Operating system and version? Java version? Tomcat version: 6.0.32 - thanks for this. Java or native connector? Pure Tomcat or something else in front? (I'm assuming pure Tomcat from what else you say)
- Peter On 25 May 2011 12:51, Asankha C. Perera <asan...@apache.org> wrote: > Hi All > > During some performance tests, we've seen that Tomcat resets TCP > connections under high load. To reproduce this rather consistently, a thread > pool with a maximum of 300 threads could be configured on default Tomcat > 6.0.32, and then 1280 ~ 2560 concurrent user requests simulated from a > different machine over a real NW interface. I assume this could be > reproduced with proportionately smaller numbers for both as well. The > implementation uses a Xfire soap service. > > Tomcat refusing connections, or taking longer to accept new connections, or > taking longer to reply (causing a socket timeout) can be expected under such > load - but what we see are TCP resets of connections to which a client has > already sent a full HTTP request. > > Is this the default behavior of Tomcat? The problem this presents is that > the client cannot safely fail over to another instance, unlike with a > refused connection or a connect timeout (i.e. delay in accepting) > > thanks > asankha > > > No. Time Source Destination Protocol > Src Port Dst Port Info > 389961 37.056567 10.77.69.8 10.101.29.42 TCP > 9062 8080 9062 > 8080 [SYN] Seq=0 Win=5792 [TCP CHECKSUM INCORRECT] > Len=0 MSS=1460 TSV=363753 TSER=363574 WS=7 > 391297 37.108766 10.101.29.42 10.77.69.8 TCP > 8080 9062 8080 > 9062 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 > MSS=1460 TSV=363383 TSER=363753 WS=7 > 391298 37.108773 10.77.69.8 10.101.29.42 TCP > 9062 8080 9062 > 8080 [ACK] Seq=1 Ack=1 Win=5888 [TCP CHECKSUM > INCORRECT] Len=0 TSV=363758 TSER=363383 > 391893 37.115809 10.77.69.8 10.101.29.42 HTTP > 9062 8080 POST /xfire/xfire-service HTTP/1.1 > 391894 37.115837 10.77.69.8 10.101.29.42 HTTP > 9062 8080 Continuation or non-HTTP traffic[Packet size limited > during capture] > 392677 37.125492 10.101.29.42 10.77.69.8 TCP > 8080 9062 8080 > 9062 [RST] Seq=1 Win=0 Len=0 > > > -- > Asankha C. Perera > AdroitLogic, http://adroitlogic.org > > http://esbmagic.blogspot.com > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
