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+1  Q: 

Google App Engine - "java.lang.IllegalArgumentException: datastore transaction or write too big."

When calling DatastoreService.delete(keys) with 400 keys, I'm get this exception:

java.lang.IllegalArgumentException: datastore transaction or write too big.

I thought the limit on batch deletes was 500 so I am well under the limit. Am I missing something here?

Thanks, Keyur

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