I'd think it's more likely to be timing out while resolving a hostname via DNS, but starting tomcat via strace should show you exactly where it is pausing.
On Thu, May 22, 2008 at 5:08 AM, Adam Hardy <[EMAIL PROTECTED]> wrote: > I'm still frustrated by this freeze. Looking at this thread dump, I can see > it must be the "main" thread that's hanging - but how can I work out > anything more regarding the problem? > > I've done all I can think of to open up the machine it's running on - > stopping all other unnecessary processes such as the firewall, apache, the > DNS server etc. > > Could tomcat be waiting in vain for a port? As far as I can tell, it should > be using 8080 and 8005 - nothing else is set up in server.xml. Yet these > ports are free on the machine. Is there a linux tool I can use to check > those ports? > > Thanks > Adam > > -------- Original Message -------- > Date: Mon, 19 May 2008 23:13:02 +0100 > > 19-May-2008 23:04:32 org.apache.tomcat.util.modeler.BaseModelMBean > preRegister > FINE: preRegister [EMAIL PROTECTED] > Catalina:type=Connector,port=8080 > Full thread dump Java HotSpot(TM) Client VM (1.5.0_12-b04 mixed mode, > sharing): > > "Low Memory Detector" daemon prio=1 tid=0x0809e1a8 nid=0xe39 runnable > [0x00000000..0x00000000] > > "CompilerThread0" daemon prio=1 tid=0x0809cc40 nid=0xe38 waiting on > condition > [0x00000000..0xb2176828] > > "Signal Dispatcher" daemon prio=1 tid=0x0809bd60 nid=0xe37 runnable > [0x00000000..0x00000000] > > "Finalizer" daemon prio=1 tid=0x08094f38 nid=0xe36 in Object.wait() > [0xb23a0000..0xb23a1140] > at java.lang.Object.wait(Native Method) > - waiting on <0x88e609e8> (a java.lang.ref.ReferenceQueue$Lock) > at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116) > - locked <0x88e609e8> (a java.lang.ref.ReferenceQueue$Lock) > at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132) > at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159) > > "Reference Handler" daemon prio=1 tid=0x08094240 nid=0xe35 in Object.wait() > [0xb2421000..0xb24220c0] > at java.lang.Object.wait(Native Method) > - waiting on <0x88e60910> (a java.lang.ref.Reference$Lock) > at java.lang.Object.wait(Object.java:474) > at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116) > - locked <0x88e60910> (a java.lang.ref.Reference$Lock) > > "main" prio=1 tid=0x080557c8 nid=0xe33 runnable [0xbf8d6000..0xbf8d8078] > at java.net.PlainSocketImpl.initProto(Native Method) > at java.net.PlainSocketImpl.<clinit>(PlainSocketImpl.java:84) > at java.net.ServerSocket.setImpl(ServerSocket.java:236) > at java.net.ServerSocket.<init>(ServerSocket.java:178) > at java.net.ServerSocket.<init>(ServerSocket.java:141) > at > > org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:50) > at org.apache.tomcat.util.net.JIoEndpoint.init(JIoEndpoint.java:496) > at > org.apache.coyote.http11.Http11Protocol.init(Http11Protocol.java:177) > at > org.apache.catalina.connector.Connector.initialize(Connector.java:1059) > at > > org.apache.catalina.core.StandardService.initialize(StandardService.java:677) > - locked <0x88f6e690> (a [Lorg.apache.catalina.connector.Connector;) > at > org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792) > at org.apache.catalina.startup.Catalina.load(Catalina.java:518) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:585) > at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:260) > at org.apache.catalina.startup.Bootstrap.init(Bootstrap.java:275) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:585) > at > org.apache.commons.daemon.support.DaemonLoader.load(DaemonLoader.java:160) > > "VM Thread" prio=1 tid=0x08092e48 nid=0xe34 runnable > > "VM Periodic Task Thread" prio=1 tid=0x0809f650 nid=0xe3a waiting on > condition > > Full thread dump Java HotSpot(TM) Client VM (1.5.0_12-b04 mixed mode, > sharing): > > "Low Memory Detector" daemon prio=1 tid=0x0809e1a8 nid=0xe39 runnable > [0x00000000..0x00000000] > > "CompilerThread0" daemon prio=1 tid=0x0809cc40 nid=0xe38 waiting on > condition > [0x00000000..0xb2176828] > > "Signal Dispatcher" daemon prio=1 tid=0x0809bd60 nid=0xe37 runnable > [0x00000000..0x00000000] > > "Finalizer" daemon prio=1 tid=0x08094f38 nid=0xe36 in Object.wait() > [0xb23a0000..0xb23a1140] > at java.lang.Object.wait(Native Method) > - waiting on <0x88e609e8> (a java.lang.ref.ReferenceQueue$Lock) > at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116) > - locked <0x88e609e8> (a