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Posted to users@tomcat.apache.org by Steven Turoff <st...@home.com> on 2001/07/15 06:45:09 UTC
RE: Restarting Tomcat on NT - Solved
Turning off ZoneAlarm solved the problem.
Steve
At 06:47 PM 07/03/2001, you wrote:
>Darrell,
>
>I can't think of any apps I'm running that have integrated web servers.
>Perhaps mySQL? Maybe my firewall (ZoneAlarm)? Emacs?
>
>Steve
>
>At 02:56 PM 07/03/2001, Darrell Porter wrote:
>>Steve,
>>
>>If you're running personal web server, IIS, or some third party apps that
>>have integrated web servers (several webcam products come to mind), then
>>shut these down. This is most likely the offending application.
>>
>>Darrell
>>
>>
>>-----Original Message-----
>>From: Steven Turoff [mailto:steveturoff@home.com]
>>Sent: Tuesday, July 03, 2001 5:30 AM
>>To: tomcat-user@jakarta.apache.org
>>Subject: RE: Restarting Tomcat on NT
>>
>>
>>Actually, I'm not running Tomcat as a service. I meant that I don't have
>>any problems starting Tomcat after rebooting the machine. I've run netstat
>>-a (results below) and can see that the ports are in use, however that
>>information doesn't seem to be very useful. Perhaps I should try running
>>tomcat as a service?
>>
>>Steve
>>
>>At 05:56 AM 07/03/2001, Randy Layman wrote:
>>
>> > No, there is no way to free a port. You mentioned that Tomcat
>>comes
>> >up after a reboot, implying that you are running Tomcat as a service. If
>> >that is the case, the process name is jk_nt_service.exe. Unless you have
>> >another process that is constantly trying to grab that port, Tomcat is
>>still
>> >running - NT does free the ports when the process dies.
>> >
>> > Also, 2000 (and I believe NT) ship with netstat. Using "netstat
>>-a"
>> >you can determine which ports are currently in use (and their state).
>> >
>> > Randy
>> >
>> > > -----Original Message-----
>> > > From: Steven Turoff [mailto:steveturoff@home.com]
>> > > Sent: Monday, July 02, 2001 7:34 PM
>> > > To: tomcat-user@jakarta.apache.org
>> > > Subject: RE: Restarting Tomcat on NT
>> > >
>> > >
>> > > I've already tried that. Tomcat is dead, alright. Is there a way to
>> > > explicitly free up a port on NT?
>> > >
>> > > At 06:04 PM 07/02/2001, you wrote:
>> > > >Maybe you didn't really kill off Tomcat, but just the DOS
>> > > box it was running
>> > > >in,... (I've seen it happen after closing the DOS box, but not after
>> > > >Ctrl+C'ing the program.)
>> > > >
>> > > >Try bringing up the Task Manager, and make sure there aren't
>> > > any instances
>> > > >of a "java" image name running.
>> > > >
>> > > > -- Bill K.
>> > > >
>> > > > > -----Original Message-----
>> > > > > From: Steven Turoff [mailto:steveturoff@home.com]
>> > > > > Sent: Monday, July 02, 2001 3:30 PM
>> > > > > To: tomcat-user@jakarta.apache.org
>> > > > > Subject: Restarting Tomcat on NT
>> > > > >
>> > > > >
>> > > > > I am having problems restarting Tomcat on NT. After a
>> > > reboot of the
>> > > > > machine, Tomcat starts without a problem. However, if I stop
>> > > > > Tomcat and
>> > > > > then attempt to restart, I get the following error:
>> > > > >
>> > > > > FATAL:java.net.BindException: Address in use: bind
>> > > > > java.net.BindException: Address in use: bind
>> > > > > at java.net.PlainSocketImpl.socketBind(Native Method)
>> > > > > at
>> > > java.net.PlainSocketImpl.bind(PlainSocketImpl.java:390)
>> > > > > at java.net.ServerSocket.<init>(ServerSocket.java:173)
>> > > > > at java.net.ServerSocket.<init>(ServerSocket.java:124)
>> > > > > at
>> > > > > org.apache.tomcat.net.DefaultServerSocketFactory.createSocket(
>> > > > > DefaultServerSocketFactory.java:97)
>> > > > > at
>> > > > > org.apache.tomcat.service.PoolTcpEndpoint.startEndpoint(PoolTc
>> > > > > pEndpoint.java:239)
>> > > > > at
>> > > > > org.apache.tomcat.service.PoolTcpConnector.start(PoolTcpConnec
>> > > > > tor.java,
>> > > > > Compiled Code)
>> > > > > at
>> > > > > org.apache.tomcat.core.ContextManager.start(ContextManager.jav
>> > > > > a, Compiled Code)
>> > > > > at
>> > > org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:202)
>> > > > > at org.apache.tomcat.startup.Tomcat.main(Tomcat.java:235)
>> > > > >
>> > > > > I'm running Tomcat on port 8080. After I receive the above
>> > > > > error, a netstat
>> > > > > -a yields:
>> > > > >
>> > > > > TCP cx628443-b:8007 0.0.0.0:0 LISTENING
>> > > > > TCP cx628443-b:8007 0.0.0.0:0 LISTENING
>> > > > > TCP cx628443-b:8080 0.0.0.0:0 LISTENING
>> > > > > TCP cx628443-b:8080 0.0.0.0:0 LISTENING
>> > > > >
>> > > > > So, for some reason, stopping Tomcat does not free up the
>> > > > > port. I must then
>> > > > > reboot my machine to run Tomcat again. I'm using Tomcat 3.2.1
>> > > > > and Classic
>> > > > > VM (build JDK-1.2.2-001, native threads, symcjit).
>> > > > >
>> > > > > Ideally, I'd like to fix the problem, however, I'm also
>> > > > > interested in any
>> > > > > solution that doesn't require rebooting my machine. I'll be
>> > > > > switching to a
>> > > > > Linux-Tomcat platform soon, but need a solution for the meantime.
>> > > > >
>> > > > > Thanks,
>> > > > >
>> > > > > Steve
>> > > > >
>> > >
When to start a new JVM?
Posted by Bora Paksoy <b_...@yahoo.com>.
Hi there;
I am actually a java developer who was asked to manage
some Tomcat instance;) Hence, this question may sound
dumb, but excuse my sys-admin skills.
Anyways, I know that you can start multiple-jvms and
even different instances on different machines, but I
was wondering how people decide when to start a new
JVM? I mean, when do you know that current jvm is
fully used and that you should start a new one and
balance the load on two? Also, how do you know that
current machine has enough load and can't support any
more requests, and load should be balanced on two
machines? Is there any tool that tells you that one
specific jvm process is fully loaded, likewise is
there any tool that tells you that this machine is
fully loaded and load should be distributed on
different machines ?
Thanks,
Baho.
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