MDB behaviour in Clustered environment

Hi, I am a bit confused with regards to how a message delivery will behave in a clustered environment on a app server.
As far as Queue is concerned, I am clear that it will be delevered to one and only one of the MDBs.
But for Topic, how can load balancing effect the Topic subscriptions? Does the Topic then behave in the same manner as the Queue?
I have a J2EE app that is running in clustered env( can be any app server). It has one MDB. I need to send messages to all the application instances at the same time. I am not sure if this solution will work in a clustered environment with JMS load balancing, and I am afraid that this solution will misbehave. Hence the question :)

Delivery to topics is based on subscriptions. One copy of a message is delivered to each subscription. A subscription is identified (in most providers) by the combination of the client id and subscription name. In a clustered environment, each node of the cluster will have a different client id and therefore get a different copy of a message.
Some JMS providers allow for something called group or shared subscriptions where the client id is removed from the subscription identifier and replaced by a group id. This allows two nodes in a cluster to share a subscription to a topic allowing whichever client is up to consume exactly one copy of a message among all nodes in a cluster.
I have to admit that I haven't gotten around to implementing such a feature in my own JMS implementation, but it is on the list.
Dwayne
============
http://dropboxmq.sourceforge.net

Similar Messages

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          Ferruccio


No. If you need this type of functionality, use Coherence.
          http://www.tangosol.com/coherence.jsp
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          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Ferruccio" <[email protected]> wrote in message
          news:[email protected]..
          > Hi,
          > I have a very basic question. In a WebLogic clustered
          > environment, is a Singleton replicated? In other words, if the
          > mySingleton on node A in a cluster is updated with a piece of data,
          > will this show in the mySingleton in node B?
          >
          > Thanks
          >
          > Ciao
          > Ferruccio

File resources in clustered environment

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          Praveen Peddi wrote:
          > I understand that resource on file system cannot be clustered.
          > We have an application packaged as an ear file but unfortunately we get the properties
          > files from the file system. We usually copy these resources while installing our
          > application.
          >
          > Now we are trying to deploy our application in a clustered environment and when
          > all my servers in the clcuster r on the same machine everything worked fine. Now
          > I created another server on a different machine.
          > The ear file file got transfered fine but the application is not able to find
          > the properties since the resource file are not copied over to that machine. I
          > know this is an expected behaviour but my question is: Is there anyway workaround
          > to avoid thsi problem. For example, can we tell weblogic to take care of copying
          > these resources along with the whole application
          > (ear file).
          >
          > Praveen

InvalidClientId on Clustered Environment

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Hi Josh,
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          Josh Zook wrote:
          > I am running into a problem where a get "weblogic.jms.common.InvalidClientIDException:
          > Client id, testDesintation, is in use" when running in a clustered environment.
          > In the code, I dynamically set the clientId on the TopicConnection using setClientID().
          > The class that does this is called from a Stateless Session EJB (clustered) which
          > is called from a MDB (clustered).
          >
          > I believe this is from node1 setting the clientId to 'x', and before node1 has
          > closed the connection, node2 opens a connection, setting the clientId to 'x'.
          >
          > This is how I actually need it to perform. Each node may need to publish messages
          > to the same destination around the same time. This is because the clustered MDB
          > is what prompts the publish to the next destination.
          >
          > What is the suggested approach for a problem such as this? Is the only solution
          > not to cluster the MDB, so that only one node may be publishing to the Topic at
          > one time?
          >
          > Any suggestions?
          >
          > jz

Topics and Clustered Environment

Hi,
We have an application that is to be hosted on a clustered environment (2 nodes), for load balancing/fail over. This application consumes JMS messages (from Sonic JMS via Foreign Server).
During development (single node), we have had our application consuming messages from a Topic, meaning that several environments could get copies of the same message. In the clustered environment however, we would only want one of the application pair to consume and process any one message (not both).
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If anything is not clear, please let me know and i'll try and clarify.
Thanks for any advice...

Another option would be to use an intermediate Queue, which consumes messages from a Topic, and the application pair then consume messages from this Queue >meaning only one will get any particular message. Is this a good way to go?This looks feasable, only issue would be there is nothing out of the box in wls which gets the message from the remote topic to the queues. You will have to use either a message bridge or a pass thru mdb targeted on a single server to get this done. You might have to then worry about HA if this server goes down. Any how wait for Tom who might be here soon with the expert advice..