java.lang.ref.ReferenceQueue$Lock) > at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132) > at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159) > > "Reference Handler" daemon prio=1 tid=0x08094240 nid=0xe35 in Object.wait() > [0xb2421000..0xb24220c0] > at java.lang.Object.wait(Native Method) > - waiting on <0x88e60910> (a java.lang.ref.Reference$Lock) > at java.lang.Object.wait(Object.java:474) > at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116) > - locked <0x88e60910> (a java.lang.ref.Reference$Lock) > > "main" prio=1 tid=0x080557c8 nid=0xe33 runnable [0xbf8d6000..0xbf8d8078] > at java.net.PlainSocketImpl.initProto(Native Method) > at java.net.PlainSocketImpl.<clinit>(PlainSocketImpl.java:84) > at java.net.ServerSocket.setImpl(ServerSocket.java:236) > at java.net.ServerSocket.<init>(ServerSocket.java:178) > at java.net.ServerSocket.<init>(ServerSocket.java:141) > at > > org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:50) > at org.apache.tomcat.util.net.JIoEndpoint.init(JIoEndpoint.java:496) > at > org.apache.coyote.http11.Http11Protocol.init(Http11Protocol.java:177) > at > org.apache.catalina.connector.Connector.initialize(Connector.java:1059) > at > > org.apache.catalina.core.StandardService.initialize(StandardService.java:677) > - locked <0x88f6e690> (a [Lorg.apache.catalina.connector.Connector;) > at > org.apache.catalina.core.StandardServer.initialize(StandardServer.java:792) > at org.apache.catalina.startup.Catalina.load(Catalina.java:518) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:585) > at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:260) > at org.apache.catalina.startup.Bootstrap.init(Bootstrap.java:275) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:585) > at > org.apache.commons.daemon.support.DaemonLoader.load(DaemonLoader.java:160) > > "VM Thread" prio=1 tid=0x08092e48 nid=0xe34 runnable > > "VM Periodic Task Thread" prio=1 tid=0x0809f650 nid=0xe3a waiting on > condition > > > > Filip Hanik - Dev Lists on 19/05/08 22:17, wrote: > >> just do two thread dumps during the freeze >> >> kill -3 <tomcat process id> >> sleep 5 >> kill -3 <tomcat process id> >> >> the thread dump will identify where it is hanging, and it gets output to >> std.out, by default to catalina.out >> >> Filip >> >> Adam Hardy wrote: >> >>> I've been trying to solve this problem for a couple of hours now and I >>> can't see any solution on google or in the archives. >>> >>> I have tomcat 6.0.13 and java 1.5.0_12 running on debian linux 2.6, my >>> own installation, not the debian packages. >>> >>> I stripped the tomcat config down to the bare minimum, no webapps, and >>> just the one connector configured: >>> >>> <Connector port="8080" protocol="HTTP/1.1" >>> connectionTimeout="20000" >>> redirectPort="8443" /> >>> >>> It takes about 3 mins to start, as you can see from the logging below at >>> the point where BaseModelMBean tries to preregister. >>> >>> The config works fine on my linux workstation, but not on this machine. >>> The machine is a gateway and DNS server also running Apache on port 80, but >>> even with the firewall and the servers down, I can't get around this >>> problem. >>> >>> Can anybody help? >>> >>> >>> FINE: preRegister [EMAIL PROTECTED]:type=StringCache >>> 19-May-2008 17:22:58 org.apache.tomcat.util.modeler.Registry >>> registerComponent >>> FINE: Managed= Catalina:type=Service,serviceName=Catalina >>> 19-May-2008 17:22:58 org.apache.tomcat.util.modeler.BaseModelMBean >>> preRegister >>> FINE: preRegister StandardService[Catalina] >>> Catalina:type=Service,serviceName=Catalina >>> 19-May-2008 17:22:58 org.apache.tomcat.util.modeler.Registry >>> registerComponent >>> FINE: Managed= Catalina:type=Connector,port=8080 >>> 19-May-2008 17:22:58 org.apache.tomcat.util.modeler.BaseModelMBean >>> preRegister >>> FINE: preRegister [EMAIL PROTECTED]:type=Connector,port=8080 >>> 19-May-2008 17:26:07 org.apache.tomcat.util.modeler.BaseModelMBean >>> preRegister >>> FINE: preRegister BaseModelMbean[null] Catalina:type=MBeanFactory >>> 19-May-2008 17:26:07 org.apache.tomcat.util.modeler.BaseModelMBean >>> preRegister >>> FINE: preRegister null Catalina:type=MBeanFactory >>> 19-May-2008 17:26:07 org.apache.tomcat.util.modeler.BaseModelMBean >>> preRegister >>> FINE: preRegister [EMAIL PROTECTED]:type=NamingResources,resourcetype=Global >>> >> > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
