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Hello, I have a server that was set up to print orders from our salespeople every 15 minutes. A cron job checks to see if there are any new orders ...
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  1. #1
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    Print jobs not working correctly in cups


    Hello,
    I have a server that was set up to print orders from our salespeople every 15 minutes. A cron job checks to see if there are any new orders in a database. The cron job queries the database and any new orders since the last cron was run are sent to cups for printing. A couple months ago we updated the server to fix some problems. Well, those problems were fixed but it broke something so that these orders no longer print. I checked a few places for clues as to what is going on. The cron jobs are running correctly according to teh /var/log/messages file. In the /var/log/cups/error_log file I see this:
    E [05/Aug/2012:01:04:28 -0500] Unable to encrypt connection from 192.168.0.254.
    E [05/Aug/2012:01:04:28 -0500] error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol
    E [06/Aug/2012:08:10:19 -0500] Fatal error during SSL shutdown!
    E [06/Aug/2012:08:10:19 -0500] Fatal error during SSL shutdown!

    The first two occur every Sunday night and I am able to go onto the printer on Monday morning, pause the print job, set the status of the new orders in the database to new, and the start the printer to get them printed. But I have to do this every Monday and it really is a pain. Not only that, but there are two other order sheets just like this one that stopped printing altogether.

    The specific error I see in the print queue is:
    Paused- "/usr/libexec/cups/backend/hp failed"
    I looked this up and it led me to run an hp-check command, which I got this output:
    ---------------
    | SYSTEM INFO |
    ---------------

    Basic system information:
    Linux centraldb 2.6.36-gentoo-r5 #1 SMP Wed Feb 16 09:03:16 Local time zone must be set--see zic x86_64 Intel(R) Xeon(R) CPU E5506 2.13GHz GenuineIntel GNU/Linux

    Distribution:
    gentoo 0.0

    Checking Python version...
    OK, version 2.6.6 installed

    Checking PyQt 4.x version...
    OK, version 4.8.1 installed.

    Checking for CUPS... Status: scheduler is running Version: 1.5.3
    error_log is set to level: debug

    Checking for dbus/python-dbus... dbus daemon is running.
    python-dbus version: 1.0.0


    ------------------------------------
    | COMPILE AND RUNTIME DEPENDENCIES |
    ------------------------------------

    note: To check for compile-time only dependencies, re-run hp-check with the -c parameter (ie, hp-check -c).
    note: To check for run-time only dependencies, re-run hp-check with the -r parameter (ie, hp-check -r).
    Checking for dependency: CUPS - Common Unix Printing System...
    OK, found.

    Checking for dependency: CUPS devel- Common Unix Printing System development files...
    OK, found.

    Checking for dependency: CUPS image - CUPS image development files...
    OK, found.

    Checking for dependency: DBus - Message bus system...
    OK, found.

    Checking for dependency: gcc - GNU Project C and C++ Compiler...
    OK, found.

    Checking for dependency: GhostScript - PostScript and PDF language interpreter and previewer...
    OK, found.

    Checking for dependency: libcrypto - OpenSSL cryptographic library...
    OK, found.

    Checking for dependency: libjpeg - JPEG library...
    OK, found.

    Checking for dependency: libnetsnmp-devel - SNMP networking library development files...
    OK, found.

    Checking for dependency: libpthread - POSIX threads library...
    OK, found.

    Checking for dependency: libtool - Library building support services...
    OK, found.

    Checking for dependency: libusb - USB library...
    OK, found.

    Checking for dependency: make - GNU make utility to maintain groups of programs...
    OK, found.

    Checking for dependency: PIL - Python Imaging Library (required for commandline scanning with hp-scan)...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.

    Checking for dependency: PolicyKit - Administrative policy framework...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.

    Checking for dependency: PyQt 4 DBus - DBus Support for PyQt4...
    OK, found.

    Checking for dependency: Python DBus - Python bindings for DBus...
    OK, found.

    Checking for dependency: Python devel - Python development files...
    OK, found.

    Checking for dependency: Python libnotify - Python bindings for the libnotify Desktop notifications...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.

    Checking for dependency: Python XML libraries...
    OK, found.

    Checking for dependency: Python 2.3 or greater - Required for fax functionality...
    OK, found.

    Checking for dependency: Python 2.2 or greater - Python programming language...
    OK, found.

    Checking for dependency: Reportlab - PDF library for Python...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.

    Checking for dependency: SANE - Scanning library...
    error: NOT FOUND! This is a REQUIRED/RUNTIME ONLY dependency. Please make sure that this dependency is installed before installing or running HPLIP.

    Checking for dependency: SANE - Scanning library development files...
    error: NOT FOUND! This is a REQUIRED/COMPILE TIME ONLY dependency. Please make sure that this dependency is installed before installing or running HPLIP.

    Checking for dependency: scanimage - Shell scanning program...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.

    Checking for dependency: xsane - Graphical scanner frontend for SANE...
    warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.


