There are lots of solutions for stuff like this. You can get complicated or very simple. The simple answer is create a common 0 byte file when writing to the file and delete it when you are finished. Simply check for the existence of the file.
A more complete solution would be to use an ejb or XML-RPC. XML-RPC is much simpler than an ejb. This would give you a 3rd JVM for common functionality across you application. You may not need to go here. You just need to evaluate how much time you want to spend ( and money ) to create a solution. -----Original Message----- From: Rastislav Vasil [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 19, 2003 10:10 AM To: [EMAIL PROTECTED] Subject: RE: Tomcat 4 load balancing Hi, I' sorry, my mystake - lb is a type of the worker, while it's name is loadbalancer, I changed following: default.worker=lb --> default.worker=loadbalancer worker.list=lb --> worker.list=loadbalancer Now it works, but I have a question for one of my next steps: For some operations that write to a file I used to use a SYNCHRONIZED block of code to be sure to have only one user writing to the file. Probably that won't work when using 2 Tomcat instances to write to the same file - am I right? What is the solution/practise here? Thanks, Rasto -----Original Message----- From: Rastislav Vasil Sent: Wednesday, March 19, 2003 3:58 PM To: '[EMAIL PROTECTED]' Subject: Tomcat 4 load balancing Hi all, I'm trying to configure 2 Tomcat (4.1.12) instances on different hosts to serve under single IIS 5 web server. I defined 2 workers uriworkermap.properties: ########### default.worker=lb /examples=$(default.worker) /examples/*=$(default.worker) workers.properties: ######################### workers.tomcat_home=C:\Tomcat4.1 workers.java_home=C:\jdk1.3.0_01 worker.list=lb worker.w1.port=8009 worker.w1.host=localhost worker.w1.type=ajp13 worker.w2.port=8009 worker.w2.host=host2 worker.w2.type=ajp13 worker.w1.lbfactor=1 worker.w2.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balanced_workers=w1, w2 ############################### I get The page cannot be displayed for http://localhost/examples I get following in isapi.log file: [Wed Mar 19 15:47:10 2003] [jk_connect.c (143)]: jk_open_socket, connect() failed errno = 61 [Wed Mar 19 15:47:10 2003] [jk_ajp12_worker.c (152)]: In jk_endpoint_t::service, Error sd = -1 [Wed Mar 19 15:47:10 2003] [jk_isapi_plugin.c (716)]: HttpExtensionProc error, service() failed What I'm trying to do is to have 2 Tomcats servering Java part of a single application. What I'm not sure is how to map balanced workers to a single url mapping in uriworkermap. props. According docs (http://localhost:8080/tomcat-docs/jk2/jk/workershowto.html) "balanced_workers is a comma separated list of workers that the load balancer need to manage. These workers should not appear in the worker.list property." - ... I don't have then there...- so if I'm balancing workers, should workers.list contain only the name of the load-balancing worker? To what worker(s) should the url mapping be set to? Thanks in advance. Rasto --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
