COPY runs before all files are copied to S3

[mklaber]

Appears to be a race condition under which the COPY command is looking for files in an S3 bucket that don't yet exist. Re-running the query works.

Status: Failed 

 Error in SQL: The specified S3 prefix 'parsed-names/20160209-201927/output' does not exist 
DETAIL: 
 ----------------------------------------------- 
error: The specified S3 prefix 'parsed-names/20160209-201927/output' does not exist code: 8001 context:  
query: 3525417 
location: s3_utility.cpp:541 
process: padbmaster [pid=14844] -----------------------------------------------

Possible solution? Put an arbitrary "WAIT" command?