Maximum connections on UDP/TCP

I'm trying to find how many connections could be established and handled on java TCP/UDP sockets:
1. In TCP when I'm using a ServerSocket.accept(), how many clients can I handle, is it O/S dependent?, or is it set by the 2nd parameter when creating a new Server socket: public ServerSocket(int port, int backlog)?
2. In UDP, when using DatagramSocket.receive(packet), how many client calls could be handled, is it also O/S dependent or could be set?
Thank you!
Boaz

IP only has 65535 ports, so that limits the number of clients you can serve at a time.

Similar Messages

SbRIO-9612 unable to close a TCP connection without causing TCP failure

Hello,
I'm working on a multi-server (sbRIO-9612's), multi-client (Windows PCs) application which uses the STM 2.0 libraries and LV2009 SP1. The server listens on a UDP port for the client to send a message - once sent, the server opens the TCP connection to the client and all is well . . .
. . . until I added a "hearbeat" message to monitor for down connections. Once the TCP connection has been extablished, the client PC sends a TCP message (a request for the number of clients connected) to the server sbRIO-9612 every 5 seconds - both the client and server are coded to close the connection if a message is not received within 10 seconds. The client-side app works fine - if the TCP message is not returned in 10 seconds, the connection is closed and a new UDP message is sent to re-establish it.
The server-side is the problem - if no message is received in 10 seconds, the TCP connection is closed o.k. (no errors), but the server will no longer allow new TCP connections to be established unless it's rebooted. It seems to work fine if I leave the non-communicating TCP connections open on the server-side, but I can see this leading to problems after several clients have disconnected without notifying the server properly.
Interestingly, if the client closes the TCP connection properly (via TCP Close in LV), the server detects it fine and there is no problem.
I'm allowing the operating system on both sides to select the TCP port to use.
Any help is greatly appriciated - thank you!
Al

Hi Al,
Thanks for the update -- I'm glad that you were able to find that the issue wasn't actually with the TCP VIs, and moreover that LabVIEW 2010 SP1 seems to have resolved the issue. I would still recommend combing through the code on the RT end to ensure that the LabVIEW 2010 SP1 upgrade really did 'fix' the underlying issue. It's somewhat strange that a version upgrade resolved TCP communication issues that you were having. I just want to be sure that the solution is a truly stable one.
Sanjay C.
Embedded Software Product Manager| National Instruments

## NEED HELP ## Weblogic Managed Server Holding Maximum Connections

In one of our weblogic setup, we have weblogic cluster with 4 members. This cluster has been setup with 2 physical servers, each server having 2 cluser members like below...
Host Server 1 : ManagedServer1:7003, ManagedServer2:7004
Host Server2 : ManagedServer3:7003, ManagedServer4:7004
Cluster member of ManagedServer1:7003 holding maximum connection to HostServer2 and same cluser member of ManagedServer3:7003 holding maximum connection with HostServer1.
As my assumption, since members are in cluster, heartbeat between the members (Host Server 1 : ManagedServer1:7003 and Host Server2 : ManagedServer3:7003) are holding the connections.
Currently each managed server 8000 to 10000 connections holding as ESTABLISHED.
Please let me know, what may be the reason, but other members of same cluster are fuctionality fine.

