Exception thrown if one server is brought down - consumer closed

Hi,
I'm using Sun App Server 7.0 to host our web app.
We are using JMS to send and receive messages between the 2 servers in the farm.
We use the "imqAddressList" property of the "ConnectionFactory" to list the Hot names for subscription.
If we bring down one of the app servers, the other server throws the following exception:
javax.jms.IllegalStateException: [C4063]: Cannot perform operation, consumer is closed.
     at com.sun.messaging.jmq.jmsclient.Consumer.checkState(Consumer.java:279)
     at com.sun.messaging.jmq.jmsclient.MessageConsumerImpl.checkReceive(MessageConsumerImpl.java:154)
     at com.sun.messaging.jmq.jmsclient.MessageConsumerImpl.receive(MessageConsumerImpl.java:369)
     at com.ams.framework.jms.JMSSubscriberThread.run(Unknown Source)
Is there any workaround for this issue:
Is there a way to stop the connection attempt at this point?
Please advice.
Thanks
Shekhs

Some of you need would be better suited to the application server forum, but let's see if I can provide some help. Now, the following doesn't account for any licensing restrictions you may have, so you'll have to be the judge of that.
Predicate 1. You can have as many brokers as you need.
Predicate 2. A server can attach to any broker regardless of its location.
Predicate 3. A SJS MQ cluster is not the same thing as an application server cluster. Make sure you are clear when you are mentioning a broker.
Predicate 4. A SJS MQ cluster is used primarily for load balancing.
Based on P1, you should start at least one broker per development stage. This will prevent load testing, for example, to affect development and production. (Not necessarily true if they are on the same machine, but I digress)
Now, I'm pretty rusty on my app server skills, but since an application server instance can connect to any number of brokers, you would be able to get an application server instance, for test for example, to connect to testBroker A, and another application server instance, for production, to connect to prodBrokerA. Now since the MQ cluster is a function of the JMS layer, unknown to the application server, nothing prevents you from doing an MQ cluster between prodBrokerA and prodBrokerB (for application server instance B), and another cluster for testBrokerA and testBrokerB.
Once that is done, you can think of clustering the application servers A and B, but that chat belongs to another forum....
With all of that, you need to make sure your machines have enough resources (CPU, Memory and I/O) to support all of that software....
HTH

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"howard spector" <[email protected]> wrote in message news:[email protected]...
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Hi YesYemPee,
I have tried but still not clear about your issue, I would like you provide more details information about your issue based on below points to better analysis about the issue:
What action did you do and caused the error "A severe error occurred on the current command. The results, if any, should be discarded", did you run report on the web application or something else then the error happen?
If you rendering the report and got the error, please try to provide us more error information in the log files which path like:
C:\Program Files\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\LogFiles
If it is not the case in step1, Please try to provide SQL Server Error log(SQL Server Logs) and more details information.
If you still have any problem, please feel free to ask.
Regards,
Vicky Liu
Vicky Liu
TechNet Community Support

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the webmail is running fine.
the webservers are running fine without errors.
i tried shifting mesaging services on to both nodes, but the error persists.
can any one pl. help me ??

Hi,
I hope below link will help you.
http://knowledgebase.iplanet.com/ikb/kb/articles/4761.html
Thanks,
Daks.

Find all unchecked exceptions thrown by method?

Dear all,
I am writing critical code that must be correct. Thus, I wish to know that I have not overlooked any important unchecked exceptions. I am aware that the distinction between unchecked and checked exceptions is controversial, and I know the difference between these types of exceptions.
I would like to see for each function a list of all possible exceptions a method can throw. Preferably I would like a tool to do this for me, but I would write something myself if there is a reasonably simple way to do it.
More precisely, I would like to be able to define the set of "unchecked" exceptions myself, e.g., I would put down NullPointerException as "unchecked", but I would let IOException be checked (in my particular application, not in general). In general, this would however be a very nice language feature that could perhaps be a compromise in the (un)checked exceptions-controversy. Each programmer could define an "unchecked"-filter. Perhaps it would best be viewed as a kind of lint.
In any case, I have not found any tool, and it seems I can not do it myself with reflection, since it only gives access to declared exceptions, i.e., if the JDK-programmer decided not to put IOException in the signature of a method, then reflection can not see that the method may throw such an exception.
Does anybody know how to do this?

Douglas1024 wrote:
Thank you for your time, but I am well aware how one uses exceptions in normal code.
From an abstract point of view exceptions are simply a form of outputs from a method. Thus, if the goal is to write correct and easily verifiable code, in contrast to the vast majority of code that simply works reasonably, it is quite meaningful to know exactly what kinds of exceptions are thrown by a method and when.
Please note my correction regarding IOException.Millions upon millions of lines of correct code have been written following these standard java exception principles. The notion that you can write "better" code by detailing every single unchecked exception that could possibly be thrown is ludicrous. In fact by handling unchecked exceptions you will in all likelihood do more harm than good, hence why they are unchecked in the first place.

Additional uncaught exception thrown while handling exception.

