Log4J and Multiple Servers

Hi, I'm just wondering is there a way that I could have multiple servers running and writing/appending to the same log file?? Java seems to lock for writing and no other servers can append.

Sure. Centralize your logging by setting up another server whose only purpose is to write to that log file. Have all the other servers send their logs to that server. Log4J provides a SimpleSocketServer and a SocketAppender for exactly that purpose.

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Recommended configuration for load balanced Portal with load balancer, multiple gateways and multiple servers.

Does anyone have a recommended network, hardware and software configuration guide for a Portal installation running with multiple gateways load balanced (ie one URL) that talk to multiple servers?

David,
We've used Resonate (software) to load balance the gateways. It allows
you to group all the gateways under 1 virtual URL and load balance the
incoming connections over each gateway depending on the rules that you
define in Resonate. Look in the SUN portal whitepapers there is one that
talks about it specifically.
As far as load balancing the calls to the portals, the gateways will
automatically load balance across all the portals that they know about
using a simple round-robin rotation. You may be able to use Resonate in
front of the portals but you may need to activate persistance within
Resonate to ensure that the user always ends up on the portal that he
established his initial connection on (if you want that), check with Sun
on this one.
David Broeren wrote:
Recommended configuration for load balanced Portal with load balancer,
multiple gateways and multiple servers.
Does anyone have a recommended network, hardware and software
configuration guide for a Portal installation running with multiple
gateways load balanced (ie one URL) that talk to multiple servers?
Try our New Web Based Forum at http://softwareforum.sun.com
Includes Access to our Product Knowledge Base!

Log4j and managed servers

This seems somewhat obvious, but...
 I have a Solaris based WLS 8.1.6 cluster with two managed servers.
 In the log4j.xml for BOTH managed servers, the logs for output from both go to the same file.
 What happens is one managed server writes to dctm_api.log and one writes to the previous log file.
 Is this as simple as Log4J in one of the Managed Servers has the file open and Log4J from two process can't have the same file open and write to it at the same time?
 Thanks,
 Michael Geiser

Static fields won't get serialized.
 Peace,
 Cameron Purdy
 Tangosol, Inc.
 http://www.tangosol.com/coherence.jsp
 Tangosol Coherence: Clustered Replicated Cache for Weblogic
 "rohit" <[email protected]> wrote in message
 news:[email protected]..
 >
 > Hi, can someone please advice if using log4j in the clustered environment
 would
 > in any way result in the failure of in memory session replication. We are
 using
 > WL 7.0 and log4j is installed on each managed servers. The log4j class
 "org.apache.log4j.Logger"
 > is used as a static reference within java classes which are put in the
 session.
 > Any response greatly appreciated. Thanks. Rohit

Log4j and multiple loggers/appenders

Hello,
I have a class that is instantiated multiple times. Each instance needs to write to a separate file which has to be rolled daily.
The example below instantiates SubClass twice; both log files are created successfully -2007-05-09_sc1.log and 2007-05-09_sc2.log-, but the output goes only to 2007-05-09_sc2.log with the following:
09 May 2007 15:00:05,953 INFO [sc2] - writing to class sc1
09 May 2007 15:00:05,953 INFO [sc2] - writing to class sc2
... while 2007-05-09_sc1.log is empty.
Could someone please point out what am I doing wrong?
Thanks in advance.
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.rolling.RollingFileAppender;
import org.apache.log4j.rolling.TimeBasedRollingPolicy;
public class LogTest
    public static void main(String[] args)
        SubClass sc1 = new SubClass("sc1");
        SubClass sc2 = new SubClass("sc2");
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        sc2.writeToLog("writing to class sc2");
class SubClass
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    private static Logger log;
    public SubClass( String name )
        this.name = name;
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        TimeBasedRollingPolicy policy = new TimeBasedRollingPolicy();
        policy.setFileNamePattern("logs/%d{yyyy-MM-dd}_" + name + ".log.zip");
        policy.activateOptions();
        // Create the appender
        RollingFileAppender appender = new RollingFileAppender();
        appender.setLayout(new PatternLayout("%d{DATE} %-5p [" + name+ "] - %m%n"));
        appender.setRollingPolicy(policy);
        appender.activateOptions();
        // Create logger
        log = Logger.getLogger("SubClass." + name);
        log.addAppender(appender);
    public void writeToLog( String txt )
        log.info(txt);
}

Here's my test version that works correctly:class SubClass {
private Logger log;
public SubClass(String name) {
    // Create the appender
    RollingFileAppender appender = new RollingFileAppender();
    appender.setLayout(new PatternLayout("%d{DATE} %-5p [" + name
                    + "] - %m%n"));
    appender.setFile("C:/temp/" + name + ".txt");
    appender.activateOptions();
    // Create logger
    log = Logger.getLogger("SubClass." + name);
    log.addAppender(appender);
public void writeToLog(String txt) {
    log.info(txt);
}I don't have this "policy" business in my version of Log4J so I simplified your code a bit. My version produces two different log files with one line in each file.

