Q How to resolve controller.execute() error : One or more nodes failed during Step Search.

[chunyj]

im following the tutorial on the git page to run the SourcererCC clone detection on sample projects provided
the error occurs when I run the controller.py file
the error code shows

search will be carried out with 1 nodes
loading previous run state
previous run state 5
current state: 1
flushing current state 1
current state: 2
flushing current state 2
current state: 3
flushing current state 3
current state: 4
flushing current state 4
current state: 5
flushing current state 5
running new command /Users/yongjinc/Desktop/SourcererCC-master/clone-detector/runnodes.sh search 1
Traceback (most recent call last):
File "controller.py", line 180, in
controller.execute()
File "controller.py", line 133, in execute
Check Log_search.log for more details. grep for FAILED in the log file")
main.ScriptControllerException: One or more nodes failed during Step Search.
Check Log_search.log for more details. grep for FAILED in the log file