The wireless_connection_wpa_n job of checkbox sru process seems to run forever on 16.04 sometimes

[Taihsiang Ho]

Dell Latitude 3330 (CID 201302-12843)
16.04 (kernel 4.4.0-21-generic)

Steps to Reproduce:

1. Install 16.04 on Dell Latitude 3330 (CID 201302-12843) and the associated packages[1] to run certification SRU test.

2. issue "checkbox sru" to run the test.

Expected Result:

The test completes in one hour.

Actual Result:

The test seems to run forever. I watched the process status and got:

root 12761 0.0 0.0 21296 2692 ? S 04:47 0:00 bash -c trap "nmcli con delete id $WPA_N_SSID" EXIT if create_connection wifi $WPA_N_SSID --security=wpa --key=$WPA_N_PSK; then connect
root 12762 0.0 0.3 61644 14672 ? S 04:47 0:00 python3 /tmp/nest-loewmcin.7cb636aab6aaa57ab81bfe26920bc3d6414223b5f1c75c6d4d539913421d5124/create_connection wifi ubuntu-cert-n-wpa --secu
root 12784 0.0 0.2 406980 9428 ? Sl 04:47 0:00 nmcli con up id ubuntu-cert-n-wpa

Process tree view:

ubuntu 1510 0.0 0.0 700692 3060 ? Ssl 04:09 0:00 \_ /usr/lib/gnome-session/gnome-session-binary --session=ubuntu
ubuntu 1702 0.0 0.0 4508 0 ? S 04:09 0:00 | \_ sh -c if [ -e /usr/share/oem-automation/flags/execute-dist-upgrade ]; then sleep 60; sudo apt-get dist-upgrade -y --force-y
ubuntu 2004 1.6 0.5 344380 23340 ? Sl 04:11 1:07 | | \_ /usr/bin/python3 /usr/bin/checkbox sru --check-config
root 12736 0.0 0.9 87268 38104 ? S 04:47 0:01 | | \_ /usr/bin/python3 /usr/bin/plainbox-trusted-launcher-1 --target 7cb636aab6aaa57ab81bfe26920bc3d6414223b5f1c75c6d4d53
root 12761 0.0 0.0 21296 2692 ? S 04:47 0:00 | | \_ bash -c trap "nmcli con delete id $WPA_N_SSID" EXIT if create_connection wifi $WPA_N_SSID --security=wpa --key=
root 12762 0.0 0.3 61644 14672 ? S 04:47 0:00 | | \_ python3 /tmp/nest-loewmcin.7cb636aab6aaa57ab81bfe26920bc3d6414223b5f1c75c6d4d539913421d5124/create_connecti
root 12784 0.0 0.2 406980 9428 ? Sl 04:47 0:00 | | \_ nmcli con up id ubuntu-cert-n-wpa

Reproducing Rate:

4 out of 5

This happens on some machines as well, but has lower reproducing rate.

--------------------------

[1]

ubuntu@201302-12843:~$ dpkg -l *checkbox* *plainbox*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=============================================-===========================-===========================-===============================================================================================
un checkbox <none> <none> (no description available)
ii checkbox-autostart-desktop 0.3+git201705221758+pkg38~u all Automatic system testing for desktop systems
ii checkbox-ci-mailer 0.3+git201705221758+pkg38~u all Automatic system testing CI loop
ii checkbox-converged 1.7.0+git201705221806+pkg14 all testing tool for all Ubuntu devices
ii checkbox-ng 0.33.0+git201705221758+pkg6 all PlainBox based test runner
ii plainbox 0.35.0+git201705221743+pkg6 all toolkit for software and hardware integration testing
ii plainbox-insecure-policy 0.35.0+git201705221743+pkg6 all policykit policy required to use plainbox (insecure version)
ii plainbox-provider-certification-client 0.30.0+201705221818+54~ubun all Client Certification provider for Plainbox
ii plainbox-provider-checkbox 0.36.0+git201705221812+pkg4 amd64 CheckBox provider for PlainBox
ii plainbox-provider-resource-generic 0.32.0+git201705231358+pkg3 amd64 CheckBox generic resource jobs provider
ii plainbox-provider-sru 1.7.0+git201705221838+pkg12 all CheckBox SRU jobs provider
ii plainbox-provider-tpm2 1.3.0+git201705221902+pkg13 all TPM 2.0 provider for PlainBox
un plainbox-secure-policy <none> <none> (no description available)
ii python3-checkbox-ng 0.33.0+git201705221758+pkg6 all PlainBox based test runner (Python 3 library)
ii python3-checkbox-support 0.34.0+git201705231353+pkg5 all collection of Python modules used by PlainBox providers
ii python3-plainbox 0.35.0+git201705221743+pkg6 all toolkit for software and hardware testing (python3 module)

[Taihsiang Ho (tai271828)]

wireless_connection_wpa_n test job is here:

plainbox-provider-checkbox::jobs/wireless.txt.in

plugin: shell
category_id: 2013.com.canonical.plainbox::wireless
id: wireless/wireless_connection_wpa_n
requires:
 device.category == 'WIRELESS'
 environment.ROUTERS == 'multiple'
user: root
environ: WPA_N_SSID WPA_N_PSK
command:
    trap "nmcli con delete id $WPA_N_SSID" EXIT
    if create_connection wifi $WPA_N_SSID --security=wpa --key=$WPA_N_PSK; then
        connect_wireless # lp:1471663
        INTERFACE=`nmcli dev status | awk '/802-11-wireless|wifi/ {print $1}'`
        iw dev $INTERFACE link
        gateway_ping_test --interface=$INTERFACE
        STATUS=$?
        # We reconnect the Ethernet connection if any (lp:1471663)
        WIRED=$(nmcli -f UUID,TYPE c | grep -oP ".*(?=\s+.*ethernet)")
        if [[ ! -z $WIRED ]]; then
            nmcli c up uuid $WIRED
        fi
        exit $STATUS
    else
        exit 1
    fi

[Taihsiang Ho (tai271828)]

This issue seems to be able to reproduce only on some specific systems and releases. Let me use this bug tracker to collect systems that could reproduce it.