We've got a situation (I'm still far from up to speed on any details) involving memory-mapped STMFs in Java on a V7 customer box.

I'm not yet privy to the details of what we're doing, but we're trying to offload a cache in a Tomcat webapp context, and it's throwing some really weird exceptions at us (but it's apparently working fine on other hardware platforms, and on the same V7 box if we're running a test program from QShell. Among other things, it's giving out-of-memory exceptions, even though there's plenty of heap space (and indeed, the Tomcat server is running with -Xmx3072m, in a subsystem with a 3G private memory pool), and the Tomcat server itself, and another context running in it, aren't being affected.

As my colleague was describing what he was doing, I began to wonder, could this somehow be getting into a fight with single-level store?

Does anybody here have the slightest idea what could be going on here?


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