SO: cancel dust order + increase opposite = race condition #587
Description
Because of ops bundling the strategy tries to cancel an order while allocate_asset('base') and tries to increase the same order when running allocate_asset('quote'). This is a rare condition, but still possible, good solution would be prevent it.
2019-05-12 18:31:17,992 (staggered_orders:825) - worker4 - INFO - Cancelling dust order at opposite side, placing closer buy order
2019-05-12 18:31:19,363 (staggered_orders:1439) - worker4 - INFO - Placing closer buy order
2019-05-12 18:31:19,363 (base:1126) - worker4 - INFO - Placing a buy order with 0.00012990 RUDEX.BTC @ 0.00000046
2019-05-12 18:31:19,634 (staggered_orders:916) - worker4 - INFO - Increasing sell order at price 0.00000052 from 248.536 to 285.816 RUDEX.GOLOS
2019-05-12 18:31:19,904 (base:1182) - worker4 - INFO - Placing a sell order with 285.816 RUDEX.GOLOS @ 0.00000052
2019-05-12 18:31:20,716 (staggered_orders:241) - worker4 - ERROR - Got exception during broadcasting trx:
Traceback (most recent call last):
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/grapheneapi/api.py", line 168, in func
r = func(*args, **kwargs)
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/grapheneapi/rpc.py", line 136, in method
message = self.parse_response(r)
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/grapheneapi/rpc.py", line 104, in parse_response
raise RPCError(ret["error"]["message"])
grapheneapi.exceptions.RPCError: Assert Exception: maybe_found != nullptr: Unable to find Object 1.7.358450585
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/vvk/devel/DEXBot-prod/dexbot/strategies/staggered_orders.py", line 236, in maintain_strategy
self.execute()
File "/home/vvk/devel/DEXBot-prod/dexbot/strategies/base.py", line 987, in execute
r = self.bitshares.txbuffer.broadcast()
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/bitshares-0.2.1-py3.6.egg/bitshares/transactionbuilder.py", line 424, in broadcast
raise e
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/bitshares-0.2.1-py3.6.egg/bitshares/transactionbuilder.py", line 418, in broadcast
ret, api="network_broadcast")
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/grapheneapi/api.py", line 176, in func
self.post_process_exception(e)
File "/home/vvk/.local/share/virtualenvs/DEXBot-prod-N9mtHQyI/lib/python3.6/site-packages/bitshares-0.2.1-py3.6.egg/bitsharesapi/bitsharesnoderpc.py", line 19, in post_process_exception
raise exceptions.UnhandledRPCError(msg)
bitsharesapi.exceptions.UnhandledRPCError: Assert Exception: maybe_found != nullptr: Unable to find Object 1.7.358450585