Re: tomcat hangs without anything
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Maurice, On 3/11/2010 3:42 PM, Maurice Mengel wrote: Hi! I am new to tomcat. It try to use it with some servlet (oaicat). It seems to run well on my pc at work, but I cannot run it on my laptop on which I would like to develop. I start it, it looks fine. And after a few seconds or minutes, I doesn't answer any response. Do you mean that it refuses HTTP requests, or you get a connection but nothing ever displays? I uninstalled already all unnecessary versions of java, tried with different version. Installed a new tomcat. - windows xp - I start tomcat with bin\startup.bat Can you post everything that shows up on the console during Tomcat startup? IIRC, bin\startup.bat leaves the window open and stdout just goes to the terminal. - jdk 1.6.0_14 Since you have the JDK, you should have a program called jstack.exe: you can run that with the pid of the running JVM to see what all the JVM threads are doing. Post the output of jstack.exe and we'll take a look. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkuZV/QACgkQ9CaO5/Lv0PD4lwCeL4GM/6fSmNkbjrnOQ4ZocZgn X1wAoKHRhGsPaZg9+TfZWdWY9jBxYY3A =xuug -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: tomcat hangs without anything
1) thanks for the very quick response! 2) I get the static page, because it is still in the brower cache, browser is loading, but never actually displays anything; after a very long time, a timeout. How do you describe that? 3) yes stout goes to console, see attachment 4) here is the output of jstack. It doesn't tell me much. Thanks in advance! Maurice 2010-03-11 22:24:34 Full thread dump Java HotSpot(TM) Client VM (14.3-b01 mixed mode, sharing): http-8080-1 daemon prio=6 tid=0x0344b000 nid=0x180c in Object.wait() [0x03adf000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d0068 (a org.apache.tomcat.util.net.JIoEndpoint$Worker) at java.lang.Object.wait(Object.java:485) at org.apache.tomcat.util.net.JIoEndpoint$Worker.await(JIoEndpoint.java:458) - locked 0x077d0068 (a org.apache.tomcat.util.net.JIoEndpoint$Worker) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:484) at java.lang.Thread.run(Thread.java:619) TP-Monitor daemon prio=6 tid=0x03449800 nid=0x1e40 in Object.wait() [0x03a7f000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d00e8 (a org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable) at org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable.run(ThreadPool.java:565) - locked 0x077d00e8 (a org.apache.tomcat.util.threads.ThreadPool$MonitorRunnable) at java.lang.Thread.run(Thread.java:619) TP-Processor4 daemon prio=6 tid=0x031afc00 nid=0x13b0 runnable [0x03a2f000] java.lang.Thread.State: RUNNABLE at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390) - locked 0x077d01c8 (a java.net.SocksSocketImpl) at java.net.ServerSocket.implAccept(ServerSocket.java:453) at java.net.ServerSocket.accept(ServerSocket.java:421) at org.apache.jk.common.ChannelSocket.accept(ChannelSocket.java:307) at org.apache.jk.common.ChannelSocket.acceptConnections(ChannelSocket.java:661) at org.apache.jk.common.ChannelSocket$SocketAcceptor.runIt(ChannelSocket.java:872) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690) at java.lang.Thread.run(Thread.java:619) TP-Processor3 daemon prio=6 tid=0x03441400 nid=0x1dec in Object.wait() [0x039df000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d0470 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Object.wait(Object.java:485) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662) - locked 0x077d0470 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Thread.run(Thread.java:619) TP-Processor2 daemon prio=6 tid=0x03466400 nid=0x1db8 in Object.wait() [0x0398f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d0510 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Object.wait(Object.java:485) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662) - locked 0x077d0510 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Thread.run(Thread.java:619) TP-Processor1 daemon prio=6 tid=0x03448400 nid=0x1f60 in Object.wait() [0x0393f000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d05b0 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Object.wait(Object.java:485) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:662) - locked 