Why Am I Getting `java.util.ConcurrentModificationException` Exceptions?

Table of Contents

1. Overview
   • Tested Configurations

Overview

As of this writing, Adobe ColdFusion (9.0.1 with hot fix installed) Server Monitor appears to have a bug, when the memory tracking is enabled from within the server monitor. As load to your application increases, java.util.ConcurrentModificationException may occur which possibly reference many Mach-II components as the exception source. This issue can be fixed by simply turning off the memory tracking from the server monitor.

Tested Configurations

• ACF 9.0.1, CentOS, Apache
• Please add your configuration if you experience this issue on ACF9

More References

• ACF bug 76714
• Mach-II Dev List discussion regarding this issue