Apache, name based virtual hosts and multiple servers.

Hi,
Ive been playing with Apache and name-based virtual hosts for a while now, but, ive been doing it with one single server... now i have the need to forward a name-based request to another server inside the intranet (wich doesnt have a public IP, but a private)...
Something like this:
internet -----> Webserver (name based vhosts) ----> intranet-webserver
Where "webserver" has several domains resolved via name based virtual hosting, and one of those needs to be redirected (or forwarded) to another server on the LAN.
Any ideas on how to do this? i tryed searching the web, but i dont know under which keywords, so i always end on single server virtual hosting help sites.
thanks in advance!

you need to define a virtual server for it..but inside that definition.. define a proxy.
Then the middle webserver, will actually handle the request to the intranet server, on behalf of the internet client..and then pass the traffic to the internet client.
this looks like a reasonable example..
http://www.linuxfocus.org/English/March … le147.html
namely, the section "Mapping Virtual Servers"

EPMA and multiple servers

If I am logged into the EPMA instance on my Production server could I deploy a new application to my Test server which is a seperate box? If not, how would one create a test instance of a Production application? We will be shortly upgrading to 9.3.1 and we are investigating whether to use EPMA or stick with Classic. Thansk.

Hi,
I dont think this is possible.
What you can do though is create your app in Prod and then use the flat file generator to export your app to text file and recreate it in your dev environment. Its not too difficult.
You could also try using the CopyApplication utility.
Seb

Mail Adapter - Multiple mail ID and multiple mail servers config.

Hi All
I am doing BPM synch scenario in which i get the response from SAP box and send the response via email adapter. I am using mail.xsd and doing mail config. in message mapping. However in the TO field i am able to give only one email ID. If i give multiple email ID's mail is not received. I tried comma and semi-colon as separator. Still not working? I have two questions in configuring TO option:
1) How to send to multiple id's? I am using Lotus Notes.
2)How to send to multiple mail servers? I have to send to Lotus Notes id's and outlook express id's also simultaneously.
Thanks for your help in advance
Warm Regards
Samuel

Hi,
Please find here with some observations about it,
1) How to send to multiple id's? I am using Lotus Notes.
If you have specified an IMAP server under URL, the message is saved in the specified folder but is not sent to the receiver specified under To.
Then even if Under To, you had specified the e-mail address that will receive the message would be separated with a semicolon. It will not work.
Please verify about it .
The below link will also help you to verify if there is anything missing
Mail Adapter (XI) - how to implement dynamic mail address
/people/michal.krawczyk2/blog/2005/03/07/mail-adapter-xi--how-to-implement-dynamic-mail-address
BPM:Single Sender and Multiple Receivers based on synchronous
exchange(switch) part-1
/people/prasadbabu.nemalikanti3/blog/2006/03/10/bpmsingle-sender-and-multiple-receivers-based-on-synchronous-exchangeswitch-part-1
Generic Message Interface in SAP Exchange Infrastructure Email Integration Scenarios
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/00d5a235-4803-2a10-f682-889d67c69975
(If your using Alert Framework then)
If you want to send it to multiple email addresses and all email addresses are user of XI then you can define "Role" and attach that role to everyuser and make this role as receipent of alert .
Thanks
Swarup
Thanks
Swarup

How to stop sql services and sql agent services on multiple servers

Looking for a t-sql/powershell script to stop/start sql services on multiple servers. Plan is to execute script from centralized server.
Rahul

see
http://www.databasejournal.com/features/mssql/article.php/3644906/Automatically-Stopping-and-Restarting-SQL-Server.htm
http://sqlpowershell.wordpress.com/2013/04/11/powershell-check-start-and-stop-sql-services-of-a-remote-servers/
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Top Essentials Cache and Multiple Application Servers

Hello,
I'm developing a new servlets/services application in Java using tomcat and playing around with toplink essentials. Is it possible, when using multiple servers, to expire cached objects? Eg I update user account info on server 1, but 2 and 3 still have old data. The documentation and blogs I have read seem to indicate you either have to force a refresh of the object or set up readAllQueries to go direct to the db (which rather defeats the purpose of having a cache?) - for fresh data. Though I agree there are some places where up to the moment data is not always required, building a system to scale with expiry caching across multiple app servers seems like something toplink essentials SHOULD be able to do.
Also, is there any work on when the new rev of Toplink Essentials would be out? I see posts about the 11G preview but that's regular toplink.
Thanks in advance!