Hi Sujit,
after executing lsof command, we found below results....and we are unware of afs3-vlserver...this is taking maximum number of connections....
SERVER 1
lsof -i :7003
7003 : fcr_server2
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
java 4744 oracle 532u IPv6 359952122 TCP server1:33586->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 736u IPv6 321513088 TCP server1:46983->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 762u IPv6 321513090 TCP server1:46985->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 765u IPv6 322352894 TCP server1:62305->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 769u IPv6 321512933 TCP server1:46851->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 770u IPv6 321513092 TCP server1:46987->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 771u IPv6 321560765 TCP server1:65309->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 777u IPv6 321560752 TCP server1:65296->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 780u IPv6 321560759 TCP server1:65303->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 782u IPv6 321560747 TCP server1:65292->server2:afs3-vlserver (ESTABLISHED)
java 4744 oracle 783u IPv6 321560758 TCP server1:65302->server2:afs3-vlserver (ESTABLISHED)
SERVER 2
lsof -i :7003
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
java 14332 oracle 720u IPv6 129183836 TCP server2:afs3-vlserver->server1:46985 (ESTABLISHED)
java 14332 oracle 751u IPv6 129207449 TCP server2:afs3-vlserver->server1:65309 (ESTABLISHED)
java 14332 oracle 775u IPv6 129183781 TCP server2:afs3-vlserver->server1:46983 (ESTABLISHED)
java 14332 oracle 778u IPv6 129183849 TCP server2:afs3-vlserver->server1:46987 (ESTABLISHED)
java 14332 oracle 780u IPv6 129374814 TCP server2:afs3-vlserver->server1:20099 (ESTABLISHED)
java 14332 oracle 783u IPv6 129207310 TCP server2:afs3-vlserver->server1:65289 (ESTABLISHED)
java 14332 oracle 786u IPv6 129207343 TCP server2:afs3-vlserver->server1:65303 (ESTABLISHED)
java 14332 oracle 787u IPv6 154651528 TCP server2:afs3-vlserver->server1:35492 (ESTABLISHED)
java 14332 oracle 792u IPv6 129207347 TCP server2:afs3-vlserver->server1:65304 (ESTABLISHED)
Please let us know about this....
Thanks

Why does AEBS Deny UDP/TCP?

What does this ipfw log mean? My ip address is 192.168.1.3 and the AEBS is 192.168.1.1 and is the router for my network. Why would I be denying my own AEBS connection? Thanks,
Pat
Mar 16 11:53:33 localhost ipfw: 20000 Deny ICMP:8.0 192.168.1.1 192.168.1.3 in via en1
Mar 16 11:53:33 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49225 from 192.168.1.1:192
Mar 16 11:53:33 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49226 from 192.168.1.1:192
Mar 16 11:53:34 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49228 from 192.168.1.1:192
Mar 16 11:53:36 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49229 from 192.168.1.1:192
Mar 16 11:53:36 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49230 from 192.168.1.1:192
Mar 16 11:53:38 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49231 from 192.168.1.1:192
Mar 16 11:53:39 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49232 from 192.168.1.1:192
Mar 16 11:53:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49785 255.255.255.255:2222 in via en1
Mar 16 11:55:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49799 255.255.255.255:2222 in via en1
Mar 16 11:56:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49807 255.255.255.255:2222 in via en1
Mar 16 11:58:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49809 255.255.255.255:2222 in via en1
Mar 16 12:00:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49811 255.255.255.255:2222 in via en1
Mar 16 12:01:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49812 255.255.255.255:2222 in via en1
Mar 16 12:02:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49813 255.255.255.255:2222 in via en1
Mar 16 12:03:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49814 255.255.255.255:2222 in via en1
Mar 16 12:04:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49816 255.255.255.255:2222 in via en1
Mar 16 12:05:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49817 255.255.255.255:2222 in via en1
Mar 16 12:06:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49835 255.255.255.255:2222 in via en1
Mar 16 12:07:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49837 255.255.255.255:2222 in via en1
Mar 16 12:08:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49838 255.255.255.255:2222 in via en1
Mar 16 12:09:59 localhost ipfw: 35000 Deny UDP 192.168.1.108:49839 255.255.255.255:2222 in via en1
Mar 16 13:29:36 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49302 from 192.168.1.1:192
Mar 16 13:29:38 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49303 from 192.168.1.1:192
Mar 16 13:29:38 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49305 from 192.168.1.1:192
Mar 16 13:29:42 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49306 from 192.168.1.1:192
Mar 16 13:29:42 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49308 from 192.168.1.1:192
Mar 16 13:29:42 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49309 from 192.168.1.1:192
Mar 16 13:29:42 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49310 from 192.168.1.1:192
Mar 16 13:30:36 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49312 from 192.168.1.1:192
Mar 16 13:30:37 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49313 from 192.168.1.1:192
Mar 16 13:30:38 localhost ipfw: Stealth Mode connection attempt to UDP 192.168.1.3:49314 from 192.168.1.1:192
Mar 16 13:50:28 localhost ipfw: Stealth Mode connection attempt to TCP 192.168.1.3:49545 from 17.250.248.152:143
Mar 16 13:51:28 localhost ipfw: Stealth Mode connection attempt to TCP 192.168.1.3:49545 from 17.250.248.152:143
Mar 16 13:59:21 localhost ipfw: 35000 Deny UDP 0.0.0.0:68 255.255.255.255:67 in via en1
Mar 16 13:59:25 localhost ipfw: 35000 Deny UDP 192.168.1.2:49456 239.255.255.250:1900 in via en1
Mar 16 13:59:25 localhost ipfw: 35000 Deny UDP 192.168.1.2:49456 239.255.255.250:1900 in via en1
Mar 16 13:59:25 localhost ipfw: 35000 Deny UDP 192.168.1.2:49456 239.255.255.250:1900 in via en1

