Load test fails with timeout error

======== Created NYM request...
_indy_loop_callback: Function returned b'{"result":{"identifier":"Th7MpTaRZVRYnPiabds81Y","seqNo":69157,"signature":"uS7ex9tf1B5XKGgYX7on9YBqfMPdxvpKio2kiibpd3
GmJuqbKohbnhPqVoUaNvJZgsyChzdroCqm9uSSXqnEzmq","reqId":1521799295295701355,"dest":"5dTgz9qtfGkMJSziJgR6Xq","auditPath":["DNqmoGGTgpiBBAciPXesQMZrDc869zbHSp3dTU
9CCH96","84y14BEtKJVhvzxk9jcUkShSiLBCQwmLgBHDfSVzq6FF","HXuMghQ8oWzhPY9a1e6zeKDqDh47m4Y74S4XkDNfViu4","5zzz6XrU7YDqKfKcir5xcwFSn14Cb8BrSPDknTRBcpTe","FXgXuJuBy
wh96dcSzHBompV5W6mCafbhThpMSRGm19n5","79rKLpcLZWVvnLFPGobnVzUqWSjjNHAGViUwNgQSzdgT"],"txnTime":1521799295,"rootHash":"3aVbsYzWtiN84xYxiaW9kL5ZC14pYUk13Q2ekBC14
Rhn","signatures":null,"type":"1"},"op":"REPLY"}'
 ======== Submitted NYM request
_indy_loop_callback: Function returned (b'APSapr2CQwpa3r8z6WE8CY', b'67jrf4UCHzAenHzyT596gh4C4cTZS92rZFHw5HrqNbmc')
 ======== DID69081: APSapr2CQwpa3r8z6WE8CY 
_indy_loop_callback: Function returned b'{"reqId":1521799296030170739,"identifier":"Th7MpTaRZVRYnPiabds81Y","operation":{"dest":"APSapr2CQwpa3r8z6WE8CY","type"
:"1"},"protocolVersion":1}'
 ======== Created NYM request...
_indy_loop_callback: Function returned b'{"result":{"signatures":null,"signature":"25oUYjwbpNto8bb9dU8NTphd8Y5wvhmUin6AJUWAhXm9eQUtfc9bYC2Vb8vd1q1KVJEQDtYCSqjw
eA8SyxpCAqTq","txnTime":1521799296,"type":"1","reqId":1521799296030170739,"seqNo":69158,"rootHash":"6YSHtbLR4XPqxvdbTW1ybvn353cPKGW3KrwCW8cy98J7","identifier":
"Th7MpTaRZVRYnPiabds81Y","auditPath":["F7NhGpzu3cjjpvCVdp4SodsUkKBKkp1kpDgQHkJxLR4W","DNqmoGGTgpiBBAciPXesQMZrDc869zbHSp3dTU9CCH96","84y14BEtKJVhvzxk9jcUkShSiL
BCQwmLgBHDfSVzq6FF","HXuMghQ8oWzhPY9a1e6zeKDqDh47m4Y74S4XkDNfViu4","5zzz6XrU7YDqKfKcir5xcwFSn14Cb8BrSPDknTRBcpTe","FXgXuJuBywh96dcSzHBompV5W6mCafbhThpMSRGm19n5
","79rKLpcLZWVvnLFPGobnVzUqWSjjNHAGViUwNgQSzdgT"],"dest":"APSapr2CQwpa3r8z6WE8CY"},"op":"REPLY"}'
 ======== Submitted NYM request
_indy_loop_callback: Function returned (b'93BvgPLfWVtWHZEDLTCN3i', b'5P68jssRddPmoHMqNjfcFi6Nr5fE6vK9ZsDKvpo6ny8w')
 ======== DID69082: 93BvgPLfWVtWHZEDLTCN3i 
_indy_loop_callback: Function returned b'{"reqId":1521799296982578065,"identifier":"Th7MpTaRZVRYnPiabds81Y","operation":{"dest":"93BvgPLfWVtWHZEDLTCN3i","type"
:"1"},"protocolVersion":1}'
 ======== Created NYM request...
