Github user GenTang commented on the pull request: https://github.com/apache/spark/pull/3986#issuecomment-69456767 As all the exception about ec2 will throw out an EC2ResponseError exception, we use error_code to identify the specific error of instance not existing. If EC2 returns instance not found exception, we wait a short time to relaunch the request. Otherwise, throw out the same error.
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