I have an AEBS that doesn't want to get an IP#. It always seems to want ot self assign something in the range of 169.255.120.101 or something.
This address is indicative of the AEBS not being able to connect to or recognize a DHCP server.
f I plug my DSL modem directly to the computer, it immediately recognises the line and get an IP#, but when I switch to the AEBS, the BS jsut makes up its own.
Are you performing a power recycle when switching devices connected to the DSL modem? Most modems "memorize" the MAC address of the device connected to it. Without a proper power recycle, it may not recognize the MAC of the new device connected to it.
Modem/Router Power ReCycling
- Power-off the DSL/Cable modem, Internet Router, & computer(s). (If possible, leave the modem off overnight.)
- Power-on the DSL/Cable modem; Wait at least 30 minutes.
- Power-on the Internet Router; Wait at least 5 minutes.
- Power-on the computer(s)

Sockets, multicast/broadcast, UDP, TCP, SO_REUSEADDR, SO_REUSEPORT and SO_EXCLUSIVEADDRUSE

EDIT: the topic was moved to https://social.msdn.microsoft.com/Forums/vstudio/en-US/6b0fbcbc-1139-4d7a-a62a-a5b16a6e0229/sockets-multicastbroadcast-udp-tcp-soreuseaddr-soreuseport-and-soexclusiveaddruse?forum=wcf .
Hello,
in the project Dao (https://github.com/daokoder/dao) we got stuck upon a problem with a wrapper interface for bind(), which should be multiplatform (work on all Windows versions from XP higher and also on BSDs and also other POSIX systems) and offer the
following two options:
1) A safe bind of one socket, one address (specific or wildcard) and one port such that no other process (disregarding the user the process runs under and disregarding user privileges) could be successful with a call to bind() on the same socket with the
same address and the same port.
2) A bind with allowing multicast/broadcast, reuse of address, port and all these disregarding the state of the socket (e.g. TIME_WAIT) and disregarding the type of connection (UDP, TCP). In other words, the behavior should be the same a the behavior of
BSD sockets in all cases and under all conditions.
The main differences between BSD and Windows are conveniently described on http://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t . According to that, one would say that a solution:
1) For BSD "0" and for Windows "SO_EXCLUSIVEADDRUSE"
2) For BSD "SO_REUSEPORT | SO_REUSEADDR" and for Windows "SO_REUSEADDR"
is enough. But it's not true. For example due to Enhanced Socket Security and their behavior described in the table http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621(v=vs.85).aspx (after first call to bind() with wildcard address and SO_REUSEADDR
set, a second call to bind() with non-wildcard address and SO_REUSEADDR set will fail with error WSAEACCES).
A solution might be to gather all the needed information (like user id, if there are any processes using that particular socket and if a call to connect() was already issued in case of TCP) and according to this information use the right mix of options SO_REUSEADDR,
SO_EXCLUSIVEADDRUSE and others if needed. We didn't find though enough documentation about where to get all the needed information. Note that this solution would need an atomic query on socket (for all the information) in conjunction with a call to bind().
Another solution could be to call bind() with different flags and decide upon the return error codes. This is though a nasty hack we would like to avoid.
The question for you is, if you happen to know about any better solution than the ones mentioned above. There is a public discussion about this problem starting with comment https://github.com/daokoder/dao/issues/243#issuecomment-60434078 .
Thank you in advance!

