Setting "dedicated.connection" Causes Error

Hi,
We have OC4J stand-alone 10.1.2.0.2 running on Red Hat Linux.
We currently have an SR (service request #5736059.993) open with Oracle Support.
In that SR, Oracle Support has recommended that we set property "dedicated.connection" to "true". When I do that, I get the following error:
com.evermind.server.rmi.RMIConnectionException: Server shutdown
        at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:50)
        at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:22)
        at __Proxy3.create(Unknown Source)
        at its.fnd.sflto.ejb.EJBSFltData.<init>(EJBSFltData.java:174)
        at its.fnd.sflto.SFltObjectFactory.<init>(SFltObjectFactory.java:206)
        at its.fnd.sflto.SFltObjectFactory.getInstance(SFltObjectFactory.java:184)
        at its.apps.fltload.FltLoadApp.load(FltLoadApp.java:567)
        at its.apps.fltload.FltLoadApp.loadFlights(FltLoadApp.java:512)
        at its.apps.fltload.FltLoadApp.main(FltLoadApp.java:384)Isn't "dedicated.connection" deprecated?
Is this why we are getting the error?
We are running a single instance of OC4J, no clustering.
Thanks,
Avi.
Message was edited by:
Avi Abrami

Hi Avi,
As far as I know, the property dedicated.connection is an OC4J 9.x property.
In the manual
Oracle® Application Server Containers for J2EE Services Guide 10g Release 2 (10.1.2)
you will find in the chapter
2 Java Naming and Directory Interface
the following text about the new property dedicated.rmicontext:
This property replaces the deprecated dedicated.connection setting. When two or more clients in the same process retrieve an InitialContext, OC4J returns a cached context. Thus, each client receives the same InitialContext, which is assigned to the process. Server lookup, which results in server load balancing, happens only if the client retrieves its own InitialContext. If you set dedicated.rmicontext=true, then each client receives its own InitialContext instead of a shared context. When each client has its own InitialContext, then the clients can be load balanced.
The dedicated.rmicontext property defaults to false.
Best,
Manfred

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I am trying to figure out why we are seeing quite a few random connection closed errors in our applications that are using Oracle UCP ver 11.2.0.1.0 connection pooling.
The errors happen at arbitrary jdbc usage source code locations (e.g.: spots that check a connection's auto commit mode, spots that spool through a result set, spots that do yada..) that consume a connection, and are not affiliated with what is being done with the connection (SQL being ran).
The architecture is Tomcat 7, hitting Oracle 10g Enterprise Edition Release 10.2.0.4.0 (RAC). The structure of the code (it's a web app) is such that we have a servlet filter that assigns a http request thread a connection from the pool on an incoming request, then that same connection is closed at the completion of that request's handling. No code uses connections other than code related to handling an http request. And, no threads are spawned off of that request handling thread. And, no code whatsoever (other than the servlet filter's finally block) ever closes a DB connection.
Also, the number of connections in the pool is quite adequate for the usage of the pool. That is, the ceiling is likely never hit. Even if it were---- having an outstanding connection suddenly 'closed out' wouldn't be the proper behavior there.
What are the things that can cause a connection to be 'closed out from under you' ? Meaning, the connection is valid when taken from the pool, but arbitrarily in the middle of usage--- it gets closed.
I am pretty stumped at this point.
Any ideas?
Thanks--

Here are a few sample stacks. Keep in mind that the line of code where the exception actually happens is arbitrary. We see the exception happen at ANY line that is a consumer of a connection. For example... it could happen that it blows up on the 'Nth' iteration while trucking through a result set. Suddenly at say... iteration 143 the connection is suddenly closed out from under the connection's handle.
As far as threads are concerned, each http request that creates a controller servlet instance is assigned it's own connection to use through the handling of that request. That connection instance is assigned as a ThreadLocal instance. Any DB usage that thread has is via that connection. The servlet filter ensures the handle is assigned when the request comes in, then is cleaned up as that request is completely handled in the same filter's finally block (this is a pattern that dozens of web apps we have have been using for going on 10 years now). This is not an ejb app. Straight Tomcat 7 web app using MVC pattern where C is a servlet.
The curious thing here in my mind is that we only have two apps in our collection that are using this new UCP pooling driver (most other are using a tomcat pool). And, only those two are seeing this behavior.
I am not balking at the threads concern--- it's just hard to square that with how we handle threading in such a 'single thread per http request' manner.
And, if it were the case that the pool is handing out the same connection handle to more than one thread because of having multiple entrant threads to the pool accessor method---- it's difficult to buy that it's that common for us to have multiple entrant threads at the same moment in those very short time span it takes for a pool to hand out a connection (given the traffic usage pattern for the app).
Here are the 'known deltas' I am aware of between the two apps that have this behavior, and the couple of dozen we have that do not:
1) these two apps are on Tomcat 7 (most others are Tom 5, Resin, or JBoss)
2) these two apps are using the Ora UCP pool. (most others use Tomcat pool)
~~~~~~~~~ Stack 1 ~~~~~~~~~~~~~~~~~~
01-Dec-2010 12:34:13.479 [ERROR] JDBCExceptionReporter: The connection is closed: The connection is closed
01-Dec-2010 12:34:13.479 [ERROR] PartsGroupingPanel: getDealersInventoryRow() pvid FO03348
org.hibernate.exception.GenericJDBCException: could not inspect JDBC autocommit mode
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.JDBCContext.afterNontransactionalQuery(JDBCContext.java:228)
at org.hibernate.impl.SessionImpl.afterOperation(SessionImpl.java:437)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1134)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.dmotorworks.partinventory.dao.ClientParametersDAO.getAllDealers(ClientParametersDAO.java:20)
~~~~~~~~~ Stack 2 ~~~~~~~~~~~~~~~~~~
01-Dec-2010 11:23:54.889 [ERROR] PartsSearchDAO: getDealerInventoryLineItemsNofN()
java.sql.SQLException: The connection is closed: The connection is closed
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:526)
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:510)
at oracle.ucp.jdbc.proxy.JDBCConnectionProxyFactory.invoke(JDBCConnectionProxyFactory.java:245)
at $Proxy0.prepareStatement(Unknown Source)
at com.dmotorworks.partinventory.dao.PartsSearchDAO.getDealerInventoryLineItemsNofN(PartsSearchDAO.java:246)