Hello all! I am *trying* to surf around the internet and do a little online shopping. I keep getting this error though and it is really bugging me/ruining my night. I am about ready to through my computer at a wall.
Here is the error:
Additional uncaught exception thrown while handling exception.
Here is the full error as it appears on my screen:
Additional uncaught exception thrown while handling exception.
Original
RedisException: Redis server went away in Redis->setOption() (line 23 of /home/www/usa.hunter-boot.com/htdocs/drupalroot/sites/all/modules/contrib/redis /lib/Redis/Client/PhpRedis.php).
Additional
RedisException: Redis server went away in Redis->setOption() (line 23 of /home/www/usa.hunter-boot.com/htdocs/drupalroot/sites/all/modules/contrib/redis /lib/Redis/Client/PhpRedis.php).
It is REALLY bugging me. I don't know that much about computers other then the basics. I only use mine to write papers and go on the internet so if someone is nice enough to try and help me fix this issue then please don't use fancy tech lingo (dumb it down for me). Thank you!

That's a problem on the web server, not on your computer.

Uncaught exceptions thrown in overridden ThreadGroup.uncaughtException

Hi,
To process uncaught exceptions in threads I spawn, I have created a ThreadGroup and overridden the uncaughtException method. This works flawlessly, but it brought up the following question:
What happens to an exception that is thrown in an overridden uncaughtException method that is not caught?
I assumed that an uncaught exception in an uncaughtException method would call the uncaughtException method in the parent thread group, but this does not seem to be the case. The uncaught exception just seems to disappear.
Can somebody please confirm my finding that an uncaught exception thrown there just disappears and does not get handled anywhere else? Can somebody point me to the right sections of the Java Language Specs or the JVM Specs that deal with this issue?
Below is a test program that I wrote to investigate. It throws an exception in an "outer thread", part of an "outer group" thread group; an exception in an "inner thread", part of an "inner group" thread group; and an exception in the uncaughtException method of the "inner group" thread group. I expected that the first two invoke the uncaughtException of the "outer group", while the last one invokes the method of the "inner group". Contrary to my expectations, the exception thrown in the uncaughtException method of the "inner group" does not seem to invoke anything.
Thanks in advance.
Yours,
--Mathias
public class ThrowInUncaughtExceptionHandler {
public static void main(String[] args) {
(new ThrowInUncaughtExceptionHandler()).run();
public void run() {
ThreadGroup outerGroup = new ThreadGroup("outer") {
public void uncaughtException(Thread t, Throwable e) {
System.out.println("in outerGroup.uncaughtException: "+e);
final Thread outerThread = new Thread(outerGroup, new Runnable() {
public void run() {
System.out.println("in outerThread.run");
System.out.println("\tthread group: "+Thread.currentThread().getThreadGroup());
System.out.flush();
ThreadGroup innerGroup = new ThreadGroup("inner") {
public void uncaughtException(Thread t, Throwable e) {
System.out.println("in innerGroup.uncaughtException: "+e);
System.out.println("\tthrowing another exception...");
throw new RuntimeException("thrown in innerGroup.uncaughtException");
final Thread innerThread = new Thread(innerGroup, new Runnable() {
public void run() {
System.out.println("in innerThread.run");
System.out.println("\tthread group: "+Thread.currentThread().getThreadGroup());
System.out.flush();
throw new RuntimeException("thrown in innerThread");
innerThread.start();
try { innerThread.join(); }
catch(InterruptedException ioe) { /* ignore */ }
throw new RuntimeException("thrown in outerThread");
outerThread.start();
}

Hi tigerxx:
Thank you for your reply. Unfortunately, your suggestion does not help. I had tried it already, even though according to the Java API Javadocs, this is not necessary anyway: If no thread group is specified as parent of a thread group, then the current thread's thread group is used. Since innerGroup is created by a thread in outerGroup, innerGroup's parent is outerGroup.
Thanks again, though, for taking the time to read and reply.
--Mathias

Can the servlet/jsp engine be brought down

Hello,
          Can the servlet/jsp engine be scheduled for a "in-house patch" not affecting
          the EJB Container? That means the jsp/servlet engine is brought down.
          (HotDeploy is a development feature). Does any version of WebLogic provide
          any way to do this?
          It is a single VM and I suppose that this is not possible. Just thinking out
          loud!!
          Thanks
          Gaurav


Sorry, but there's no way to apply a hot-patch to the server. Good idea, but
          very tricky to implement!
          If you were using a cluster with session-replication, you can cycle the
          servers one at a time. The other servers will pick up where the
          downed-server was working. You can then apply the patch, and bring up the
          server again. Give it a few minutes (an hour to be safe!) to replicate from
          the running server, then cycle the other server safely.
          Alex
          "Gaurav Khanna" <[email protected]> wrote in message
          news:3c7c1256$[email protected]..
          > Hello,
          >
          > Can the servlet/jsp engine be scheduled for a "in-house patch" not
          affecting
          > the EJB Container? That means the jsp/servlet engine is brought down.
          > (HotDeploy is a development feature). Does any version of WebLogic provide
          > any way to do this?
          > It is a single VM and I suppose that this is not possible. Just thinking
          out
          > loud!!
          >
          > Thanks
          > Gaurav
          >
          >
          >
          >

Exception thrown if one server is brought down - consumer closed

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