JMS in Clustered Environment

Hi All,
We have a clustered environment ; instance A and B of the same application server is running. Both the servers are configured for a JMS queue. But when I send message to the queue to refreh certain data, only one server is getting refreshed.
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Regards
Sajitha

Hi,
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www.arjuna.com

Resource Adapters in clustered environment

Hi All,
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This question falls outside of JMS-land. Perhaps you can try the EJB newsgroup?
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Issue in Synchronous File Read in clustered environment

Hi,
We are using clustered environment (4 managed servers) in Unix. In a OSB 11gR3 proxy service we are using Synchronous File Read. Randomly we are getting the below error. Let us know what could cause the issue. But the same code is working fine in a single stand-alone server configuration.
Error Code : BEA-380002 , Error Reason : Invoke JCA outbound service failed with connection error, exception: com.bea.wli.sb.transports.jca.JCATransportException: oracle.tip.adapter.sa.api.JCABindingException: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/wsdlPathAndName [ SynchRead_ptt::SynchRead(Empty,body) ] - WSIF JCA Execute of operation 'SynchRead' failed due to: No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content ; nested exception is:
BINDING.JCA-11007
No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderNamer/Filename.txt to be processed was not found or not available or has no content Please make sure that the file exists in the specified directory.
com.bea.wli.sb.transports.jca.JCATransportException: oracle.tip.adapter.sa.api.JCABindingException: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/wsdlPathAndName [ SynchRead_ptt::SynchRead(Empty,body) ] - WSIF JCA Execute of operation 'SynchRead' failed due to: No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content ; nested exception is:
BINDING.JCA-11007
No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content Please make sure that the file exists in the specified directory.
at com.bea.wli.sb.transports.jca.binding.JCATransportOutboundOperationBindingServiceImpl.invoke(JCATransportOutboundOperationBindingServiceImpl.java:153)
at com.bea.wli.sb.transports.jca.JCATransportEndpoint.sendRequestResponse(JCATransportEndpoint.java:209)
at com.bea.wli.sb.transports.jca.JCATransportEndpoint.send(JCATransportEndpoint.java:170)
at com.bea.wli.sb.transports.jca.JCATransportProvider.sendMessageAsync(JCATransportProvider.java:598)
at sun.reflect.GeneratedMethodAccessor1115.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.wli.sb.transports.Util$1.invoke(Util.java:83)
at $Proxy142.sendMessageAsync(Unknown Source)
at com.bea.wli.sb.transports.LoadBalanceFailoverListener.sendMessageAsync(LoadBalanceFailoverListener.java:148)
at com.bea.wli.sb.transports.LoadBalanceFailoverListener.sendMessageToServiceAsync(LoadBalanceFailoverListener.java:603)
at com.bea.wli.sb.transports.LoadBalanceFailoverListener.sendMessageToService(LoadBalanceFailoverListener.java:538)
at com.bea.wli.sb.transports.TransportManagerImpl.sendMessageToService(TransportManagerImpl.java:558)
at com.bea.wli.sb.transports.TransportManagerImpl.sendMessageAsync(TransportManagerImpl.java:426)
at com.bea.wli.sb.pipeline.PipelineContextImpl.doDispatch(PipelineContextImpl.java:670)
at com.bea.wli.sb.pipeline.PipelineContextImpl.dispatchSync(PipelineContextImpl.java:551)
at stages.transform.runtime.WsCalloutRuntimeStep$WsCalloutDispatcher.dispatch(WsCalloutRuntimeStep.java:1391)
at stages.transform.runtime.WsCalloutRuntimeStep.processMessage(WsCalloutRuntimeStep.java:236)
at com.bea.wli.sb.stages.StageMetadataImpl$WrapperRuntimeStep.processMessage(StageMetadataImpl.java:346)
at com.bea.wli.sb.stages.impl.SequenceRuntimeStep.processMessage(SequenceRuntimeStep.java:33)
at com.bea.wli.sb.pipeline.PipelineStage.processMessage(PipelineStage.java:84)
at com.bea.wli.sb.pipeline.PipelineContextImpl.execute(PipelineContextImpl.java:1055)
at com.bea.wli.sb.pipeline.Pipeline.processMessage(Pipeline.java:141)
at com.bea.wli.sb.pipeline.PipelineContextImpl.execute(PipelineContextImpl.java:1055)
at com.bea.wli.sb.pipeline.PipelineNode.doRequest(PipelineNode.java:55)
at com.bea.wli.sb.pipeline.Node.processMessage(Node.java:67)
at com.bea.wli.sb.pipeline.PipelineContextImpl.execute(PipelineContextImpl.java:1055)
at com.bea.wli.sb.pipeline.Router.processMessage(Router.java:214)
