Cause
PARALLEL_MIN_PERCENT parameter was specified and fewer than the minimum number of slaves were acquired
PARALLEL_MIN_PERCENT parameter was specified and fewer than the minimum number of slaves were acquired
Either reexecute the query with a lower PARALLEL_MIN_PERCENT or wait until some running queries are completed, thus freeing up slaves
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
http://docs.oracle.com/cd/E16655_01/server.121/e17613/parallel005.htm
https://community.oracle.com/message/10891550
https://community.oracle.com/message/10699107
https://community.oracle.com/message/9780857
https://community.oracle.com/message/3502450
https://community.oracle.com/message/3250236
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