    ----------------------
    | HPLIP INSTALLATION |
    ----------------------


    Currently installed HPLIP version...
    HPLIP 3.11.10 currently installed in '/usr/share/hplip'.

    Current contents of '/etc/hp/hplip.conf' file:
    # hplip.conf. Generated from hplip.conf.in by configure.

    [hplip]
    version=3.11.10

    [dirs]
    home=/usr/share/hplip
    run=/var/run
    ppd=/usr/share/ppd/HP
    ppdbase=/usr/share/ppd
    doc=/usr/share/doc/hplip-3.11.10
    html=/usr/share/doc/hplip-3.11.10/html
    icon=/usr/share/applications
    cupsbackend=/usr/libexec/cups/backend
    cupsfilter=/usr/libexec/cups/filter
    drv=/usr/share/cups/drv/hp

    # Following values are determined at configure time and cannot be changed.
    [configure]
    network-build=yes
    pp-build=no
    gui-build=yes
    scanner-build=no
    fax-build=no
    dbus-build=yes
    cups11-build=no
    doc-build=yes
    shadow-build=no
    hpijs-install=no
    foomatic-drv-install=no
    foomatic-ppd-install=no
    foomatic-rip-hplip-install=no
    hpcups-install=yes
    cups-drv-install=yes
    cups-ppd-install=no
    internal-tag=3.11.10
    restricted-build=no
    ui-toolkit=qt4
    qt3=no
    qt4=yes
    policy-kit=no
    hpijs-only-build=no
    lite-build=no
    udev-acl-rules=yes
    hpcups-only-build=no
    hpijs-only-build=no


    Current contents of '/var/lib/hp/hplip.state' file:
    Plugins are not installed. Could not access file: No such file or directory

    Current contents of '~/.hplip/hplip.conf' file:
    error: Could not access file: No such file or directory

    --------------------------
    | DISCOVERED USB DEVICES |
    --------------------------
    No devices found.

    ---------------------------------
    | INSTALLED CUPS PRINTER QUEUES |
    ---------------------------------

    hp_laserjet_2035n
    -----------------
    Type: Unknown
    Device URI: ///dev/null

    HP_LaserJet_P2035n
    ------------------
    Type: Printer
    Device URI: hp:/net/HP_LaserJet_P2035n?ip=****
    PPD: /etc/cups/ppd/HP_LaserJet_P2035n.ppd
    PPD Description: HP LaserJet p2035n zjs, hpcups 3.10.9, requires proprietary plugin Printer status: printer HP_LaserJet_P2035n is idle. enabled since Mon Aug 6 09:03:48 2012
    error: Required plug-in status: Not installed
    Communication status: Good

    hplaserjet_p2035n
    -----------------
    Type: Unknown
    Device URI: ///dev/null

    Tosh-237
    --------
    Type: Unknown
    Device URI: socket:*****
    PPD: /etc/cups/ppd/Tosh-237.ppd
    PPD Description: TOSHIBA e-STUDIO850 Series PS Printer sReady to print.Tosh-237 is idle. enabled since Mon Aug 6 08:53:31 2012
    warning: Printer is not HPLIP installed. Printers must use the hp: or hpfax: CUPS backend to function in HPLIP.


    ---------------------
    | PYTHON EXTENSIONS |
    ---------------------

    Checking 'cupsext' CUPS extension...
    OK, found.

    Checking 'pcardext' Photocard extension...
    OK, found.

    Checking 'hpmudext' I/O extension...
    OK, found.

    ---------------
    | USER GROUPS |
    ---------------
    root bin daemon sys adm disk wheel floppy dialout tape video


    -----------
    | SUMMARY |
    -----------

    error: 10 errors and/or warnings.



    I try to update hplip and it fails to install the required dependencies. I'm not sure if I'm even on the right trail here or not. I have experience with a few distros but Gentoo is very new to me. Does anyone have any ideas as to what I should check/do?

    Thanks ahead of time!

  2. #2
    Linux Newbie hagfish52's Avatar
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    Is the cron job set up on a separate client computer? It looks like the client computer is unable to establish an SSH connection with the server. And the fact that the SSL errors only show up on Sunday nights tends to point to the cron job.

  3. #3
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    Quote Originally Posted by hagfish52 View Post
    Is the cron job set up on a separate client computer? It looks like the client computer is unable to establish an SSH connection with the server. And the fact that the SSL errors only show up on Sunday nights tends to point to the cron job.
    Well that's the strange thing with these SSL errors. The cron jobs are all local to this server, but that ip address that can't establish the SSL connection is the firewall. I have no idea why the firewall would need to connect to the server, unless for some reason the firewall is set up to distribute the SSL cert? This is a decently sized company, so I would expect those certs to be handed out by a dedicated server.

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  5. #4
    Linux Newbie hagfish52's Avatar
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    Maybe the firewall is blocking CUPS on Sunday nights.

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