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  • synchronize threads - no UI

    - by UshaP
    I'm trying to write multithreading code and facing some synchronization questions. I know there are lots of posts here but I couldn't find anything that fits. I have a System.Timers.Timer that elapsed every 30 seconds it goes to the db and checks if there are any new jobs. If he finds one, he executes the job on the current thread (timer open new thread for every elapsed). While the job is running I need to notify the main thread (where the timer is) about the progress. Notes: I don't have UI so I can't do beginInvoke (or use background thread) as I usually do in winforms. I thought to implement ISynchronizeInvoke on my main class but that looks a little bit overkill (maybe I'm wrong here). I have an event in my job class and the main class register to it and I invoke the event whenever I need but I'm worrying it might cause blocking. Each job can take up to 20 minutes. I can have up to 20 jobs running concurrently. My question is: What is the right way to notify my main thread about any progress in my job thread? Thanks for any help.

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  • Cannot Display Data from MySQL table

    - by MxmastaMills
    I've got a pretty standard call to a MySQL database and for some reason I can't get the code to work. Here's what I have: $mysqli = mysqli_connect("localhost","username","password"); if (!$mysqli) { die('Could not connect: ' . mysqli_error($mysqli)); } session_start(); $sql = "SELECT * FROM jobs ORDER BY id DESC"; $result = $mysqli->query($sql); $num_rows = mysqli_num_rows($result); Now, first, I know that it is connecting properly because I'm not getting the die method plus I added an else conditional in there previously and it checked out. Then the page displays but I get the errors: Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in blablabla/index.php on line 11 Warning: mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given in blablabla/index.php on line 12 I've double-checked my database and there is a table called jobs with a row of "id" (it's the primary row). The thing that confuses me is this is code that I literally copied and pasted from another site I built and for some reason the code doesn't work on this one (I obviously copy and pasted it and then just changed the table name and rows accordingly). I saw the error and tried: $num_rows = $mysqli_result->num_rows; $row_array = $mysqli_result->fetch_array; and that fixed the errors but resulted in no data being passed (because obviously $mysqli_result has no value). I don't know why the error is calling for that (is it a difference in version of MySQL or PHP from the other site)? Can someone help me track down the problem? Thanks so much. Sorry if it's something super simple that I'm overlooking, I've been at it for a while.

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  • Network Printer or Share Printer on Server?

    - by Joeme
    Hi, Small office, <10 users. USB printer which also has a network port. Is it better to share the printer by plugging the usb into the sevrer, and do a windows share, or use the built in network port? We are using the built in network port at the moment, but don't have control to delete jobs in the queue that get stuck. Thanks, Joe

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  • Running Job and Paused Job Writing to the same File

    - by Kyle Brandt
    So I ran tcpdump twice overnight by accident, both outputting to the same file. However, I ran them as jobs and one of them has been paused the whole time. Anyone have a recommendations on how to keep the file? So far I have thought of: kill -9 the paused job Pause the running job, copy the file, and then stop both. Two sounds like the safest option, anyone have a better idea other than not doing this in the first place ;-)

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  • ClamD server Currently Down

    - by RedLEON
    I'm getting this error message after install ClamAV from direcadmin message system. OS: CentOs 5. The service 'clamd' on server star.tunahost.net is currently down This message has been automatically generated notifying you that the service clamd is currently down. Why can I get this error for each hour? I checked up cron jobs and I couldn't find any job about it. How to control Clamd service? OS: CentOS with DirectAdmin

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  • Setup/Guidance/Troubleshooting DPM 2010 Bare Metal Backups

    - by Dan Kingdon
    Hi all, Having difficulties setting up Bare Metal recovery in DPM 2010. Does anyone know of a good guide/walkthrough to talk me through a basic setup? I have tried most of the DPM knowledge base without much luck. I can perform System State backups, but as soon as I enable bare metal the jobs start failing. Error codes are not coming up anything on google at all. Thanks in advance

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  • Webmin Cluster Copy Protocol

    - by hozza
    Just toying with a clustered server farm for fun (as you do) and experimenting with Webmin and its 'clustered' modules. It has a feature that can copy files from one server to another on a repeating basis. Does this feature/module use cron jobs and what protocol does it use to copy the files? I have searched all about the net and yet I cannot find any decent documentation on webmin or its features. Is it just poorly documented or am I missing something?

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  • Flash crashing Mac?

    - by Bohdan Trotsenko
    In his recent blogpost, Thoughts on Flash, Steve Jobs says: We also know first hand that Flash is the number one reason Macs crash. My best guess is that Flash runs in user-mode, with restricted privileges. Is is impossible to crash a system having restricted privileges. What am I missing?

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  • Cron - run task every 90 min.

    - by Cory J
    Trying to adjust a cron job to run every 90 min. It was previously running every 20 min, which was a simple cron job: */20 * * * * whatever To change it to every 90, it seems like I need to split it into 2 jobs, I've done this: 0 0,3,6,9 * * * whatever 30 1,4,7,10 * * * whatever Is this right? The job doesn't seem to kick off.

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  • socat and rich terminals (with Ctrl+C/Ctrl+Z/Ctrl+D propogation)

    - by Vi
    socat - exec:'bash -li',pty,stderr,ctty - bash: no job control in this shell What options should I use to get fully fledged shell as I get with ssh/sshd? I want be able to connect the shell to everything socat can handle (socks5, udp, openssl), but also to have a nice shell which correctly interprets all keys, various Ctrl+C/Ctrl+Z and jobs control. Update: Found "setsid" socat option. It fixes "no job control". Now trying to fix Ctrl+D.