at com.bea.wli.sb.pipeline.MessageProcessor.processRequest(MessageProcessor.java:96)
at com.bea.wli.sb.pipeline.RouterManager$1.run(RouterManager.java:593)
at com.bea.wli.sb.pipeline.RouterManager$1.run(RouterManager.java:591)
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at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:146)
at com.bea.wli.sb.security.WLSSecurityContextService.runAs(WLSSecurityContextService.java:55)
at com.bea.wli.sb.pipeline.RouterManager.processMessage(RouterManager.java:590)
at com.bea.wli.sb.transports.TransportManagerImpl.receiveMessage(TransportManagerImpl.java:375)
at com.bea.wli.sb.transports.jca.binding.JCATransportInboundOperationBindingServiceImpl$4.run(JCATransportInboundOperationBindingServiceImpl.java:415)
at com.bea.wli.sb.transports.jca.binding.JCATransportInboundOperationBindingServiceImpl$4.run(JCATransportInboundOperationBindingServiceImpl.java:413)
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at weblogic.security.Security.runAs(Security.java:61)
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at com.bea.wli.sb.transports.jca.binding.JCATransportInboundOperationBindingServiceImpl.invokeOneWay(JCATransportInboundOperationBindingServiceImpl.java:126)
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at oracle.tip.adapter.fw.jca.messageinflow.MessageEndpointImpl.onMessage(MessageEndpointImpl.java:502)
at oracle.tip.adapter.file.inbound.Publisher.onMessageDelegate(Publisher.java:493)
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at oracle.tip.adapter.file.inbound.InboundTranslatorDelegate.xlate(InboundTranslatorDelegate.java:484)
at oracle.tip.adapter.file.inbound.InboundTranslatorDelegate.doXlate(InboundTranslatorDelegate.java:121)
at oracle.tip.adapter.file.inbound.ProcessorDelegate.doXlate(ProcessorDelegate.java:388)
at oracle.tip.adapter.file.inbound.ProcessorDelegate.process(ProcessorDelegate.java:174)
at oracle.tip.adapter.file.inbound.ProcessWork.run(ProcessWork.java:349)
at weblogic.work.ContextWrap.run(ContextWrap.java:41)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:528)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:176)
Caused by: oracle.tip.adapter.sa.api.JCABindingException: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/wsdlPathAndName [ SynchRead_ptt::SynchRead(Empty,body) ] - WSIF JCA Execute of operation 'SynchRead' failed due to: No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content ; nested exception is:
BINDING.JCA-11007
No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content Please make sure that the file exists in the specified directory.
at oracle.tip.adapter.sa.impl.JCABindingReferenceImpl.request(JCABindingReferenceImpl.java:259)
at com.bea.wli.sb.transports.jca.binding.JCATransportOutboundOperationBindingServiceImpl.invoke(JCATransportOutboundOperationBindingServiceImpl.java:150)
... 56 more
Caused by: oracle.tip.adapter.sa.impl.fw.ext.org.collaxa.thirdparty.apache.wsif.WSIFException: servicebus:/WSDL/wsdlPathAndName [ SynchRead_ptt::SynchRead(Empty,body) ] - WSIF JCA Execute of operation 'SynchRead' failed due to: No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content ; nested exception is:
BINDING.JCA-11007
No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content Please make sure that the file exists in the specified directory.
at oracle.tip.adapter.sa.impl.fw.wsif.jca.WSIFOperation_JCA.performOperation(WSIFOperation_JCA.java:662)
at oracle.tip.adapter.sa.impl.fw.wsif.jca.WSIFOperation_JCA.executeOperation(WSIFOperation_JCA.java:353)
at oracle.tip.adapter.sa.impl.fw.wsif.jca.WSIFOperation_JCA.executeRequestResponseOperation(WSIFOperation_JCA.java:312)
at oracle.tip.adapter.sa.impl.JCABindingReferenceImpl.invokeWsifProvider(JCABindingReferenceImpl.java:350)
at oracle.tip.adapter.sa.impl.JCABindingReferenceImpl.request(JCABindingReferenceImpl.java:253)
... 57 more
Caused by: BINDING.JCA-11007
No Data to process.
No Data to process.
File /root/oracle/domains/osb/11.1.1.4/cluster/data/osb2/FolderName/Filename.txt to be processed was not found or not available or has no content Please make sure that the file exists in the specified directory.
at oracle.tip.adapter.file.outbound.FileReader.readFile(FileReader.java:277)
at oracle.tip.adapter.file.outbound.FileReader.executeFileRead(FileReader.java:181)
at oracle.tip.adapter.file.outbound.FileInteraction.executeFileRead(FileInteraction.java:331)
at oracle.tip.adapter.file.outbound.FileInteraction.execute(FileInteraction.java:395)
at oracle.tip.adapter.sa.impl.fw.wsif.jca.WSIFOperation_JCA.performOperation(WSIFOperation_JCA.java:529)
... 61 more
Edited by: 842347 on Jul 6, 2011 3:11 AM

