I turned on reporting ERROR level. After that I saw that SystemLog contain houndreds of following backtraces:

jvm 1 | 2011-08-23 18:13:12,730 ERROR - Error invoking hessian service.
jvm 1 | com.caucho.hessian.client.HessianConnectionException: HessianProxy cannot connect to 'http://192.168.0.1:8811/service/agent
jvm 1 | at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:192)
jvm 1 | at $Proxy46.getSystemAttributes(Unknown Source)
jvm 1 | at com.pmease.quickbuild.grid.DefaultAgentManager.newBuildAgent(DefaultAgentManager.java:177)
jvm 1 | at com.pmease.quickbuild.grid.DefaultAgentManager.buildAgentActive(DefaultAgentManager.java:150)
jvm 1 | at com.pmease.quickbuild.grid.ConnectServlet.connect(ConnectServlet.java:112)
jvm 1 | at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
jvm 1 | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
jvm 1 | at java.lang.reflect.Method.invoke(Method.java:597)
jvm 1 | at com.caucho.hessian.server.HessianSkeleton.invoke(HessianSkeleton.java:192)
jvm 1 | at com.caucho.hessian.server.HessianSkeleton.invoke(HessianSkeleton.java:110)
jvm 1 | at com.caucho.hessian.server.HessianServlet.service(HessianServlet.java:416)
jvm 1 | at com.pmease.quickbuild.grid.ConnectServlet.service(ConnectServlet.java:58)
jvm 1 | at com.pmease.quickbuild.web.HttpServiceProvider$1$1.service(HttpServiceProvider.java:86)
jvm 1 | at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
jvm 1 | at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111)
jvm 1 | at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:59)
jvm 1 | at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
jvm 1 | at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:318)
jvm 1 | at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
jvm 1 | at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:380)
jvm 1 | at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
jvm 1 | at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
jvm 1 | at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
jvm 1 | at org.mortbay.jetty.Server.handle(Server.java:324)
jvm 1 | at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
jvm 1 | at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
jvm 1 | at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:748)
jvm 1 | at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:213)
jvm 1 | at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
jvm 1 | at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
jvm 1 | at org.mortbay.jetty.security.SslSocketConnector$SslConnection.run(SslSocketConnector.java:636)
jvm 1 | at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
jvm 1 | Caused by: java.io.FileNotFoundException: http://192.168.0.1:8811/service/agent
jvm 1 | at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
jvm 1 | at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
jvm 1 | at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
jvm 1 | at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
jvm 1 | at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1368)
jvm 1 | at java.security.AccessController.doPrivileged(Native Method)
jvm 1 | at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1362)
jvm 1 | at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1016)
jvm 1 | at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:177)
jvm 1 | ... 31 more
jvm 1 | Caused by: java.io.FileNotFoundException: http://192.168.0.1:8811/service/agent
jvm 1 | at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1311)
jvm 1 | at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:373)
jvm 1 | at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:166)
jvm 1 | ... 31 more


I found topic http://forum.pmease.com/viewtopic.php?f=1&t=1732 but I can run

$telnet 192.168.0.1 8811
Trying 192.168.0.1...
Connected to 192.168.0.1.
Escape character is '^]'.

Server under this IP address contain QB server - there is no agent.

node.properties file:
sslPort=8443
port=8811
keystorePassword=***
keystore=/path/to/keystore
privateKeyPassword=***
performance=20