Also experiencing this error. When accessing the SWF embedded flash page that opened a RTMP connection to the server the number of file descriptors grows. Each time the page is reloaded, a new file handler is created, however these are never recycled and eventually the application stops working.
/usr/sbin/lsof -p 17168 | grep 'identify protocol'
java 17168 tomcat 6u sock 0,5 1309987 can't identify protocol
java 17168 tomcat 22u sock 0,5 1311215 can't identify protocol
java 17168 tomcat 29u sock 0,5 1311225 can't identify protocol
java 17168 tomcat 30u sock 0,5 1311228 can't identify protocol
java 17168 tomcat 31u sock 0,5 1311231 can't identify protocol
java 17168 tomcat 32u sock 0,5 1311234 can't identify protocol
java 17168 tomcat 33u sock 0,5 1311239 can't identify protocol
java 17168 tomcat 34u sock 0,5 1709638 can't identify protocol
java 17168 tomcat 35u sock 0,5 1311422 can't identify protocol
java 17168 tomcat 36u sock 0,5 1311425 can't identify protocol
java 17168 tomcat 37u sock 0,5 1311428 can't identify protocol
java 17168 tomcat 38u sock 0,5 1311431 can't identify protocol
java 17168 tomcat 39u sock 0,5 1311434 can't identify protocol
java 17168 tomcat 40u sock 0,5 1311437 can't identify protocol
java 17168 tomcat 41u sock 0,5 1311440 can't identify protocol
java 17168 tomcat 42u sock 0,5 1492150 can't identify protocol
java 17168 tomcat 43u sock 0,5 1492155 can't identify protocol
java 17168 tomcat 44u sock 0,5 1493022 can't identify protocol
java 17168 tomcat 45u sock 0,5 1493025 can't identify protocol
java 17168 tomcat 47u sock 0,5 1709754 can't identify protocol
java 17168 tomcat 49u sock 0,5 1709755 can't identify protocol
java 17168 tomcat 50u sock 0,5 1709756 can't identify protocol
java 17168 tomcat 51u sock 0,5 1709772 can't identify protocol
java 17168 tomcat 52u sock 0,5 1709773 can't identify protocol
java 17168 tomcat 53u sock 0,5 1709854 can't identify protocol
java 17168 tomcat 54u sock 0,5 1709856 can't identify protocol
java 17168 tomcat 55u sock 0,5 1709857 can't identify protocol
java 17168 tomcat 56u sock 0,5 1709858 can't identify protocol
java 17168 tomcat 57u sock 0,5 1709859 can't identify protocol
java 17168 tomcat 58u sock 0,5 1709860 can't identify protocol
java 17168 tomcat 59u sock 0,5 1709878 can't identify protocol
java 17168 tomcat 60u sock 0,5 1709881 can't identify prot