Installed Trend Micro Smart Surfing on new MacBook Pro and now it has caused error that won't let computer boot up. How do I get it to a point that I can delete program?

Installed Trend Micro Smart Surfing on new MacBook Pro and now it has caused error that won't let computer boot up. How do I get it to a point that I can delete program?

Try booting up in Safe mode (holding down the Shift key while booting). If the software came with an unistaller, use it to remove alll traces of the software - it's nothing that you need and, as you've experienced, can do more actual hard than good (as is the case with most software of this type). When you're booted in Safe Mode, if you can't run an uninstaller, at least check to make sure that there are no Trend Micro items that are set for automatic log in, at least.
Clinton

Dynamic Calc processor cannot lock more than [100] ESM blocks during the calculation, please increase CalcLockBlock setting and then retry(a small data cache setting could also cause this problem, please check the data cache size setting).

Hi,
Our Environment is Essbase 11.1.2.2 and working on Essbase EAS and Shared Services components.One of our user tried to run the Cal Script of one Application and faced this error.
Dynamic Calc processor cannot lock more than [100] ESM blocks during the calculation, please increase CalcLockBlock setting and then retry(a small data cache setting could also cause this problem, please check the data cache size setting).
I have done some Google and found that we need to add something in Essbase.cfg file like below.
1012704 Dynamic Calc processor cannot lock more than number ESM blocks during the calculation, please increase CalcLockBlock setting and then retry (a small data cache setting could also cause this problem, please check the data cache size setting).
Possible Problems
Analytic Services could not lock enough blocks to perform the calculation.
Possible Solutions
Increase the number of blocks that Analytic Services can allocate for a calculation:
Set the maximum number of blocks that Analytic Services can allocate to at least 500.
If you do not have an $ARBORPATH/bin/essbase.cfg file on the server computer, create one using a text editor.
In the essbase.cfg file on the server computer, set CALCLOCKBLOCKHIGH to 500.
Stop and restart Analytic Server.
Add the SET LOCKBLOCK HIGH command to the beginning of the calculation script.
Set the data cache large enough to hold all the blocks specified in the CALCLOCKBLOCKHIGH setting.
Determine the block size.
Set the data catche size.
Actually in our Server Config file(essbase.cfg) we dont have below data added.
CalcLockBlockHigh 2000
CalcLockBlockDefault 200
CalcLockBlocklow 50
So my doubt is if we edit the Essbase.cfg file and add the above settings and restart the services will it work? and if so why should we change the Server config file if the problem is with one application Cal Script. Please guide me how to proceed.
Regards,
Naveen

Your calculation needs to hold more blocks in memory than your current set up allows.
From the docs (quoting so I don't have to write it, not to be a smarta***:
CALCLOCKBLOCK specifies the number of blocks that can be fixed at each level of the SET LOCKBLOCK HIGH | DEFAULT | LOW calculation script command.
When a block is calculated, Essbase fixes (gets addressability to) the block along with the blocks containing its children. Essbase calculates the block and then releases it along with the blocks containing its children. By default, Essbase allows up to 100 blocks to be fixed concurrently when calculating a block. This is sufficient for most database calculations. However, you may want to set a number higher than 100 if you are consolidating very large numbers of children in a formula calculation. This ensures that Essbase can fix all the required blocks when calculating a data block and that performance will not be impaired.
Example
If the essbase.cfg file contains the following settings:
CALCLOCKBLOCKHIGH 500 CALCLOCKBLOCKDEFAULT 200 CALCLOCKBLOCKLOW 50
then you can use the following SET LOCKBLOCK setting commands in a calculation script:
SET LOCKBLOCK HIGH;
means that Essbase can fix up to 500 data blocks when calculating one block.
Support doc is saying to change your config file so those settings can be made available for any calc script to use.
On a side note, if this was working previously and now isn't then it is worth investigating if this is simply due to standard growth or a recent change that has made an unexpected significant impact.

Setting "dedicated.connection" Causes Error

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