0x077d05b0 (a org.apache.tomcat.util.threads.ThreadPool$ControlRunnable) at java.lang.Thread.run(Thread.java:619) http-8080-Acceptor-0 daemon prio=6 tid=0x031b4c00 nid=0x173c runnable [0x038ef000] java.lang.Thread.State: RUNNABLE at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390) - locked 0x092697e0 (a java.net.SocksSocketImpl) at java.net.ServerSocket.implAccept(ServerSocket.java:453) at java.net.ServerSocket.accept(ServerSocket.java:421) at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61) at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:352) at java.lang.Thread.run(Thread.java:619) ContainerBackgroundProcessor[StandardEngine[Catalina]] daemon prio=6 tid=0x0345d400 nid=0x18dc waiting on condition [0x0389f000] java.lang.Thread.State: TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1579) at java.lang.Thread.run(Thread.java:619) GC Daemon
Re: tomcat hangs without anything
Christopher Schultz wrote: - windows xp - I start tomcat with bin\startup.bat Can you post everything that shows up on the console during Tomcat startup? IIRC, bin\startup.bat leaves the window open and stdout just goes to the terminal. Not exactly. When you start it via startup.bat, it opens another window inside of which Tomcat is running. There, you do see Tomcat's stdout. The problem is that if Tomcat stops or crashes, this window instantly closes, so you may miss the last messages. If you start Tomcat with the command catalina.bat run however, then Tomcat runs in the same command window where you issued this command (iow it does not open a second window). In that case, if Tomcat stops or crashes, the window does not close and you still see the messages if any. You can stop Tomcat by entering CTRL-C once in the same window. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: tomcat hangs without anything
As far as I can tell, it tells essentially the same. Now I am using different jdk and the catalina.bat run command. I didn't know I could copy from this windows at all. Usually, I use cygwin, but this seems not to make anything easier. C:\Apache\apache-tomcat-6.0.24bin\catalina.bat run Using CATALINA_BASE: C:\Apache\apache-tomcat-6.0.24 Using CATALINA_HOME: C:\Apache\apache-tomcat-6.0.24 Using CATALINA_TMPDIR: C:\Apache\apache-tomcat-6.0.24\temp Using JRE_HOME:C:\Java\jdk1.6.0_17 Using CLASSPATH: C:\Apache\apache-tomcat-6.0.24\bin\bootstrap.jar Mar 11, 2010 10:30:12 PM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performanc e in production environments was not found on the java.library.path: C:\Java\jdk 1.6.0_17\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\mingw\b in;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Inte l\Wireless\Bin\;C:\Program Files\Diskeeper Corporation\Diskeeper\;C:\Program Fil es\ThinkPad\ConnectUtilities;C:\Program Files\Common Files\Lenovo;C:\Program Fil es\Lenovo\Client Security Solution;;C:\strawberry\c\bin;C:\strawberry\perl\bin;C :\WINDOWS\system32\WindowsPowerShell\v1.0;C:\Program Files\QuickTime\QTSystem\;C :\cygwin\bin;C:\Apache\ant\bin;C:\Apache\maven\bin;C:\Program Files\Nmap;C:\Prog ram Files\gs\gs8.70\bin Mar 11, 2010 10:30:13 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 Mar 11, 2010 10:30:13 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1152 ms Mar 11, 2010 10:30:13 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 11, 2010 10:30:13 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.24 Mar 11, 2010 10:30:13 PM org.apache.catalina.startup.HostConfig deployDescriptor INFO: Deploying configuration descriptor host-manager.xml Mar 11, 2010 10:30:14 PM org.apache.catalina.startup.HostConfig deployDescriptor INFO: Deploying configuration descriptor manager.xml Mar 11, 2010 10:30:14 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory docs Mar 11, 2010 10:30:14 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory examples Mar 11, 2010 10:30:15 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory oaicat Mar 11, 2010 10:30:15 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory ROOT Mar 11, 2010 10:30:15 PM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8080 Mar 11, 2010 10:30:16 PM org.apache.jk.common.ChannelSocket init INFO: JK: ajp13 listening on /0.0.0.0:8009 Mar 11, 2010 10:30:16 PM org.apache.jk.server.JkMain start INFO: Jk running ID=0 time=0/63 config=null Mar 11, 2010 10:30:16 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 2628 ms On Thu, Mar 11, 2010 at 10:32 PM, André Warnier a...@ice-sa.com wrote: Maurice Mengel wrote: 3) yes stout goes to console, see attachment The list strips most attachments, and we did not get this one. You may need to paste the screen messages directly here, like you did with the jstack output. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: tomcat hangs without anything