Hi dao_lang_rulezz,
Thanks for posting in the TechNet Forum.
As my point of viewer, this requirement is related to program developing issue.
This forum is related to Windows 8.1 Client.
To receive better support, it is recommend to ask in corresponding developing forum.
Best regards，
Fangzhou CHEN
Fangzhou CHEN
TechNet Community Support

Program ID in RFC connection of Type TCP/IP:

Hi ,
Please let me know need to put Program ID in RFC connection of Type TCP/IP.
Is it necesary to register in java environment?
Regards,
Praveen K

Hi ,
We have a scenario where 3rd Party system need to connect SAP PI Over TCP/IP and Vice Versa.
For this where we need to register the Program ID in SAP PI, but when the 3rd Party Application tries to Ping the PI system OR ViceVersa ,PROGRAM ID is Getting DE-Registered from the SAP PI.
regards,
Praveen K
Edited by: praveen kalwa on Jun 28, 2010 5:42 PM
Edited by: praveen kalwa on Jun 29, 2010 11:34 AM

ASA5510 - Maximum connect time

Quick question. I have configured the "Maximum Connect Time" as unlimited in my group policy but when a connection is established it shows a "Conn Time Out: 120 minutes".
The connection does get dropped with this timer. Any idea how to actually make it unlimited and why it get sets to 120?
I having a problem with SSL phone clients dropping throughout the day and think this may be the cause.
Thanks

I ended up rebooting the ASA this morning and it fixed the issue. Right away the timeout changed to what I had configured it to be and I was also able to make changes.
Here's the response from TAC. Thanks for helping with this. Much appreciated.
"I am glad that the issue was resolved on a reboot. Might be that svc sessions were stuck in the memory for some reason and the same sessions would be invoked every time you connected rather than tearing it down and creating a new svc session.
Once rebooted I believe the sessions stuck in memory were cleared and new sessions came up as a result the issue vanished. I shall surely update you as I have an update from the devs on this."

Maximum connections allowed for AMS 5.0.1

How can I find out the maximum connection allowed for adobe media server 5.0.1 standard license?

...that would depend on your application.
For a one-way video-on-demand system that streams recorded video at the user's request. Adobe Media Server serves only one stream to each user.
Here are the bandwidth calculations you would make:
Calculating server bandwidth needs (BWs):
BWs = N × S
where N = number of simultaneous users (subscribers)
and S = average bitrate of encoded A/V content
For example to calculate the overall server bandwidth needed to stream video encoded at 500 Kbps to 1000 simultaneous users:
500 Mbps = 1000 × 500 Kbps
The above assumes that content is encoded at a constant bitrate. Most often, however, you will vary the bitrate of the content to suit the viewing audience. This affects your bandwidth needs at both the client and server level.
For example, suppose you estimated that half of the 1000 simultaneous users were going to connect via 350 Kbps DSL modem and the other half via 3 Mbps cable modem. Suppose further that while the video encoded at 500 Kbps was appropriate for the cable viewers, you wanted to encode a separate video at 150 Kbps for the DSL modem users.
In this case, the total bandwidth required of the system is lowered to 325 Mbps:
325 Mbps = (500 Kbps × 500) + (150 Kbps × 500)
This help ?

RFC Adapter CC Maximum connection.