_indy_loop_callback: Function returned b'{"result":{"signatures":null,"dest":"93BvgPLfWVtWHZEDLTCN3i","txnTime":1521799300,"auditPath":["AXPu3KeHaa4cNFSL5kG7mG
Yubc6ifvRLVo16mmESKDMJ","DNqmoGGTgpiBBAciPXesQMZrDc869zbHSp3dTU9CCH96","84y14BEtKJVhvzxk9jcUkShSiLBCQwmLgBHDfSVzq6FF","HXuMghQ8oWzhPY9a1e6zeKDqDh47m4Y74S4XkDNf
Viu4","5zzz6XrU7YDqKfKcir5xcwFSn14Cb8BrSPDknTRBcpTe","FXgXuJuBywh96dcSzHBompV5W6mCafbhThpMSRGm19n5","79rKLpcLZWVvnLFPGobnVzUqWSjjNHAGViUwNgQSzdgT"],"reqId":152
1799296982578065,"identifier":"Th7MpTaRZVRYnPiabds81Y","type":"1","rootHash":"JAL5PKmUUZ3sDKCEbKrkC1pGpPZAYaQG4xYEdQ6N1mpt","signature":"3FnW8mh6y1AWDTZ861p5tv
LxeapeGbYh9SSKNmpCv8jN6kDmJg2Bm6H5QS8R481nT4czwRXKcXu4U6SXqv4gyY6s","seqNo":69159},"op":"REPLY"}'
 ======== Submitted NYM request
_indy_loop_callback: Function returned (b'5Hi3oGkLzBxMTeURecMZJF', b'3LZ9DJdtzHYx1moW6Q251BcbXruCSnXLZ8UttmF3TaGK')
 ======== DID69083: 5Hi3oGkLzBxMTeURecMZJF 
_indy_loop_callback: Function returned b'{"reqId":1521799302157613423,"identifier":"Th7MpTaRZVRYnPiabds81Y","operation":{"dest":"5Hi3oGkLzBxMTeURecMZJF","type"
:"1"},"protocolVersion":1}'
 ======== Created NYM request...
_indy_loop_callback: Function returned error 307
Exception in callback _indy_loop_callback(207253, 307, b'') at /usr/local/lib/python3.5/dist-packages/indy/libindy.py:62
handle: <Handle _indy_loop_callback(207253, 307, b'') at /usr/local/lib/python3.5/dist-packages/indy/libindy.py:62>
Traceback (most recent call last):
 File "/usr/lib/python3.5/asyncio/events.py", line 125, in _run
 self._callback(*self._args)
 File "/usr/local/lib/python3.5/dist-packages/indy/libindy.py", line 70, in _indy_loop_callback
 future.set_exception(IndyError(ErrorCode(err)))
 File "/usr/lib/python3.5/enum.py", line 241, in __call__
 return cls.__new__(cls, value)
 File "/usr/lib/python3.5/enum.py", line 476, in __new__
 raise ValueError("%r is not a valid %s" % (value, cls.__name__))
ValueError: 307 is not a valid ErrorCode
^CTraceback (most recent call last):
 File "Perf_Add_nyms.py", line 204, in <module>
 loop.run_until_complete(add_nyms(results.p, results.n, results.i, results.s))
 File "/usr/lib/python3.5/asyncio/base_events.py", line 375, in run_until_complete
 self.run_forever()
 File "/usr/lib/python3.5/asyncio/base_events.py", line 345, in run_forever
 self._run_once()
 File "/usr/lib/python3.5/asyncio/base_events.py", line 1276, in _run_once
 event_list = self._selector.select(timeout)
 File "/usr/lib/python3.5/selectors.py", line 441, in select
 fd_event_list = self._epoll.poll(timeout, max_ev)
KeyboardInterrupt