12 Jul
2024
12 Jul
'24
3:21 p.m.
Hi,
I've found the cause of this error. It only happens when the call into Kamailio KSR
takes more time than the threshold set in 'latency_limit_action' of the main
config file. In my case, the value is set to 100000 and I can trigger the issue by
calling tls.reload through KSR.jsonrpc.exec(..) as follows:
jsreload = dict()
jsreload["jsonrpc"] = "2.0"
jsreload["method"] = "tls.reload"
jsreload["id"] = 1
KSR.jsonrpcs.exec(json.dumps(jsreload))
The problem is caused by a bug in the app_python3 module. In file apy_kemi.c, the code
that prints the message indicating the threshold has been exceeded is causing a TypeError
exception while trying to get the co_filename and co_name values from the python
interpreter.
To do so it uses PyBytes_AsString , which expects a Bytes value but receives a Unicode
value, thus causing the TypeError exception.
The fix is to use PyUnicode_AsUTF8 instead. I will by writing all the details in a bug
report. With the fix in place, we get this:
45(329) INFO: app_python3 [apy_kemi.c:377]: sr_apy_kemi_exec_func(): alert - action
KSR.jsonrpcs.exec(...) took too long [693547 ms] (file:/etc/kamailio/kamailio.py
func:ksr_rtimer_dodebug line:507)
instead of Null values for 'file:' and 'func:'. Plus, no more TypeError
exception.
Cheers,
Michel Pelletier
________________________________
From: Michel Pelletier via sr-users <sr-users(a)lists.kamailio.org>
Sent: Thursday, July 11, 2024 12:00 PM
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc: Michel Pelletier <michelpelletier07(a)gmail.com>
Subject: [SR-Users] Kemi Python3 throws a TypeError
Hello,
Please help. I am using Kemi with the python3 module. I get random TypeError exceptions
thrown within the Kamailio code.
For example I have the following code:
event = str(KSR.pv.get("$hdr(Event)"))
log.logInfo(
"KamailioStateful.ksr_request_route_loopback(): " +
"Passing the request to the presence " +
"publish handler for event: " + event
)
rc = KSR.presence.handle_publish()
if rc != 1:
log.logError(
"KamailioStateful.ksr_request_route_loopback(): " +
"The presence publish handler returned " +
"an error code: " + str(rc)
)
This is what I see in the logs:
21(120) ERROR: PY3 {PUBLISH}: app_python3 [python_support.c:167]:
python_handle_exception(): apy_exec: ksr_request_route((null)): Unhandled exception in the
Python code:
TypeError: expected bytes, str found
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/etc/kamailio/kamailio.py", line 91, in ksr_request_route
return ksf.ksr_request_route(msg, "Loopback")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/etc/kamailio/kamailio_stateful.py", line 100, in ksr_request_route
return self.ksr_request_route_loopback(msg)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/etc/kamailio/kamailio_stateful.py", line 240, in
ksr_request_route_loopback
rc = KSR.presence.handle_publish()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SystemError: <built-in function handle_publish> returned a result with an exception
set
If I put the offending line within a Try/Except it hides it but I would rather not see it
not happen at all. Any Kemi Python3 users experiencing something similar? What could be
causing this?
Regards,
Michel Pelletier