Hi Experts,
In our scenario in RFC Communication channel the maximum connection parameters is blank. In that field there not specified any figure. so please can you tell me in that case how many connections it will take by default.
Regards
Prabhakar.A

HI,
Per day in my scenario nearly 600 files will process. RFC used for RFC lookup by passing the country code to ecc system that ecc system is generate the sequential number and send it to the XI system mapping. some times the sequential number is not getting to the target field. can you please sugest me the solution.
Regards,
Prabhakar.A

Socket maximum connections reached

hi,
i got this error since fews days. And i do not know what to do with.
java.net.SocketException: No buffer space available (maximum connections reached?): connect
thanks
Herve

How many connections do you need? Are you closing them properly?
file:///D:/Java/jdk1.4.0/docs/api/java/net/ServerSocket.html#ServerSocket(int,%20int)

ORA - Maximum Connections Reached

Dear All
Even after implementing Connection pooling in our Application , we very often get this error "150 process exceede- Maximum Connection reached" ? How do we handle this? Our application is about to GoLive in another month .Please help us.
Thanks
AKS

It was simple to plan a download calendar in the case of exceeding maximum connections.
I think this rerolve.
1-"In this momment isn't not possible too manny connections"
2-Please your type of modem: xpto / xpt1 / xpt2 / etc...
3-Calculating 'tracert time'
3-Calculating time max: x minutes min: y minutes
4-Plan a download time:
TODAY DD1/MM1/YYYY1
-HOURS-
10 -
11 -
12
13 -
DD1/MM1/YYYY1
10
11 -
12 -
13
14
15 -
DD1/MM1/YYYY1
10
11
12
13 -
14 -
15
..

SCOM 2007 - SharePoint 2007: Maximum connections counter

Hello,
I am trying to locate the "Maximum connections counter" for SharePoint 2007 using SCOM 2007. I don't see it so far!!!
"Web Service - Maximum Connections" does not show anywhere any idea?
Thanks,
Dom
System Center Operations Manager 2007 / System Center Configuration Manager 2007 R2 / Forefront Client Security / Forefront Identity Manager

The object is Web Service, which then has several different counters, which then might have several instances.
If this performance object is something you want to monitor for, and it is not included in the mp, then you just need to create a performance monitor or collection rule, depending on what you want to do with the data.
The Exchange 2013 MP, for example, has no performance collection rules. So it's very possible, while the product group wanted to include everything most people need, they could have forgotten or were just not able to do so before they had to release
the mp. The MOSS 2007 MP has been around for years, was never updated, and isn't one of the better mps from MSFT. So if you want to extend it with a custom management pack, or just add something via the console, then you should be fine.
Regards, Blake Email: mengotto<at>hotmail.com Blog: http://discussitnow.wordpress.com/ If my response was helpful, please mark it as so, if it answered your question, then please also mark it accordingly. Thank you.

Could not connect to net.tcp://localhost:890/Microsoft.Exchange.Directory.TopologyService