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[2011-07-20T15:16:07.954-04:00] [Framework] [NOTIFICATION] [upgrade.Framework] Finished upgrading components.
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Question….can you use upgrade assistant in clustered environment?
Thanks!

You can only use the upgrade assistant to upgrade to a single instance Oracle BI 11g server. Typically this is a sandbox server environment or a VM that can simply be wiped clean after the upgrade. Then move the RPD,WebCat, etc. and AppRoles that get created during the upgrade process to a development server. The UA is looking for a single instance installation environment and that environment should be clean/fresh to avoid confusion and conflicts.
Please award points if helpful.

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Hi all,
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thanks in advance
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Dear Aravindth
(.*?) means -> Select all contents from where you start and end,
For Ex. <month>(.*?)</month> then Select for start <month> and end last </month> tag.
(?) Match zero or one occurrences. Equivalent to {0,1}.
(*) Match zero or more occurrences. Equivalent to {0,}.
(+) Match one or more occurrences. Equivalent to {1,}.
(.) (Dot). Match any character except newline or another Unicode line terminator.
(.*?) means -> Zero or more times Match any character except newline or another Unicode line terminator + Match zero or more occurrences. Equivalent to {0,}.+Match zero or one occurrences. Equivalent to {0,1}.
Could you please refere the below cite :
http://www.javascriptkit.com/jsref/regexp.shtml
Thanks & Regards
T.R.Harihara SudhaN

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This is a known problem with clustered environment. Remember that your portal component runs on just on dialog instance and it doesn't automatically have access to the other nodes. However, there are some ways to get around this
1. Use KM to store files. KM is a common repository for all application servers and therefore you needn't worry more
2. Use an external batch oriented product (suresync/robocopy) to synch folders on the different DIs. You basically use your existing portal component, but there is a batch job which makes sure the upload folder is identical on all DIs (however, there is a slight delay depending on how often you run the batch job)
3. Store the files on a shared disk directly from the portal component.
Cheers
Dagfinn

Issue while polling in clustered environment.

Hi All,
I am using a polling adapter which polls records from two database tables. I have set Database rows per transaction as 10 and polling interval as 30 secs. Our servers are running in clustered mode.
The issue is that, when the rows are picked by node 1 , without waiting for the polling interval node 2 picks up the next set of rows from database.
As per our requirement, rows should be polled according to the value of Database rows per transaction size. Then adapter should wait for the polling interval and then pick up the next set of rows (in the clustered environment only). Can it be achieved using custom SQL or some java code. If anyone has tried it please help me.
Thanks in advance.

See this is misconception that both nodes picks the data in turn one by one.
It totally depends on the availability of the nodes. This is how a typical active active cluster should behave.
Both nodes will show similar set of instances as they are pointing to same soa_infra schema.
We can not differentiate by checking EM that which node actually processed a particular instances.
I would like to know how are you sure that both nodes are picking file one by one without waiting other one to complete its job.
I have experience with Active active cluster with uses of DB Adapter in many scenarios. But I never observed this behavior.
Probably by understanding your applications architecture, answer to your problem can be found.
Thanks,
Ashu

File Protocol in OSB Clustered Environment

Hi ,
I have a OSB Server in a Clustered Environment ....
Here Admin Server is in Machine1
Managed Server1 is in Machine 2
Managed Server2 is in Machine 3
so both the Managed Servers are put in a Cluster
I have Access to Machine1 Unix Box where the Admin Server is Installed ...I can get the File only in this Location and have to Read the Same from here , So i was planning to Use File Protocol for Polling the Message from Admin Server .Since OSB has option for Selecting only the Managed Server , I would request suggestions how i can Read the Data from this Admin Server by using File Protocol .

have you used "service type" as "Messaging Service" ? that should give you all the options you need

Not able to access the application through URL in clustered environment.

Hi,
I recently depoyed my application on clustered environment of weblogic 8.1 SP4.
Now I am able to access the application through the managed server name with port number but not able to access through URL.
For ex
http://machine1:7001/test/login.do?m=begin
this is accessible
If I use
http://test.domain.com/test/login.do?m=begin
Then application is not accessible.
any HTML or JSP page page is in reach by both the URL.
Please suggest me what should I do in this regard.
thanks
singhV

Hi Syed,
I meant to ask are you able to see the application you created in Hyperion Planning Login page,if yes try accessing the created application through Hyperion Planning(Try restarting Planning Services once even if you are able to launch hyperion planning page) url "http://servername:8300/HyperionPlanning and selecting the application you created.
And also could you please let me know if you are logging in to workspace through admin username ? and also check if you are able to see the application in shared services and try to provision any group on that application.
(The Assumptions are if application is not created successfully then it will not be available in workspace to launch and if its in maintainance mode (Application Maintenance Mode) in Application Settings and last would be check OHS and Hyperion Planning Services)
Thanks
Amith

MDB behaviour in Clustered environment

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