Shared Filesystem Master Slave: missing messages
------------------------------------------------ Key: AMQ-2149
URL: Project: ActiveMQ Issue Type: Bug Affects Versions: 5.2.0
Environment: Ubuntu Linux 8.10 AMD64, Sun JDK Reporter: Aaron
Riekenberg I'm finding occasionally messages are delivered out-
of-order in a shared filesystem master slave setup when the
master fails and the slave takes over. I'm running a simple test
on one physical machine where the shared filesystem is on a
single disk (no SAN currently involved). I'm attaching a shell
script ( that starts a master and slave broker in the same
directory, sleeps 20 seconds, kills the master, sleeps 20
seconds, starts a new slave, sleeps 20 seconds, kills the
master, etc. Also attached is a small java test program ( The
program starts 10 JMS senders that send 75kb text messages every
25 ms to unique queues. These messages contain a sequence number
header (a long). The program also starts 10 receivers (1 for
each queue) that keep track of the next expected