Hello, I have deployed 3 tomcat6.0.29 webapps, each of which exposes a webservice, and am using apache2.2 and mod_jk-1.2.31-httpd-2.2.3.so to cluster them - a performance exercise. 1 webapp as well as apache is running on my dev box, and 2 other webapps are running on the dev boxes of my colleagues sitting next to me. I can connect to each webapp (both webapp and webservice) individually, and I can connect to them via my apache as well. (I know that the roundrobin is working, I have a test.jsp that tells me what machine I am currently talking to.) Everything appears to be running fine. I can do individual webservice load tests on each machine individually, without any problems, nothing bad in the logs, expected results, etc. However, when I do a loadtest on the apache port, the 2 remote tomcats start having .... SEVERE: Invalid message recieved with signature 28276 14-Jan-2011 15:18:45 org.apache.coyote.ajp.AjpMessage processHeader SEVERE: Invalid message recieved with signature 28276 14-Jan-2011 15:18:45 org.apache.coyote.ajp.AjpMessage processHeader SEVERE: Invalid message recieved with signature 28276 14-Jan-2011 15:18:48 org.apache.coyote.ajp.AjpMessage processHeader SEVERE: Invalid message recieved with signature 28276 .... the above dumps in their logs, load test throughput goes down, and the load test reports errors. The number of errors the loadtest reports matches the number of the " SEVERE: Invalid message recieved with signature 28276" lines I get on the 2 remote machines. I am ready to post my config if need be, but wanted to know if someone has come across this before? I can find some reference in the archives which suggests I should update tomcat/apache/java etc but I have the latest versions already. Thank you, Lukas p.s. Apologies if the format of the message is incorrect, this is my first post to this forum. ______________________________________________ Lukas Sklenar t +44 (0)1483 817132 | m +44 (0) 7786 374324 www.detica.com Please consider the environment before printing this email. This message should be regarded as confidential. If you have received this email in error please notify the sender and destroy it immediately. Statements of intent shall only become binding when confirmed in hard copy by an authorised signatory. The contents of this email may relate to dealings with other companies within the Detica Limited group of companies. Detica Limited is registered in England under No: 1337451. Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, England. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx