OSError: in error.log file

[Wolli01]

I have created an error.log file to find errors.
Enclosed is an excerpt of the file and below that the Main-File line.
Who can help more and tell what these error messages mean and how I can avoid them?

25.12.2019;05:10:21
Traceback (most recent call last):
File "main.py", line 790, in <module>
File "/flash/lib/urequests.py", line 116, in post
return request("POST", url, **kw)
File "/flash/lib/urequests.py", line 102, in request
raise
File "/flash/lib/urequests.py", line 60, in request
s.connect(ai[-1])
OSError: [Errno 113] EHOSTUNREACH

Main Zeile:
res = urequests.post(url, data=json.dumps(userdata))

25.12.2019;05:21:30
Traceback (most recent call last):
File "main.py", line 270, in <module>
File "/flash/lib/urequests.py", line 113, in get
return request("GET", url, **kw)
File "/flash/lib/urequests.py", line 102, in request
raise
File "/flash/lib/urequests.py", line 62, in request
s = ussl.wrap_socket(s, server_hostname=host)
OSError: [Errno -26624] MBEDTLS_ERR_SSL_TIMEOUT

Main Zeile:
res = urequests.get(settings.Gateway+'onlinesettings.txt')

25.12.2019;05:44:25
Traceback (most recent call last):
File "main.py", line 296, in <module>
File "/flash/lib/urequests.py", line 113, in get
File "/flash/lib/urequests.py", line 102, in request
File "/flash/lib/urequests.py", line 62, in request
OSError: [Errno -26624] MBEDTLS_ERR_SSL_TIMEOUT

Main Zeile:
res3 = urequests.get(settings.Gateway+'onoff.txt')

25.12.2019;05:47:11
Traceback (most recent call last):
File "main.py", line 790, in <module>
File "/flash/lib/urequests.py", line 116, in post
return request("POST", url, **kw)
File "/flash/lib/urequests.py", line 102, in request
raise
File "/flash/lib/urequests.py", line 62, in request
s = ussl.wrap_socket(s, server_hostname=host)
OSError: [Errno -26624] MBEDTLS_ERR_SSL_TIMEOUT

Main Zeile:
res = urequests.post(url, data=json.dumps(userdata))

[svonbentzel]

@Wolli01

Hello, can you share your code to generate this log file? I try it a few times and don’t get it :-(

Please 🥺

[Wolli01]

@svonbentzel
Yes, please.

try: # Ab hier beginnt die Fehlerüberwachung

#Code........................

# Fehler abfangen und in die error.log speichern------------------------------
except Exception as e:
    # Fehler Lampe in Rot anzeigen!
    pycom.rgbled(0xFF0000) #Rot
    # Fehler Lampe in Rot anzeigen!
    print("Fehlermeldung")
    print(e)
    # Fehlerdatei erstellen
    import sys 
    with open ('/sd/error.log', 'a') as f: 
    #Fehlerbeschreibung--------------------
        f.write(str(LogDateTime) + "\n")           
        sys.print_exception(e, f)
        f.write("\n")         
    #Fehlerbeschreibung--------------------

    time.sleep(10)
    machine.reset() # Neustarten
    #machine.deepsleep (1000)

[svonbentzel]

Awesome ! Many thanks 😊

[jcaron]

@Wolli01 I believe the errors are self-explanatory.

• The first one is “host unreachable”, which points to a network issue

• The other one are timeouts during the TLS negotiation. That’s again most likely a network issue.

Wireless communication is subject to all kinds of issues which makes it not 100% reliable, this is to be expected and managed. When an error occurs, you should retry, either right away (usually with a slight pause which increases each time, a random offset, and a limit to the number of retried), or through some queuing mechanism. The details depend a lot on how important the data is, what kind of delay you can accept, the frequency and size of the transmissions, your dependence on battery, and so on.

[Wolli01]

@jcaron Many thanks for your info