Home/ Questions/How to fix oserror: [winerror 10038] an operation was attempted on something that is not a socket?
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Annabel Jacobi
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Asked: 2022-07-22T10:08:02+00:00 In:

How to fix oserror: [winerror 10038] an operation was attempted on something that is not a socket?

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I got the warning “oserror: [winerror 10038] an operation was attempted on something that is not a socket” with my method impacted by the original code (version 9.76.01) below:

def run(self):
try:
buf = b""
while self.conn.isConnected():

data = self.conn.recvMsg()
logger.debug("reader loop, recvd size %d", len(data))
buf += data

while len(buf) > 0:
(size, msg, buf) = comm.read_msg(buf)
#logger.debug("resp %s", buf.decode('ascii'))
logger.debug("size:%d msg.size:%d msg:|%s| buf:%s|", size,
len(msg), buf, "|")

if msg:
self.msg_queue.put(msg)
else:
logger.debug("more incoming packet(s) are needed ")
break

logger.debug("EReader thread finished")
except:
logger.exception('unhandled exception in EReader thread')

I don’t know the reason that occurs this issue. Please help me fix it as soon as possible.

Thanks a lot. I really appreciate you guys’ support.

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1 Answer

  1. Best Answer
    Expert

    The cause:

    On Windows Python, you get the error while executing InteractiveBrokers API’s disconnect():

    The Interactive Brokers API class has a mistake that is the cause of oserror: [winerror 10038] an operation was attempted on something that is not a socket problem.

    Solution: Change C:\TWS API\source\pythonclient\ibapi\reader.py and install new to resolve the issue and prevent an error from being unnecessarily raised:

    To resolve the issue, substitute this code:

    def run(self):
try:
buf = b""
while self.conn.isConnected():

try:
data = self.conn.recvMsg()
logger.debug("reader loop, recvd size %d", len(data))
buf += data

except OSError as err:
#If connection is disconnected, Windows will generate error 10038
if err.errno == 10038:

#Wait up to 1 second for disconnect confirmation
waitUntil = time.time() + 1
while time.time() < waitUntil:
if not self.conn.isConnected():
break
time.sleep(.1)

if not self.conn.isConnected():
logger.debug("Ignoring OSError: {0}".format(err))
break

#Disconnect wasn't received or error != 10038
raise

while len(buf) > 0:
(size, msg, buf) = comm.read_msg(buf)
#logger.debug("resp %s", buf.decode('ascii'))
logger.debug("size:%d msg.size:%d msg:|%s| buf:%s|", size,
len(msg), buf, "|")

if msg:
self.msg_queue.put(msg)
else:
logger.debug("more incoming packet(s) are needed ")
break

logger.debug("EReader thread finished")
except:
logger.exception('unhandled exception in EReader thread')
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