Re: probing tomcat
One simple thing that you could do is create a "ping" servlet which you can request from a remote machine (just a minimal servlet that prints a message). On the remote machine you would probably have a script or monitoring software attempt to grab the URL of the servlet. Although this tells you if Tomcat is running it doesn't tell you about other parts of your application (which you could probably arrange in the ping servlet). -- Mark Castillo [EMAIL PROTECTED] http://www.webFreak.com - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 21, 2001 5:32 AM Subject: probing tomcat > > > Hi, > does anybody know whether there exists a way to probe from a remote computer whether tomcat is still alive ? > > Steven >
Re: JVM and use of memory
Roy, Do you have any output in the logs either from Tomcat or the JVM? -- Mark Castillo [EMAIL PROTECTED] http://www.webFreak.com - Original Message - From: "Roy K. Mayr R." <[EMAIL PROTECTED]> To: "TomcatUser" <[EMAIL PROTECTED]> Sent: Monday, August 20, 2001 2:41 PM Subject: JVM and use of memory > > When I start tomcat, it process use 44M and 16M res. (aprox). > But when I work, and work, and work it process use > 49,52,60,80,100,120 M and crash tomcat !!! > > I have JSP pages that use 8 beans... then memory used it increases more > quicky > > I'm using: > > Tomcat 3.3 > JDK 1.3.1 > Apache 1.3.20 > Solaris 2.8 > > Help me!! > > Thanks. > > > Roy
Re: tomcat crash...
What JVM command line options are you using? Are you using HotSpot? Do you ever see OutOfMemoryException or anything like that? Do you get a HotSpot error that looks something like this?: # # HotSpot Virtual Machine Error : 11 # Error ID : 4F530E43505002CC # Please report this error at # http://java.sun.com/cgi-bin/bugreport.cgi # # Java VM: Java HotSpot(TM) Server VM (1.3.1-b24 mixed mode) # Unexpected Signal : 11 occurred at PC=0x40266D88 -- Mark Castillo [EMAIL PROTECTED] http://www.webFreak.com - Original Message - From: "Roy K. Mayr R." <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, August 20, 2001 11:12 AM Subject: RE: tomcat crash... > I'm using jdk 1.3. > > Yes, before it crashes cpu utilization is very high. Close x-server and > full temporal disk too. > > Roy > >
Re: tomcat crash...
Roy, Which JVM are you using? Before it crashes is CPU utilization very high? -- Mark Castillo [EMAIL PROTECTED] http://www.webFreak.com - Original Message - From: "Roy K. Mayr R." <[EMAIL PROTECTED]> To: "TomcatUser" <[EMAIL PROTECTED]> Sent: Monday, August 20, 2001 10:31 AM Subject: tomcat crash... > Hi, > > I'm using Tomcat 3.3b1 and Apache 1.3.20 on solaris. I work with JSP pages. > > Every day crash tomcat. Server work slow, slow and then crash tomcat > !!! > Many times I found a big big "core" archive > > Other times (many times), I seen the next error: > > > Ajp13Interceptor: Processing connection > org.apache.tomcat.util.net.TcpConnection@453807 - java.net > .SocketException: Connection reset by peer: Connection reset by peer > at java.net.SocketInputStream.socketRead(Native Method) > at java.net.SocketInputStream.read(SocketInputStream.java:86) > at org.apache.tomcat.modules.server.Ajp13.receive(Ajp13.java:647) > at > org.apache.tomcat.modules.server.Ajp13.receiveNextRequest(Ajp13.java:241) > at > org.apache.tomcat.modules.server.Ajp13Request.receiveNextRequest(Ajp13Interc > eptor.java:218) > at > org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Ajp13Int > erceptor.java:153) > at > org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:438) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav > a:505) > at java.lang.Thread.run(Thread.java:484) > > > anyone has any ideas on how to fix this ? > > thanks ! > > Roy Mayr
