[SERVER-20278] filemd5 command hides execution error in some cases - MongoDB

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Steps To Reproduce:

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1. Import a large file with mongofiles.
2. Drop the
{ files_id: 1, n: 1 }
index.
3. Create a
{ files_id: 1 }
index. This will make the planner select this and not fail because table scan is not allowed in filemd5.
4. Call filemd5 on the file.

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1. Import a large file with mongofiles. 2. Drop the { files_id: 1, n: 1 } index. 3. Create a { files_id: 1 } index. This will make the planner select this and not fail because table scan is not allowed in filemd5. 4. Call filemd5 on the file.

When filemd5 command exceeds the sort memory limit, it does not report the error but instead return a result as if the file was empty.

A modified version of the existing gridfs.js is attached.

duplicates

SERVER-13123 All callers of PlanExecutor::getNext need to deal with error returns

related to

SERVER-13123 All callers of PlanExecutor::getNext need to deal with error returns