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  • socat and "no job control in this shell"

    - by Vi
    socat - exec:'bash -li',pty,stderr,ctty - bash: no job control in this shell What options should I use to get fully fledged shell as I get with ssh/sshd? I want be able to connect the shell to everything socat can handle (socks5, udp, openssl), but also to have a nice shell which correctly interprets all keys, various Ctrl+C/Ctrl+Z and jobs control. /* Requested tags: socat job-control */

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  • Auto-start the SQL Server Agent after a computer restart

    - by Dreas Grech
    I am using the SQL Server Agent to run some jobs every day, but the problem is that whenever the server (the machine itself) is restarted, the SQL Server Agent doesn't automatically start when the computer boots back up again...and I have to start it manually myself. How can I set the Server Agent to Auto-Start after a computer restart? Is there a particular Windows Service I need to set as auto-start ?

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  • Multitasking on iOS4 and its stated battery efficiency

    - by eml
    Apple stated that the reason multitasking didn't arrive before iOS4 is because they hadn't figured out how to do it right. Jobs stated at Apple WWDC 2010 that they now do and that they solved the problem of preserving battery performance regarding multitasking. Is iOS4's multitasking "feature" indeed more efficient regarding battery performance compared to Android? Have the Android developers managed to "do it right" too?

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  • Configure Local Mail on Ubuntu

    - by Eric J.
    My cron jobs are trying to mail their results using the local mail feature of Ubuntu (not internet email, the kind of mail you can read with mutt). However, /var/log/syslog reports /USR/SBIN/CRON[19212]: (speedtax) MAIL (mailed 52 bytes of output but got status 0x0006 ) I would like to setup local mail (so that cron can deliver the output successfully) but do not want to setup internet email. Everything I find on google is about the latter.

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  • prevent sleep in scripts

    - by Mr Fooz
    Is there a way to prevent Windows from going into sleep mode while running a program on the command line or with cygwin? Ideally, I'm hoping for something that could be used like: nosleep myscript.sh Background Sometimes I start up long-running jobs like a manual backup or large file transfers and I've found that Windows often goes to sleep before these finish. I'd like to be able to start up the command and prevent sleep mode while the command is running, but have it automatically work again once the command has completed.

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  • CUPS in linux and printer

    - by yogesh
    How can I achieve the following behavior? CUPS Server communicate with hardware printer by using the "PostScript3" language and the LPD/LPR protocol to manage and transmit printing jobs. CUPS server must be configured to accept following file formats: PS, TXT, PDF, JPEG and PNG. This means only these files get printed and others should be blocked. I want to connect actual hardware printer using IPP from the linux machine.

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  • Faking the date for a specific shell session

    - by Julien Nicoulaud
    I'm certainly trying to achieve something weird here, but I want to fake the date locally for a shell session on GNU/Linux. I need to black-box test how a program behaves at different dates, and modifying the system-wide date can have unwanted side effects (cron jobs, messed up logs, etc). Any ideas ?

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  • Passing parameters to a shell script running as a cronjob

    - by Takashi
    I am new to bash scripting (not programming in general). I am writing a bash script that will run a Python script I have written. I want to be able to do the following: Pass parameters to the bash script via the cronjob (so I can have two cron jobs) one to be run with parameter 'foobar', and the other 'foo' switch based on the parameter passed to the bash script (by switching, I mean an if/else based on the paramter passed to the bash script).

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  • DNS Records: Forwarding a port on my public domain

    - by marienbad
    I've set up an MX record for a local mailserver before, but I've never done this... I want to set up my public domain (registered by Dreamhost) to accept IPP (Internet Printing Protocol) jobs and send them to the IPP LaserJet printer on my home LAN. IPP uses port 631. What do I put in my DNS records?

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  • Leopard Macbook very slow after waking up from sleep / cron?

    - by yairchu
    Problem: Occasionally, my Macbook becomes very slow after waking up from sleep I open Activity Monitor and notice some processes like makewhatis are taking 100% CPU I kill the process[es] and then everything works fine again Questions: My guess is that these processes are cron jobs. Is that correct? Is it ok to kill them? Is there a way to make this problem not happen? Is this fixed on Snow Leopard? I'm using Leopard (10.5.8) on a MacBook5,1

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  • In CPanel, cron job is not being executing and not sending any mail

    - by Abhishek
    though many of us has asked many question related to cron jobs, let me ask my one... I want to execute a PHP script periodically. As a cron command I'm using: php -q http://www.example.com/cron.php?action=getA I also tried this one: php -q /home/myuser/www.example.com/cron.php?action=getA It is not getting executed and not sending any mail. I set the mail ID to my gMail ID. What am I doing wrong?

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  • How do you switch between Linux manual pages?

    - by Sheldon
    I'm new with Linux and have noticed that there are numbers beside certain commands I look up. For example I want to look up accept() in the aspect of network programming, but man accept shows this instead: accept(8) Easy Software Products accept(8) NAME accept/reject - accept/reject jobs sent to a destination So how do you switch between manual pages to other numbers like accept(1) ~ accept(7)?

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  • montoring service to detect when email is not received

    - by DGM
    I would like to monitor an email server - not whether the port is open and receiving, but rather that a "canary" message sent every so often actually arrives somewhere else. I have had a problem with a server getting firewalled off and no one noticing that cron jobs are not coming from the machine for a few weeks. Of course, the machine itself cannot send out a notification if it is having problems, so this requires an outside service. Any ideas?

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