It's a Flex/Java Application which is running on the server.
The behaviour is reproducable. It allways accures when the programm generates an excel export from the sql-database.
I allready studied the log file (as good as I could) but the only remark i found was not an errer but a warning:
2013-04-09 09:25:20,010 INFO [STDOUT] (http-0.0.0.0-8080-1) File name: Production sheet_all_2013-03-22_v1 Reports Type: Production sheet
I don't think that this is the reason for the timeout.
2013-04-09 09:25:20,026 WARN [org.jboss.ejb3.interceptors.aop.InterceptorsFactory] (http-0.0.0.0-8080-1) EJBTHREE-1246: Do not use InterceptorsFactory with a ManagedObjectAdvisor, InterceptorRegistry should be used via the bean container
2013-04-09 09:25:20,026 WARN [org.jboss.ejb3.interceptors.aop.InterceptorsFactory] (http-0.0.0.0-8080-1) EJBTHREE-1246: Do not use InterceptorsFactory with a ManagedObjectAdvisor, InterceptorRegistry should be used via the bean container