Berkeley DB Family

Hello,

I've started getting this exception every time I try to open my container. I've not been able to find exactly what it means.

My database was initially loaded with a bunch of XML documents, and since then I've just been doing queries against it - no inserts, updates or deletions. My query programs have been running fine until yesterday when I encountered this error, and now each time I run I get the error.

So, question one - what would have caused this problem?
Question two - how do I fix it?

Thanks,
Steve

unable to allocate memory for mutex; resize mutex region
Error performing query against productData.dbxml
Message: Error: Not enough space
Database handles still open at environment close
Exception in thread "main" com.sleepycat.dbxml.XmlException: Error: Not enough space, errcode = DATABASE_ERROR
at com.sleepycat.dbxml.dbxml_javaJNI.XmlManager_openContainer__SWIG_2(Native Method)
at com.sleepycat.dbxml.XmlManager.openContainer(XmlManager.java:525)
at com.sleepycat.dbxml.XmlManager.openContainer(XmlManager.java:190)
at dbxml.gettingStarted.simpleProductQuery.main(simpleProductQuery.java:195)