[SM-512] sendsync from a service to another service seems to cause a deadlock under load

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 3.0-M2
• Fix Version/s: 3.0

Environment

Windows 2003, Intel 2.8 xeon processor. Java 1.5 3.0-M2

• Assignee: Guillaume Nodet
• Reporter: anand somani
• Created: 04/Aug/06 18:39
• Updated: 03/Jul/08 11:05
• Resolved: 08/Aug/06 09:04

Description

We have 2 services A and B. A makes sync requests to B. We have a JMS client that feeds requests to A and that triggers a sync request to B. We are trying to push some 5000 requests (not sequential). Now
With st flow - A gets all the responses from B and we are good
with Seda flow - A gets some responses from B (sometimes none) and then all the threads are blocked (seen using JMX) on syncsend(), looks like B has no threads to service requests.
with JMS flow ( A and B on different VMs), we see the similar behavior as with seda flow

With async requests everything works just fine. We have tried increasing seda capacity and workmanager thread count, that did not help. I am attaching service A and B code along with configuration files

Also it would be nice to have all the tunable features documented with some explaination somewhere ( I could not find it anywhere)