Multiple apps listening to one udp port

Launching second app instance gives error
java.net.BindException: Address already in use: Cannot bindIs there some way to make this work?

Thanks guys, this definitely verifies what I'm seeing, and I realize it's not just Java's problem. And I can't share the source b/c it's closed, I apologize for that. But it's basic socket level programming.
This really is the goal to run multiple apps, so can I get your advice along that approach-- one app listens on the UDP port, and collects all the data, and makes it available to several presentation clients. How to make it available? Regular TCP sockets? How would this middle tier program know when to flush its buffers--that is, when all the apps have gotten up to date? Does it need to know a count of subscribed presentation clients? Receive notification when they close, track if they've dropped off abnormally, etc... Sorry this sort of confuses me :o)
Maybe if there's a guarantee the UDP listener app is running on the same machine as the presentation clients I can use a different method besides sockets at that point?

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Transmitting multiple strings through one UDP port

I'm using UDP protocal to read information transmitted by another program through OSC. The only problem is, the information being transmitted by the program using OSC all comes through the same port, So the UDP in labview gets it all at the same time, and can only display one of the sets of information it is receiving. OSC does use a different address for each set of information, but I can't enter the address in Labview. It's not an IP address, an example would be "OSC.test.string.1". But I have no way of entering that into the UDP open.vi . When I enter a port, it selects the OSC address for me. If I was using "OSC.test.string.1" and "OSC.test.string.2" to send information over the same port, the UDP Read.vi in labview would only pick up whatever data is coming through the first one. Does anyone know a way to either seperate these addresses, or enter the address myself?

As Ravens already pointed out, your post is too cryptic to make any sense.
If you use acronyms with many meanings, define them!
Are you talking about UDP ports?
When you say "address" do you mean "IP address" or something else? Could it just be a message tag?
What is "it" in "... it selects the OSC address for me..."
How do you display the UDP strings received? If you use only a simple string indicator, you would only see the latest. If you want to display several received strings in rapid succession, you need to keep parsing and appending the new data to the old data and keep it in a shift register. Or you could use e.g. three indicators and update each according to the characteristics of the incoming string.
LabVIEW Champion . Do more with less code and in less time .

Listen to specific UDP Port

Hi guys,
I'm using a PHP script which contacts my Mac running growl to subsequently push notifications to my iPhone via Prowl.
This isn't working at all at the moment and it's proving difficult to establish whether A - the PHP script isn't contacting the Mac correctly or B - a firewall or equivalent is blocking access to Growl.
My set up is:
1. iMac running Growl and growl-notify;
2. a DynDNS account which points to my IP address;
3. Netgear router which forwards UDP port 9887 to my iMac (which has been allocated a static local IP address);
Is there anyway I can 'listen' to port 9887 to see what information is being received at that port? That way I can determine whether the plugin has been configured correctly or whether the script is generating an incorrect packet.
Thank you for your time.

Try Wireshark.

Operations Manager 2012 doesn't listening SNMP Trap UDP port 162

hi,
SCOM 2012 SP1, how come the operations manager started but the SNMP Trap UDP port 162 not listening?
Without this port listening, I can't testing SNMP trap on SCOM.
Thanks...KEN

Hi,
As described in the following blog, the TRAP service should be installed but turned off, we could not get traps coming in until we turned the service back on.
So please verify if the service is on. You can continue audit the ports by running netstat –a.
System Center 2012 Notes From the Field
http://scom-2012.blogspot.in/2012/07/setting-up-snmp-monitoring-in-scom-2012.html
Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
Hope this helps.

Howto check if any process listen to a UDP Port

Hi,
I am develop a STREAMS Kernelmodul. If I send a UDP/IP Message upstream and no process is listen at this destiantion port, the OS crashes down.
Is there any possibility to check if any process is listening to this port like "netstat -an | grep <PORTNUMBER>" with Kernelfunctions?
Any help is greatly appreciated
Thank You
Claus

The easiest way is to use lsof -i. (lsof is freeware.)
root@jupiter# lsof -i UDP:111
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
rpcbind 227 root 3u IPv4 0x30002f4be60 0t0 UDP *:sunrpc (Idle)
root@jupiter#
You can also use "netstat -an -P udp" to see if the socket is in use at all.
If you know the process ID, you can uses pfiles <pid>. for information about who the socket is connected to.