4) no other server. I uninstalled apache-http and didn't do anything to tomcat config. I hope this is what you ask me for: !-- A Connector represents an endpoint by which requests are received and responses are returned. Documentation at : Java HTTP Connector: /docs/config/http.html (blocking non-blocking) Java AJP Connector: /docs/config/ajp.html APR (HTTP/AJP) Connector: /docs/apr.html Define a non-SSL HTTP/1.1 Connector on port 8080 -- Connector port=8080 protocol=HTTP/1.1 connectionTimeout=2 redirectPort=8443 / !-- A Connector using the shared thread pool-- !-- Connector executor=tomcatThreadPool port=8080 protocol=HTTP/1.1 connectionTimeout=2 redirectPort=8443 / -- !-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the JSSE configuration, when using APR, the connector should be using the OpenSSL style configuration described in the APR documentation -- !-- Connector port=8443 protocol=HTTP/1.1 SSLEnabled=true maxThreads=150 scheme=https secure=true clientAuth=false sslProtocol=TLS / -- I am not sure if Tomcat starts to refuse after about 1 min or after a certain no of requests. I would guess it usually takes about 1 min. Not always the same time, though. Not always the same no of requests either. Example: This time I was able to click 10 times on manager/status and list applications before it froze. The next time it froze not even after 50 times. I wrote a line in this email and then it didn't work anymore. On Thu, Mar 11, 2010 at 10:36 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Maurice, On 3/11/2010 4:26 PM, Maurice Mengel wrote: 2) I get the static page, because it is still in the brower cache, browser is loading, but never actually displays anything; after a very long time, a timeout. How do you describe that? That sounds like a connection timeout, rather than a refusal. Basically, the OS accepts the connection to the socket, but then the server (Tomcat) never picks up the phone, and eventually a timeout occurs. 3) yes stout goes to console, see attachment Your attachment was stripped: please just paste it into your next reply. 4) here is the output of jstack. Everything looks okay in there to me. Can you post your Connector configuration(s) from conf/server.xml? Are you using any web server in front of Tomcat? You didn't mention it, but it's always good to check. The Tomcat's refusal to answer requests come after a certain number of requests are issued (say, the 10th request always fails), or a certain period of time (after 30 seconds, all failures)? Once you get yourself into this state, does Tomcat ever recover? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkuZYmAACgkQ9CaO5/Lv0PCtjACgpAzueLh7RoH2/6HoFKyIrMst FJcAn1Mhd68UoDYR30aEiANDa6lRCPdM =QHOo -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: tomcat hangs without anything
From: Maurice Mengel [mailto:mauricemen...@gmail.com] Subject: Re: tomcat hangs without anything 4) here is the output of jstack. Everything looks pretty normal here. http-8080-1 daemon prio=6 tid=0x0344b000 nid=0x180c in Object.wait() [0x03adf000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on 0x077d0068 (a org.apache.tomcat.util.net.JIoEndpoint$Worker) at java.lang.Object.wait(Object.java:485) The one above is waiting for a socket from the next connection attempt by the client. TP-Monitor daemon prio=6 tid=0x03449800 nid=0x1e40 in Object.wait() The thread pool monitor, doing nothing, as usual. TP-Processor4 daemon prio=6 tid=0x031afc00 nid=0x13b0 runnable This one is waiting for a connection over the AJP port (8009), which you likely aren't using. TP-Processor3 daemon prio=6 tid=0x03441400 nid=0x1dec TP-Processor2 daemon prio=6 tid=0x03466400 nid=0x1db8 TP-Processor1 daemon