Github user andrewor14 commented on the pull request: https://github.com/apache/spark/pull/1259#issuecomment-48848292 Hi @rxin, I took a pass over the patch and the changes mostly look good. On a higher level point, I notice that we log this pattern `0.0:4.0 (TID 4 ...)` quite often, where the task ID is logged twice. If the user has no idea what the colon notation means, they might try to (as I did) interpret `4.0` as something else other than the task ID because `TID 4` is already there.
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