[GERONIMO-5668] Use fewer acceptor threads for Jetty

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.1
• Fix Version/s: 2.2.1, 2.2.2
• Component/s: Jetty
• Security Level: public (Regular issues)

Environment

Only tested on OS X 1.6 with Java 1.6

• Patch Info: Patch Available
• Assignee: Lin Quan Jiang
• Reporter: Trygve Sanne Hardersen
• Created: 28/Oct/10 09:04
• Updated: 01/Dec/10 06:10
• Resolved: 01/Dec/10 06:10

Description

Geronimo applies the maxThreads parameter as the number of acceptor threads in Jetty, with a default value of 50. With newer versions (7.2.0) of Jetty this gives the following warning during startup:

1. Acceptors should be <=2*availableProcessors

Server shutdowns are also very slow, it takes about 1 second to stop each acceptor thread.

The attached patch sets the number of acceptor threads to 2 per connector (HTTP, HTTPS and AJP), and exposes this and the acceptor queue size (50) as a parameter in config-substitutions.properties.