Best Practice in maintaining multiple apps and user logins

Hi,
My company is just starting to use APEX, and none of us (the developers) have worked on this before either. It is greatly appreciated if we can get some help here.
We have developed quite a few applications in the same workspace. Now, we are going to setup UAT and PRD environments and also trying to understand what the best practice is to maintain multiple apps and user logins.
Many of you have already worked on APEX environment for sometime, can you please provide some input?
Should we create multiple apps(projects) for one department or should we create one app for one department?
Currently we have created multiple apps for one department, but, we are not sure if a user can login once and be able to access to all the authenticated apps.
Thank you,
LC

LC,
I am not sure how much of this applies to your situation - but I will share what I have done.
I built a single 700+ page application for my department - other areas create separate smaller applications.
The approach I chose is flexible enough to accomdate both.
I built a separate access control application(Control) in its own schema.
We use database authenication fo this app - an oracle account is required.
We prefer to use LDAP for authentication for the user applications.
For users that LDAP is not option - an encrypted password is stored - reset via email.
We use position based security - priviliges are based on job functions.
We have applications, appilcations have roles , roles have access to components(tabs,buttons,unmasked card numbers,etc.)
We have positions that are granted application roles - they inherit access to the role components.
Users have a name, a login, a position, and a site.
We have users on both the East Coast and the West Coast, we use the site in a sys_context
and views to emulate VPD. We also use the role components,sys_contexts and views to mask/unmask
card numbers without rewriting the dependent objects(querys,reports,views,etc.)
The position based security has worked well, when someone moves,
we change the position they are assigned to and they immediately have the privileges they need.
If you are interested I can rpovide more detail.
Bill

Listen on one port, service request on multiple servers

we are migrating off oc4j to Weblogic 10.3.
One of the things that we really really liked about oc4j was the ability to distribute our applications across multiple JVMs, but refer to any of the apps with the same hostname and port; this meant that we could change the distribution of the applications over the JVMs and not touch the URLs used to access those applications. We would do this to isolate troublesome apps from other ones, and to keep JVM size reasonable.
With WebLogic, our understanding is that only one managed server can be accessed on a given host/port, and a managed server is one JVM. Does this mean that we will need to either put all our apps into one JVM, or else change URLs as the we move apps from one managed server to another?
Edited by: user8652010 on Feb 10, 2011 1:31 PM

1 yes, the dhcp server who's scope is full will not do a dhcp
'offer'
2 dhcp that answers fastest with a 'offer' will win. A delay is configurable (but changes nothing
about the root scenario were the fastest will win)
Note that if the scopes overlap on the servers, they might not lease out all the addresses in the scope.
I would enlarge the scope as you will want to fence against unavailability of one of the servers (or a network connection for that matter). you currently have more addresses leased out than any set of two of your servers can offer.
MCP/MCSA/MCTS/MCITP

I have two ip address on my machine,I want to directory server listen in one of the ip address(port 389) .what can i do

i have two ip address on my machine,I want to directory server listen in one of the ip address(port 389) .what can i do,now it is listen on 0.0.0.0

Hi,
Can you please show the current link? (the docs.iplanet.com is no longer valid)
I also have multiple ip addresses on my machine. When I login into the admin server, it always thinks it's one of the secondary ip addresses, which aren't granted access rights.
For example, if I go to configure a different port number for the admin server, it won't let me, because it thinks I am on one of the ip addresses which aren't allowed to access it.
Thanks.

I have tried a lot to find an app or some way in email to attach multiple of pdf files in one email. I could not find anything that sends multiple pdf file in one email and still keeping the file in simple pdf format for the recipient.

I have tried a lot to find an app or some way in email to attach multiple of pdf files in one email. I could not find anything that sends multiple pdf file in one email and still keeping the file in simple pdf format for the recipient.

I am not aware of a way except for photos that allows you to select multiple files in an email. I even checked settings in the Adobe Reader app, and it does not show that ability.

Can you have multiple RMI Servers listen at the same port?

Hi,
I am wondering if is possible to assign many RMI servers to the same port. I have a working RMI system that is assigning a single server to a specified port when the server is created. I need to scale my project to incorporate Activation and the ability to go through a firewall. I have the power to punch holes in the firewall, so I am thinking that I would like to set up a port for all my activated servers to listen on. Is this possible to put them all on one port?

Yes you are correct. However, I am wanting the actual servers listening on the same port. I have noticed that when I do not assign a port number when binding my RMI servers to the registry, then the rmi system sets them all up listening on the same port. This port is random and changes each time I restart my server system, which rebinds all the servers to the rmiregistry again. I am look for a way to use custom socket factories and then tell the servers the exact port to listen at. I keep getting port already in use issues though when I try to assign more than one server to a particular port. I don't know if this is even possible. Has anyone ever gotten this to work?

HT4814 TCP and UDP ports on router firewall to allow server to server administration running mavericks and server app 3.0?

What TCP or UDP ports do I need to open on my router firewall to allow server to server administration running maverics and server app 3.0?

