Trouble debugging Java in Eclipse Galileo - appears to be in infinite loop

The user is on JDK6 u 18 with the latest Eclipse, and there appears to be an issue where Eclipse can't step through the debugger as it would normally. Instead, the debugger is 开发者_如何学Crapidly listing and delisting threads from what it looks like at the very bottom of the debug tree.

Has anyone seen this before?

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At least check with

1. other version of Eclipse
2. other JDK/SDK

first, to see how Eclipse and the JVM react to the program in the debugger.

What does "can't step through the debugger" mean? It hangs, it is slow, the refresh of the thread list is annoying...? Is your program rapidly creating and destroying thousands of threads?