> Any idea why this would occur with a Join query?
I'd guess not that you have a large amount of data causing it, but a deep object graph that you're deserializing. Have you tried Kryo? Have you tried the -Xss Java option?
> Any idea why this would occur with a Join query?
I'd guess not that you have a large amount of data causing it, but a deep object graph that you're deserializing. Have you tried Kryo? Have you tried the -Xss Java option?