Hi, One obvious possibility is that your SMS gateway (or your connection to it) is down - thus all threads are being 'blocked' waiting for a response from the gateway. This is supported by the fact that the threads are all blcoked in the socketRead0 call.
Can I suggest, if you haven't already, to ensure you set a connect timeout and a 'wait' timeout (i.e. only wait x ms or secs before terminating the request and signalling a failure). I'm not sure what the default socket connect and read/write timeouts in Java are (they may be forever) but if they default to the OS level timeouts then they can be as much as 15 minutes (5 minutes + 3x retry). Hope this helps On Tue, 2010-08-17 at 15:18 +0530, sasidhar prabhakar wrote: > Tomcat hangs ever few hours. > In server.xml maxThreads are 300. > > In thread dump I observed every thread doing the same thing. > In my code I sends sms to users by using HttpURLConnection. > I am using this code for months I didn't get the problem earlier. > For few days I am getting this problem consistently. Whenever tomcat hangs I > takes the thread dump, > every time it shows the same results. > > Here is my one of threads dump. this is common for all remaining threads. > > Somebody guide me to solve this problem. I am trying but unable to do this > > "http-80-300" daemon prio=1 tid=0x76890ef0 nid=0x6bb6 runnable > [0x6def0000..0x6def0db0] > at java.net.SocketInputStream.socketRead0(Native Method) > at java.net.SocketInputStream.read(SocketInputStream.java:129) > at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) > at java.io.BufferedInputStream.read1(BufferedInputStream.java:256) > at java.io.BufferedInputStream.read(BufferedInputStream.java:313) > - locked <0xb1332658> (a java.io.BufferedInputStream) > at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:681) > at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:626) > at > sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:983) > - locked <0xb1332690> (a sun.net.www.protocol.http.HttpURLConnection) > at SendSms.sendToSingleRecipientNoNpri(SendSms.java:89) > at CreateAccountAction.execute(CreateAccountAction.java:86) > at > org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) > at > org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) > at > org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) > at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) > at com.amulyam.servlet.RedirectFilter.doFilter(RedirectFilter.java:56) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) > at > org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) > at > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) > at > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) > at > org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) > at java.lang.Thread.run(Thread.java:595) -- Best Regards, Brett Delle Grazie ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
