August 2010 - jboss-user - Jboss List Archives

Re: [jboss-user] [Performance Tuning] - Configuration of Datasource: min-pool-size and max-pool-size

by Peter Johnson

Peter Johnson [http://community.jboss.org/people/peterj] replied to the discussion "Configuration of Datasource: min-pool-size and max-pool-size" To view the discussion, visit: http://community.jboss.org/message/555457#555457 -------------------------------------------------------------- What percentage of the requests made by a user require a database connection? How many database connections does a typical request require? Typically, how many simultaneous requests are made? Once you answer those questions, then you will know how many connections to provide. For example, if only 50% of the requests require a single connection, and usually there are only 5 requests being simultaneously processed, then 3 connections is sufficient. Another way to do this is to test it. Run with max connectiosn set to a large number of connections,say 100, and min connections set low, say 2 connections. Then monitor the number of active connections over the course of a day. That should tell you how many you need. You should also monitor the number of queued connection requests. Let's say you used the first example and set max connections to 3. Yet you notive that quite often you have as many as 4 queued connection reqeusts, then you should increase the max connections to 7. Another thing to consider is that you can always set max connection to a high number, say 100, and set min connections to your typical usage, say 7 to keep with the prior example. You will only ever have more than 7 connections if you actually need them. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555457#555457] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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[JBoss Messaging] - Manual JBoss Messaging recovery recovery

by Bozhidar Batsov

Bozhidar Batsov [http://community.jboss.org/people/bozhidar] created the discussion "Manual JBoss Messaging recovery recovery" To view the discussion, visit: http://community.jboss.org/message/555450#555450 -------------------------------------------------------------- I'm aware of the configuration changes needed to enable XA recovery for JBoss Messaging resources listed in chapter 8 of the manual ( http://docs.jboss.org/jbossmessaging/docs/userguide-1.4.0.GA/html/recover... http://docs.jboss.org/jbossmessaging/docs/userguide-1.4.0.GA/html/recover...). I was wondering however is there a manual way to trigger the recovery? I was also wondering about some of the details of the work of the XA recovery - does recovery happen after a container crash/restart cycle? What kind of transactional problems trigger the recovery?(I'd imagine that some transactions are simply rolled back, so something should go really wrong for the recovery to kick in) Thanks in advance for your help. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555450#555450] Start a new discussion in JBoss Messaging at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [jBPM] - Get subprocess id from outside the process

by Al Nadein

Al Nadein [http://community.jboss.org/people/matrixpooh] replied to the discussion "Get subprocess id from outside the process" To view the discussion, visit: http://community.jboss.org/message/555449#555449 -------------------------------------------------------------- final Execution exectution = processInstance.findActiveExecutionIn("subprocess"); String pid = processEngineFactory.getProcessEngine().execute( new Command<String>(){ public String execute(Environment env){ return ((ExecutionImpl)execution).getSubProcessInstance().getId(); } } ); fails with LazyInitializationException - i.e. the same exception as before -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555449#555449] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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[Performance Tuning] - Configuration of Datasource: min-pool-size and max-pool-size

by Emiliano Ricci Aparicio

Emiliano Ricci Aparicio [http://community.jboss.org/people/eraonline] created the discussion "Configuration of Datasource: min-pool-size and max-pool-size" To view the discussion, visit: http://community.jboss.org/message/555446#555446 -------------------------------------------------------------- ¿Which are the recommended values for min-pool-size and max-pool-size to configure an application used normally by 30 users? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555446#555446] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [jBPM] - How to handle failed processes/states due to server crashes?

by Michael Wohlfart

Michael Wohlfart [http://community.jboss.org/people/mwohlf] replied to the discussion "How to handle failed processes/states due to server crashes?" To view the discussion, visit: http://community.jboss.org/message/555442#555442 -------------------------------------------------------------- Hi, > 1. Failed process states due to any server crash. How can I restart the processes from the point where they failed? > The processes are executed within a database transaction until they reach some kind of wait state where they need input (signals) in order to continuethis state is persisted to database, I don't see any reason for restarting a process here. > 2. How will transaction be rolled back once my application is up again? That's the job of the database as far as i understand. > 3. How shall I do Exception Handling? May be Custom node? I know this has been asked in other threads too, but I asking it here also because: a) since I am new to jBPM I am not able to understand it, may be a sample example would do. b) I feel exception handling needs to be taken care in such a application where we are interacting with jms & other external services. That's the job of the user code, you have to deal with your own Exceptions, there is no special Exception Handling besides some obvious stuff like rollback of the ongoing transaction. And then there is some retry code for failed async Job execution and a Retry interceptor for stale hibernate entities. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555442#555442] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [jBPM] - Get subprocess id from outside the process

by Michael Wohlfart

Michael Wohlfart [http://community.jboss.org/people/mwohlf] replied to the discussion "Get subprocess id from outside the process" To view the discussion, visit: http://community.jboss.org/message/555435#555435 -------------------------------------------------------------- use a command: processEngine.execute(new Command() { public Object execute(Environment env) { Execution exe = processInstance.findActiveExecutionIn("subprocess-task"); String subprocessid = ((ExecutionImpl)execution).getSubprocessInstance(); System.out.printlnl("subprocessid is: " + subprocessid); return null; } }); -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555435#555435] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [jBPM] - How to stop jbpm timer?

by Michael Wohlfart

Michael Wohlfart [http://community.jboss.org/people/mwohlf] replied to the discussion "How to stop jbpm timer?" To view the discussion, visit: http://community.jboss.org/message/555432#555432 -------------------------------------------------------------- Hi, simple solution: you can use 5 timers without repeat or you can use a transition to a state without timers after the time for your repeats is up. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555432#555432] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [jBPM] - Get subprocess id from outside the process

by Al Nadein

Al Nadein [http://community.jboss.org/people/matrixpooh] replied to the discussion "Get subprocess id from outside the process" To view the discussion, visit: http://community.jboss.org/message/555423#555423 -------------------------------------------------------------- Thanks for help, HuiSheng, but it still doesn't work: Execution exe = processInstance.findActiveExecutionIn("subprocess-task"); String subprocessid = ((ExecutionImpl)execution).getSubprocessInstance(); -- fails with org.hibernate.LazyInitializationException:could not initialize proxy - no Session -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555423#555423] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [EJB 3.0] - ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy

by jaikiran pai

jaikiran pai [http://community.jboss.org/people/jaikiran] replied to the discussion "ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy" To view the discussion, visit: http://community.jboss.org/message/555422#555422 -------------------------------------------------------------- Please post more details about your application, the exact JBoss AS server, the Java vendor and version and also the entire exception stacktrace. A bit more details about when this happens will also be useful. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555422#555422] Start a new discussion in EJB 3.0 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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Re: [jboss-user] [EJB 3.0] - ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy

by 23054 inf

23054 inf [http://community.jboss.org/people/infped] replied to the discussion "ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy" To view the discussion, visit: http://community.jboss.org/message/555415#555415 -------------------------------------------------------------- Hello Were you able to resolve this issue? I am facing the same problem when deploying an MDB in JBOSS 5. Please help me if you have any leads into this. Best Regards ss -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/555415#555415] Start a new discussion in EJB 3.0 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

13 years, 9 months

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jboss-user August 2010