July 2006 - jboss-dev-forums - Jboss List Archives

[Design of JBoss Collaboration Server] - Re: JBMS Alternate Datastore

by csand101

Thanks for the reply sappenin. The latest topology for a MySQL cluster is a synchronous cluster where the mysqld SQL server is sitting on top of a clustered db engine which is spread across many machines. There is no master or backups. They are equal. This means each node can be used rather than just sitting and waiting for another to fail. So ip takeover is not the answer since wouldn't allow usage of all db nodes. Loadbalancer would work, yes, but getting too complex for a "simple" email instalation since requires 3 layers of hardware just to store an email. What makes sense to me, as a simple solution, is that each JBMS server can use a particluar db node. But then there is the issue as posted of what happens to JBMS when it's db node goes down? There is still at least one more db running on another ip. JBMS just needs to start using a different one. As you mention, if JBMS could manage a pool of connections to different databases in the db farm that would be nice. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959643#3959643 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959643

19 years, 8 months

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[Design of JBossCache] - Re: Reactivating SharedStoreCacheLoader

by galder.zamarreno＠jboss.com

I'm coding the state transfer so that I use cache's get() methods to get the in-memory state and call put on the cache loader (this will happen just before I set the cache loader as "active" (meaning it's the singleton). By doing this, this get methods won't make calls to the underlying cache loader). Secondly, how shall we treat exceptions thrown during this state transfer? Shall we just log them as errors? These calls happen inside TreeCacheListener.viewChange() so it's either that or throw a RuntimeException. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959635#3959635 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959635

19 years, 8 months

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[Design of Kosmos] - Re: serviceResultUpdaterJob not traversing repository

by sstuart4

One more thing I wanted to post... | 2006-07-18 12:02:51,574 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | 2006-07-18 12:02:51,575 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Update job completed. | | 2006-07-18 14:02:51,561 DEBUG [org.quartz.core.JobRunShell] Calling execute on job DEFAULT.serviceResultUpdaterJob | 2006-07-18 14:02:51,562 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | | 2006-07-18 16:02:51,562 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | 2006-07-18 16:02:51,562 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Update job completed. | | 2006-07-18 18:02:51,559 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | 2006-07-18 18:02:51,560 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Update job completed. | | 2006-07-18 20:02:51,554 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | 2006-07-18 20:02:51,554 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Update job completed. | | 2006-07-18 22:02:51,562 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Running scheduled update job... | 2006-07-18 22:02:51,562 INFO [hu.midori.kosmos.server.ServiceResultUpdaterJob] Update job completed. | This is over the course of a day when I am positive that changes where submitted to the repository and it was listed as one of the monitored urls in the portlet.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959621#3959621 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959621

19 years, 8 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Re: Propagation of exceptions to client

by timfox

In the previous mail, please read "...and rethrow a JMSException that does not contain the original *exception*..." View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959619#3959619 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959619

19 years, 8 months

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[Design of Messaging on JBoss (Messaging/JBoss)] - Propagation of exceptions to client

by timfox

I'm wondering what our strategy should be for propagating server exceptions to clients. If an exception occurs on the server side during an invocation of one of the methods on the JMS api, should we a) Wrap it in a JMSException with the original exception as the rootcause in the jmsexception? Problem with this is the class of the original exception might not exist on the client side giving a ClassNotFoundException b) Log the root cause on the server side, and rethrow a JMSException that does not contain the original message. (I lean towards this) c) Something else? Also how should we deal with RuntimeExceptions and Errors? Should we catch these too on the server side and rethrow JMSException? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959618#3959618 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959618

19 years, 8 months

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[Design of Kosmos] - Re: serviceResultUpdaterJob not traversing repository

by sstuart4

Ok, that is what I was trying to accomplish, but I must be missing something.. Where do I specify the repo location to traverse at the specified intervals? If it is in the kosmos-portlet.war portlet.xml, I have tried that under the monitored.urls, but it simply is not gathering any information at the specified times. Over a 24 hour period, it appears not be caching anything, even when changes are going into the repository. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959617#3959617 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959617

19 years, 8 months

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[Design of JBoss jBPM] - Re: MYSQL database connection within JBoss application(using

by kukeltje

WRONG FORUM View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959605#3959605 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959605

19 years, 8 months

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[Design of JBoss Collaboration Server] - Re: Flex 2 Builder Not Free Anymore...

by sappenin

WHEW!!! Sorry, I'm a dummy. Thanks for the clarification on that one. I CAN confirm that the SDK is still free. ;) David View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959598#3959598 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959598

19 years, 8 months

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[Design of JBoss Collaboration Server] - Re: JBMS Alternate Datastore

by sappenin

I can think of a couple alternatives (although, not sure how good they are). 1.) Put the MySql Master (or all of MySql boxes) in a Linux cluster. Imagine 2 boxes in a cluster. I'm pretty sure you can configure it so that one node is a "master", and if it dies, then the other node takes over the "Master's" IP address. You would probably want to separate your storage from any one server in the cluster. (i.e. using a SAN). Plus, I'm not sure if the server that "becomes the Master" can actually be used while it's in waiting (e.g., It may need to be dormant). However, with 3 boxes, you could have a 2-box Linux Cluster, with 1 backup master. If both masters go down, though, then the cluster would fail. Not sure if you can make all the boxes in a cluster "capable of becoming the master". 2.) I believe there are Linux-based Load Balancers with failover capabilities out there. So, you'd have "x" number of Jboss servers connecting to a single IP on the Linux Load balancer server, which would farm requests out to "y" number of MySql Master/Slave boxes NOT in a cluster (even Windows boxes). It seems like the Load-balancer would just heartbeat the downstream boxes, and if one doesn't answer, then mark it as down? I would be curious to hear of any JBoss + Database specific technologies that might be able to address this, too. E.g., does JBoss Cluster technology have any ability to farm database requests out to multiple databse servers? I don't know the answer to that one. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959596#3959596 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959596

19 years, 8 months

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[Design of EJB 3.0] - Re: Transaction leak?

by bill.burke＠jboss.com

have you been able to verify this with a test case? I don't use any WeakHashMaps anywhere really. Are they sure that a transaction timeout was not reached and the tx was marked for rollback? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959559#3959559 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3959559

19 years, 8 months

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jboss-dev-forums July 2006