possible bug in awsiotsdk python ?

I have a function:

def get_thing_shadow_request(thingName, shadowName):
try:

    ipc_client_shadow       = awsiot.greengrasscoreipc.connect()  
    get_thing_shadow_request = GetThingShadowRequest()  
    get_thing_shadow_request.thing_name = thingName  
    get_thing_shadow_request.shadow_name = shadowName  
    op = ipc_client_shadow.new_get_thing_shadow()  
    op.activate(get_thing_shadow_request)  
    fut = op.get_response()  
    result = fut.result(10)  
    return result.payload  

except BaseException as err:  
    g_logger.error("EXCEPTION get_thing_shadow_request  thingname {}, shadowname {} error {} ".format(thingName, shadowName, err))  
    return ""  

that i call multiple times and it works fine. however on the 1023rd call ( this seems awfully close to a 1024 magic number btw) of this function it stops working with the following error:

EXCEPTION get_thing_shadow_request count:1025, thingname smartdvr-1423019132001, shadowname streamcontrol error 46 (AWS_ERROR_SYS_CALL_FAILURE): System call failure

one other note is that 1 out of 3 of my calls is asking for a shadow that doesn't exist (i'm checking to see if it exists and if it fails i know it doesn't)

i can't see anything unusual in greengrass.log

Edited by: clogwog on Dec 2, 2021 12:14 PM