i did an strace on

/usr/java/jre1.6.0_06/bin/java -Djava.security.manager -Djava.security.policy=conf/red5.policy -cp red5.jar:conf: org.red5.server.Standalone

and i found a lot of:

28676 futex(0x2aaad4914988, FUTEX_WAKE, 1) = 0
28676 clock_gettime(CLOCK_MONOTONIC, {973105, 687668663}) = 0
28676 clock_gettime(CLOCK_MONOTONIC, {973105, 687727770}) = 0
28676 clock_gettime(CLOCK_MONOTONIC, {973105, 687777928}) = 0
28676 clock_gettime(CLOCK_REALTIME, {1209771125, 310684373}) = 0
28676 see more futex(0x2aaad4f01cd4, FUTEX_WAIT, 1, {0, 9975627}) = -1 ETIMEDOUT (Connection timed out)

uhm...interesting 3 clock_gettimes and then a ETIMEOUT...