All the Exchange 2013 Prerequisites appeared to install correctly. The installation of Exchange 2013 on Windows Server 2012 hangs at Initializing Setup. Then I find event 4027, source MSExchange ADAccess in the application event log. The
same thing happens if I try to prepare the Active Directory from the command prompt. The old Exchange 2007 server and Active Directory Server are on the same network and all firewalls are off. The entire content of the event is below. Any ideas
appreciated.
Log Name: Application
Source: MSExchange ADAccess
Date: 1/30/2014 12:47:01 PM
Event ID: 4027
Task Category: (1)
Level: Error
Keywords: Classic
User: N/A
Computer: MAILSRV2.sescolighting.com
Description:
The description for Event ID 4027 from source MSExchange ADAccess cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
ExSetupUI.exe
3868
Get Servers for sescolighting.com
TopologyClientTcpEndpoint (localhost)
3
System.ServiceModel.EndpointNotFoundException: Could not connect to net.tcp://localhost:890/Microsoft.Exchange.Directory.TopologyService. The connection attempt lasted for a time span of 00:00:02.0038715. TCP error code 10061: No connection could be made because
the target machine actively refused it 127.0.0.1:890. ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:890
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
at System.ServiceModel.Channels.BufferedConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.ICommunicationObject.Open()
at Microsoft.Exchange.Net.ServiceProxyPool`1.GetClient()
at Microsoft.Exchange.Net.ServiceProxyPool`1.TryCallServiceWithRetry(Action`1 action, String debugMessage, WCFConnectionStateTuple proxyToUse, Int32 numberOfRetries, Boolean doNotReturnProxyOnSuccess, Exception& exception)
the message resource is present but the message is not found in the string/message table
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="MSExchange ADAccess" />
<EventID Qualifiers="49156">4027</EventID>
<Level>2</Level>
<Task>1</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2014-01-30T17:47:01.000000000Z" />
<EventRecordID>821</EventRecordID>
<Channel>Application</Channel>
<Computer>MAILSRV2.sescolighting.com</Computer>
<Security />
</System>
<EventData>
<Data>ExSetupUI.exe</Data>
<Data>3868</Data>
<Data>Get Servers for sescolighting.com</Data>
<Data>TopologyClientTcpEndpoint (localhost)</Data>
<Data>3</Data>
<Data>System.ServiceModel.EndpointNotFoundException: Could not connect to net.tcp://localhost:890/Microsoft.Exchange.Directory.TopologyService. The connection attempt lasted for a time span of 00:00:02.0038715. TCP error code 10061: No connection
could be made because the target machine actively refused it 127.0.0.1:890. ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:890
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at System.ServiceModel.Channels.SocketConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
at System.ServiceModel.Channels.BufferedConnectionInitiator.Connect(Uri uri, TimeSpan timeout)
at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.ICommunicationObject.Open()
at Microsoft.Exchange.Net.ServiceProxyPool`1.GetClient()
at Microsoft.Exchange.Net.ServiceProxyPool`1.TryCallServiceWithRetry(Action`1 action, String debugMessage, WCFConnectionStateTuple proxyToUse, Int32 numberOfRetries, Boolean doNotReturnProxyOnSuccess, Exception& exception)</Data>
</EventData>
</Event>
Tina M. White Boundless Data

Hello,
Please make sure whether you install exchange 2013 on a DC server. If so, we don't recommend you install Exchange 2013 server and DC server on a server.
Please use ping to check if the server you will install exchange 2013 server on can communicate with DC server.
Please use telnet to check if 890 port is opened on your firewall.
Besides, please refer to the following article to check if you have installed required components again.
http://technet.microsoft.com/en-us/library/bb691354(v=exchg.150).aspx
Cara Chen
TechNet Community Support

Maximum Connections Oracle can provide

I have this query, how many maximum connections does oracle provide to any applications server.
I am aware that the number of connections are configurable. But i wanted to know the maximum number of connections after which there is a possibilty of oracle to crash, or after these particular number connectins oracle wont support any more connections.
Please help me with this, as im in desperate need of a solution.
Thanx for your time.
Nikhil

There is no functional limit to the number of connections Oracle can support. There may be some internal limit (i.e. session ID may be an integer, which would limit you to 4 billion connections on a 32-bit system) but I've never heard of anyone actually hitting such a limit. In reality, you will be constrained by your hardware long before you are constrained by Oracle.
Unfortunately, estimating how many connections your particular hardware can support is not trivial. It depends, obviously, on your hardware, but it also depends on your application and on how your database is configured-- shared server vs. dedicated server would be the largest factor here.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Maximum connections reached

Hi ,
I got an issue in Performance testing. we are not using connection pooling in clinet side. I want to check how many connections still opened , which class it opened when i got Maximum connectioned reached exception. Kindly let me know if any body have idea to solve this .
Thanks in Advance,
Javamine

javamine wrote:
... Performance testing. We are not using connection pooling on client side.
I want to check how many connections are open, which class it opened when i got Maximum connections reached exception.
... anybody have idea to solve this. In the client add code to keep track of how many connections are open
and display this and a stacktrace when you get Maximum Connections Reached Exception.
Even if you were using connection pooling
the database can still reject connections above a certain number of concurrent connections.

Maximum connections on UDP/TCP

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