Re: [SR-Users] Intermittent error seen when using a python script in kamailio

I am not using Python module myself, although I helped adding Kemi support to it. It is not easy for me to create a testbed and try to reproduce. Maybe you can create a minimal config and a sipp scenario that can reproduce it. That could help the non-python developers to troubleshoot.

Cheers, Daniel

On 01.04.22 15:40, Wojciech Kopciewicz wrote:

Any thoughts on this?

Pozdrawiam / Best regards, Wojtek

On Fri, Feb 25, 2022 at 9:30 AM Wojciech Kopciewicz wojciech.kopciewicz@motorolasolutions.com wrote:

Hi Daniel,

This is still a development setup so the traffic is very small - a
few calls a day.
It seems that the issue can be seen during first calls after some
inactivity.

Pozdrawiam / Best regards,
Wojtek


On Wed, Feb 23, 2022 at 2:11 PM Daniel-Constantin Mierla
<miconda@gmail.com> wrote:

    Hello,

    how often they show up and is there high volume of traffic at
    that moment?

    Cheers,
    Daniel

    On 23.02.22 11:44, Wojciech Kopciewicz wrote:

...

    Hi,

    Yes, those values are hard-coded strings.

    Pozdrawiam / Best regards,
    Wojtek


    On Wed, Feb 23, 2022 at 8:25 AM Daniel-Constantin Mierla
    <miconda@gmail.com> wrote:

        Hello,

        do you check that header_name parameter set for
        KSR.hdr.is_present() is a string value?

        Cheers,
        Daniel

        On 22.02.22 15:36, Wojciech Kopciewicz wrote:

...

        Hi,

        Intermittently we are observing the following error when
        checking if given header is present in SIP INVITE:

        SystemError: returned a result with an error set

        The complete stack trace is (some names redacted):
        11(28) ERROR: {1 195 INVITE
        nMHZDN.10nOIDt4ldOwz5cqz0XnMepA9} app_python3
        [python_support.c:156]: python_handle_exception():
        apy_exec: modify_headers((null)): Unhandled exception in
        the Python code:
        TypeError: an integer is required (got type NoneType)

        The above exception was the direct cause of the
        following exception:

        Traceback (most recent call last):
        File "/etc/kamailio/kamailio.py", line 25, in modify_headers
        self.modify_header("SomeHeader")
        File "/etc/kamailio/kamailio.py", line 29, in modify_header
        present = KSR.hdr.is_present(header_name)
        SystemError: returned a result with an error set

        Kamailio version (kamailio -v output):

        version: kamailio 5.4.6 (x86_64/linux)

        flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
        USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK,
        SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC,
        DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
        USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
        USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
        ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144,
        MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
        poll method support: poll, epoll_lt, epoll_et, sigio_rt,
        select.
        id: unknown
        compiled with gcc 8.3.0

        Operation system: Linux kamailio-5c7484c74d-vhhr8
        5.4.0-1056-azure #58~18.04.1-Ubuntu SMP Wed Jul 28
        23:14:18 UTC 2021 x86_64 GNU/Linux 

        Are you able to help me find the root cause of this issue?

        Pozdrawiam / Best regards,
        Wojtek

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