Also you may want to open tcp port 625 so that you can update the server's OD master.
More info can be found here: http://support.apple.com/kb/ts1629 Well known TCP/UDP ports used by Apple Products.
HTH
- Leland

Multiple FCPX licenses on one app store account

Hi all,
I am trying to figure out if it's possible to run multiple FCPX licenses on one appstore account.
Searching the web gave me multiple options, but none of them really answered my question.
It's only two licenses (for two machines) so we aren't capable of volume licensing since that's only availabe when running more than 20 machines.
anyone an idea? would be great!
Thanks in advance

I'v got the same problem.
According to FCPX license one licens can be usen on one computer in the same time.
If You need to run in the same time more then one instance You need more license.
I bought one and i need three more.
Apple support in poland sending me to 'mac app store support form' on apple site... but this support sending me to Apple support in poland with this problem.
As far, for Poland there is no edication licenses and we need (i'm working at university) to but the same number of FCPX licenses like the number of computer on which we want to use them during classes... but mac app store aplication don't have button which allows me tu buy anoyher licenses... it claim that i got one olready....
If any one know how to buy another licenses on the same ID tell us.

Multiple Monitor Setup for HPE-180t w/ NVIDIA GeForce GT 220 (only one DVI port)

I am wanting to connect mutliple montitors via DVI connection to my HPE-180t. My graphics card is the NVIDIA GeForce GT 220 which has 3 ports (VGA, HDMI, DVI) and does support mutli monitor display. What is the best way for me to connect multiple monitors to my desktop? I would like for all of them to be connected via DVI.
Thank you so much,
Angela
``````````````````````````````````````````
old computer: HP Pavilion PU131AV / a1050y, Windows XP MCE, SP3 32bit, Nvidia GeForce 6600, Intel Pentium 4 CPU, 3.20 GHz, 2GB of RAM
new computer: HPE-180t, Windows 7 Pro (64bit), Nvidia GeForce GT 220, Intel Core i7-930 quad-core CPU @ 2.80 GHz, 8GB of RAM

What is the end goal you are attempting to acheive? Are you looking to clone all three monitors or each monitor to be independent of the other (extended display)?
This document covers how to configure the monitors in Windows 7. I didn't see the GT 220 listed in the specifications, so I take it this is one purchased separately for the unit. Most video cards require multiple monitors to be connected to a different port (to truly achieve a multiple monitor setup). Since the card only has one DVI port, then the other ports (HDMI and VGA will need DVI adapters). An example of an HDMI - DVI adapter can be found here.
The tricky part will be using the VGA - DVI adapter as DVI ports are typically DVI-D which makes it a pure digital signal. VGA is analog, so the adapter will need to be special if the monitor is using a DVI-D port. If it is a DVI-A or DVI-I port, then a standard VGA - DVI adapter will work. If it is a DVI-D port, you will need an active VGA - DVI adapter. If it is DVI-A/I, then a passive adapter will work. This is an example of an Active VGA - DVI adapter. For that adapter, a VGA cable will need to be connected to the VGA port with that end connected to the VGA side of the adapter and then being connected to the DVI port of the monitor.
Provided the video card supports 3 monitors, this would allow all monitors to have a DVI connection. Keep in mind that the VGA port will still deliver an analog signal as opposed to the DVI and HDMI ports. The card specifications do not really say how many monitors it supports, but it most likely does support three monitors.
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Is there and app that does the following. Multiple apps are showing a clock in different rooms, all are synced together, one ipad is a master ipad and if you change the time on it all other ipads change the time

Is there and app that does the following. Multiple apps are showing a clock in different rooms, all are synced together, one ipad is a master ipad and if you change the time on it all other ipads change the time

None of the spreadsheet apps that work with Excel files offer anything like full native support in iOS. Apple's own Numbers app pairs down features for the iOS version. The hardware is simply not up to what a true computer is capable of, so all apps like QuickOffice, DocumentsToGo, Numbers and so forth offer reduced features from their computer-version counterparts.
I think a custom app will be your only real choice, be it a fully standalone app, or something built in filemaker or some other db-based platform.

Open same UDP port from multiple applications

I need to write to a local UDP port from one application, and read from that same UDP port from another application. (We're doing two-way communication, but use one port to send from A to B, and another port to send from B to A.) One of the applications is written in C++, and the C++ UDP open includes ReuseAddress in the socket options; there seems to be no way to specify this functionality from LV. Note that these applications are deployed to a Vista (64-bit) system with the LV Runtime (not the LV development environment).
This used to work when we were using LV 8.5 (as long as we ran the LV application before running the C++ application), but when we updated to LV
8.6.1 it no longer works -- the second application to be run cannot open the UDP port.
Sometimes the applications are run on different machines, and then everything works fine. But sometimes we need to run both applications on the same machine, and then we encounter this problem. So whatever solution we come up with, we need to be able to make it work in both configurations (same machine, or different machines).

I discovered that I can open any port (e.g., 0, and let it allocate a port for me), and then write to the port I want to write to with no problems, bypassing the problem.

Multiple apps listening to one udp port

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