Tomcat manager shows an increasing number of request threads hanging for a long (infinite?) time. It's erratic, but the thread appears to be stuck when a request is not allowed to complete, e.g. if I hit "stop" on my browser while downloading the image. I can't replicate this on my test machine. My configuration is httpd 2.0.52 -> mod_jk 1.2.26 -> Tomcat 6.0.18 (Windows) with tcnative 1.1.14. I used jconsole to get a dump of the stuck thread -- see below. It looks like it is hanging on native method sendbb. I checked the archives and issue list, couldn't find anything relevant. Would appreciate any suggestions for further investigation. Best, WILL Name: ajp-8009-1 State: RUNNABLE Total blocked: 56 Total waited: 1,111 Stack trace: org.apache.tomcat.jni.Socket.sendbb(Native Method) org.apache.coyote.ajp.AjpAprProcessor.flush(AjpAprProcessor.java:1184) org.apache.coyote.ajp.AjpAprProcessor$SocketOutputBuffer.doWrite(AjpAprProcessor.java:1271) org.apache.coyote.Response.doWrite(Response.java:560) org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353) org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434) org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:349) org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:381) org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:370) org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89) org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1026) org.apache.commons.io.IOUtils.copy(IOUtils.java:999) com.forio.broadcast.controller.view.ImageView.renderMergedOutputModel(ImageView.java:29) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:257) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1183) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:902) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