There are several caching options in TopLink Essentials to handle stale data.

Some of the settings are available through properties in the persistence.xml, but for most you will need to use a DescriptorCustomizer or SessionCustomizer and use the API of ClassDescriptor (refer to JavaDocs for additional info).

Caching options include:
- Cache Type : (weak, hard, soft, none), a weak cache will decrease stale data.
- Isolated (shared) : You can set the descriptor to be isolated or cache not shared to avoid caching the class.
- Refresh : You can enable refreshing at the class or query level.

A ClassDescriptor does have an invalidation policy, but the policies for invalidating based on a time-to-live or time-of-day were not ported from TopLink to TopLink Essentials, however you could write your own pretty easily.

If you upgrade to using TopLink 11g (preview), which you can download and use under the Oracle OTN license, then you have support for using cache invalidation and cache coordination. This functionality is also available in the Eclipse EclipseLink project currently in incubation.

---
James Sutherland

Packaging and deploying jax ws (webservice) in multiple servers

I am a java developer and new to JAX-WS.
i got one requirement to create a web service using jax-ws, packaging using ant build and deploying it in JBOSS and WEBSPHERE server.
The process which i followed to create a web service below:
 1) created a web service class using @webservice annotation
 2) created a client side artifacts using wsimport which is provided by Jdk and created a war and deployed it jboss.
 3) wsdl is getting generated while deploying a war using a URI - (http://localhost:8080/mywebapplication/routing?wsdl)
 4) create client class to call the webservice. everything is working fine for me.
Need your expert input for the following below:
 1) if i write the ant build script to package the client stubs, how i can use wsdl location in wsimport ant task. should i use URI (wsdl="http://localhost:8080/mywebapplication/routing?wsdl") or
(wsdl="d:/route.wsdl")? which is the best practice?
 2) i want to deploy my webservice in JBOSS and WEBSPHERE in different machine and different port no?
 for e.g
* http://ip1:port1/mywebapplication/route?wdl*
* http://ip2:port2/mywebapplication/route?wdl*
* http://ip3:port3/mywebapplication/route?wdl*
 how to mention dynamic ipaddress and port no while running ant build script?
 how to change the wsdl location and port number in generated wsdl and RoutingService client stubs class dynamically? (dont want to change soad address location manually)
* Do i need to use wsgen to generate server stubs?*
* Need your inputs in packaging and deploying jax ws in multiple servers.*
Thanks in advance.

how to change the wsdl location and port number in generated wsdl and RoutingService client stubs class dynamically? (dont want to change soad address location manually)
Your client stub should look like that...
<code>
@WebServiceClient(name = "MyClientStub", targetNamespace = "http://www.openuri.org/", wsdlLocation = "http://localhost:8080/MyClientStub/MyClientStubProxy/#%7Bhttp%3A%2F%2Fwww.openuri.org%2F%7DMyClientStub?wsdl")
public class MyClientStub
extends Service
public MyClientStub(URL wsdlLocation, QName serviceName) {
super(wsdlLocation, serviceName);
</code>
You can use the constructor above, like that...
<code>
URL baseUrl = MyClientStub.class.getResource(".");
URL url = new URL(baseUrl, "http://your-server:your-port-no/MyClientStub/MyClientStubProxy/#%7Bhttp%3A%2F%2Fwww.openuri.org%2F%7DMyClientStub?wsdl");
 MyClientStub stub = new MyClientStub(url, new QName("http://www.openuri.org/", "MyClientStub");
</code>

Collecting Notifications from multiple servers and applications

Hi,
I'm researching JMX technology for our Enterprise-wide monitoring needs.
I've got a good understanding of how to create jmx connections and instrument resources for monitoring in a 1-to-1 jmx client to application scenario.
However, I need to manage (and collect notification alerts) from multiple servers/applications.
Any ideas where to start learning how to do this?
Thanks,
Jon

Hi Gavin,
So, you're looking into JMX monitoring solutions too. great! I've collected some good links and examples.
You can email me privately at jcolby550 "at" hotmail "dot" com, maybe we can share ideas.

WLC 4400 and multiple authentication servers e.g. RADIUS, ACS

WLC 4400 and multiple authentication servers e.g. RADIUS, ACS
Can the WCL 4400 be set up to use multiple RADIUS servers? The user accounts for accessing wireless would use a RADIUS server. The administrative accounts for the WLC would reside on an ACS server.

