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[ecf-dev] zookeeper discovery comes and goes
- From: Bryan Hunt <bhunt@xxxxxxx>
- Date: Tue, 12 Oct 2010 09:56:26 -0500
- Delivered-to: email@example.com
I'm seeing a strange problem with zookeeper service discovery. I've been experimenting with YourKit and noticed a ConcurrentModificationException as reported here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=327170
When I went to capture a better stack trace, I noticed that when I remotely connected with YourKit, the client reported zookeeper undiscovered one of my 4 remote services. When I disconnect and reconnect YourKit, the client reports that zookeeper discovers 4 remote services.
This problem appears repeatable. The client and all 4 remote services are running on the same machine. Each remote service is running in it's own JVM. Any ideas on what is going on, or suggestions for tracking down the problem? Is there by chance some sort of very short keepalive that might be having problems if there were a network delay or thread delay when YourKit connects to the client JVM?