I'm looking for some pointers in diagnosing an issue we're seeing. I'll try to describe:
ActiveMQ version: 5.12.1 OS: Ubuntu Linux 12.04 STOMP clients using Ruby 2.0.0 stomp gem v 1.1.10 We have two queues on a host with 8GiB of RAM and 20GiB of disk space. Under steady-state conditions... Queue A receives 10 to 500,000 byte messages at about 10 per second. There are 10 consumers on this queue, and messages are essentially consumed as fast as they can be produced. Queue B receives 850,000 to 4,000,000 byte messages about 5 per minute. There is 1 consumer on this queue, and messages are essentially consumed within a few seconds of production. Now, when a particular issue arises elsewhere in our system, we need to backfill Queue B with a few thousand messages. We load those in much, much faster than the Queue B consumer can process them. Everything is fine until 1500 or so messages are enqueued. At this point, the consumers on Queue A STOP receiving messages. Queue A producers are still delivering 10 per second, and the Queue B consumer is consuming a message every few seconds. How do we troubleshoot this? I've tried loading Queue B more slowly - the problem still occurs when ActiveMQ hits some memory threshold. The only way to resolve the problem, apparently, is to delete Queue B. (An attempt to "Purge" Queue B from the web interface will result in an OutOfMemory error being returned.) Thanks! -Aaron -- View this message in context: http://activemq.2283324.n4.nabble.com/Consumers-inexplicably-blocked-while-producers-run-fine-Help-tp4710793.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