Yes, that is correct. You can set acs to use both radius and tacacs.
For this you need to add WLC twice in acs-->network configuration. But you need to keep host name different.
eg 1) Host name WLC --->IP x.x.x.x -->Auth using -->radius
2) Host name WLC1--->IP x.x.x.x --->Auth using -->Tacacs.
You need to set up tacacs commands on WLC along with radius commands.
Regards,
~JG
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Is it possible to deploy SharePoint or its Service Applications on: multiple DB-Servers and multiple SQL Instances?

Hello Forum,
We have a SharePoint 2013 farm (Enterprise edition) that uses one single SQL Server 2012 (Standard edition). That statement means: All my SharePoint DBs e.g. (Config, Admin, Content, and Service Apps) DBs are hosted and running onto one single instance e.g.
Server1\SQLInstance1.
We have some new requirements to install and configure BI tools such as: PerformancePoint services and PowerPivot. BI tools require either SQL Server 2012 Enterprise or BI editions, and we do NOT want to upgrade our current SQL Server1\SQLInstance1
Instead, We have other separate SQL Server instance which is enterprise edition let's name it (ServerX\InstanceX) that is running standalone, and we are thinking or using it, and my 2 questions are:
1) Can we use this other separate
SQL Server instance which is enterprise edition to host the create and hosts the DBs of PerformancePoint services and PowerPivot ?
2) My second question is the same: Can I create PerformancePoint services application in my SharePoint farm, But in the Database Server field, I fill up
the details of the other DB server ServerX\InstanceX which is the one that is SQL
enterprise edition ? Will this work ?
Any official Microsoft resources/links tell that it is possible to deploy SharePoint or its service applications on multiple DB-Servers and multiple SQL Instances?

Thank you Alex and Anil,
What are the ramifications of that?
I mean, Assuming that I have created such a farm where most of SarePoint DBs in Standard SQL instance while the PerformancePoint service application and others e.g. PowerPivot and reporting service are deployed and configured onto other Enterprise SQL instance.
Are there any recommendations or concerns that you would like to draw my attention to ?

Using MDT and Thin installer on multiple servers

Is there a way to configure the thininstaller.exe.configuration to point to a dynamic path. We have multiple locations where MDT is deployed, and we don't want the PC to connect over our WAN links when the Thin Installer runs.
I thought I read somewhere that in the file I could do something like this:
<Default Gateway>
 <10.10.1.1=\\Location1\repository>
 <10.10.2.1=\\Location2\repository>
 <10.10.3.1=\\Location3\repository>
 <*.*.*.*=\\DefaultLocation\repository>
I checked the Integrating ThinkVantage Update and Retriever and ThinInstaller with MDT 2010, but the part that talks about configuring the file makes no mention of using multiple servers.
Thanks

There is not a mechansim as you describe built into ThinInstaller. There are, however, various ways you can invoke Thin Installer which might accommodate your end goal.
Usually people that have this need have some kind of data value on the target device that lets them know which repository they should be pulling from. Sometimes a network share is used and that share is established earlier in the deployment process to point to a local server. Sometimes an environment variable is used. The command line of ThinInstaller allows for you to specify the path to the repository at execution time. The calling of ThinInstaller can be performed by a script or cmd file that determines the correct repository path to pass to ThinInstaller.
You can find more details on controlling ThinInstaller in this document: http://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkvantage_en/tvsu4_mst_en.pdf
Without knowing a lot more details about your environment I'm not sure how to better guide you. You might try posting in the Enterprise / IT Management forum and see if any of the folks there have done this already.

Multiple servers and multiple clients on one machine

Hi,
I was hoping someone could give me some direction as to how to go about creating multiple servers and muliple clients on the one computer using RMI and threads. I intend to have say 4 servents (able to perform both client and server methods) running on the one computer, with the clients being able to connect to each of the servers. (I'm doing this to emulate using 4 computers, which I don't have!). I know I have to use different ports to do this. How do I go about the following using RMI - start up a server (port number as argument from command line?), which starts a thread listening for connections from the other clients.. when a new connection is established between server and client, then start a new thread which 'handles' that connection.
The examples I've seen of RMI only deal with single server and single client... I'd appreciate any suggestions as to how to go about this problem!!

Hi,
I suggest not to use the rmiregistry program at all
but to start the registry in a program of your own.
Then you can specify all you need (url, port, even
client and server socket) as command line argument.
You need something like this:
Registry registry = null;
Remote server = null;
try
{ // this succeeds if the registry already runs
registry = LocateRegistry.getRegistry(yourRegistry);
server = registry.rebind( yourServer );
}catch( RemoteException )
{ // no registry reachable, create one
registry = LocateRegistry.createRegistry(yourRegistry);
server = registry.rebind( yourServer );
}Have fun,
wiedkla

Log4J and Multiple Servers

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