prio=6 tid=0x03448400 nid=0x1f60 Idle worker threads, waiting for requests to show up. http-8080-Acceptor-0 daemon prio=6 tid=0x031b4c00 nid=0x173c runnable This one is waiting for a connection over the HTTP port (8080). ContainerBackgroundProcessor[StandardEngine[Catalina]] daemon prio=6 tid=0x0345d400 nid=0x18dc A normal Tomcat background thread. GC Daemon daemon prio=2 tid=0x03194c00 nid=0x18f4 Low Memory Detector daemon prio=6 tid=0x02ca6800 nid=0x1e00 runnable CompilerThread0 daemon prio=10 tid=0x02ca3800 nid=0x1c6c Attach Listener daemon prio=10 tid=0x02ca2000 nid=0x1774 Signal Dispatcher daemon prio=10 tid=0x02ca0c00 nid=0x1a34 runnable Finalizer daemon prio=8 tid=0x02c62000 nid=0x1ea0 Reference Handler daemon prio=10 tid=0x02c5d400 nid=0x19c0 Standard JVM internal threads. main prio=6 tid=0x002a7400 nid=0x1528 runnable [0x0038f000] The initial Tomcat thread, waiting for a shutdown command. VM Thread prio=10 tid=0x02c5bc00 nid=0x1c2c runnable VM Periodic Task Thread prio=10 tid=0x02cab800 nid=0x1db4 More internal JVM threads. All looks perfectly normal for an idle Tomcat, waiting for clients to make requests. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
RE: tomcat hangs without anything
From: Maurice Mengel [mailto:mauricemen...@gmail.com] Subject: Re: tomcat hangs without anything I hope this is what you ask me for: It is, and it shows nothing unusual - all pretty standard settings. Example: This time I was able to click 10 times on manager/status and list applications before it froze. What happens if you start another browser to connect to Tomcat with? I wrote a line in this email and then it didn't work anymore. How much memory do you have on the system? Is it oversubscribed? Can you run JConsole and display what's going on inside the JVM Tomcat is using? Might show heap exhaustion, although that would seem very unlikely based on the previously posted stack trace. (Which was taken /after/ Tomcat became unresponsive, correct?) - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
Re: tomcat hangs without anything
I have changed server.xml to a ridiculous connectionTimeout value and now it seems to run better. Since I did this for no good reason at all, it is probably not the reason it runs better. Connector port=8080 protocol=HTTP/1.1 connectionTimeout=2 redirectPort=8443 / Jconsole seems not to be able to connect, although servlet is responsive. I think I probably need to read more about jconsole, but I guess I need to sleep first. For the time being it works now! Thanks for the great help! Your help makes tomcat a lot more sympathetic to me! Maurice On Thu, Mar 11, 2010 at 11:06 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Maurice Mengel [mailto:mauricemen...@gmail.com] Subject: Re: tomcat hangs without anything I hope this is what you ask me for: It is, and it shows nothing unusual - all pretty standard settings. Example: This time I was able to click 10 times on manager/status and list applications before it froze. What happens if you start another browser to connect to Tomcat with? I wrote a line in this email and then it didn't work anymore. How much memory do you have on the system? Is it oversubscribed? Can you run JConsole and display what's going on inside the JVM Tomcat is using? Might show heap exhaustion, although that would seem very unlikely based on the previously posted stack trace. (Which was taken /after/ Tomcat became unresponsive, correct?) - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
RE: tomcat hangs without anything
From: Maurice Mengel [mailto:mauricemen...@gmail.com] Subject: Re: tomcat hangs without anything Connector port=8080 protocol=HTTP/1.1 connectionTimeout=2 redirectPort=8443 / That time value only controls how long Tomcat will wait after a connection request to receive the first byte of data. If raising it beyond the default of 20 seconds helps, this is indicative of a client, not server, problem. Are you perhaps running out of memory on the laptop, causing processes to get swapped out? Jconsole seems not to be able to connect Odd; there are sometimes problems using JConsole with Tomcat running as a service, but I've not heard of any with Tomcat started with the scripts on XP. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
