Rwservlet / oracle database connection reuse by multiple reports

Dear all,
I have deployed multiple web reports on Oracle Application Server 10g.
All my reports connect to a single Oracle database.
My question is:
How to configure rwservlet to maitain a kind of connection pool(cached set of connections for reuse) to the database?
I want to avoid establishing a new database connection each time a user runs a report.
Thanks.

you can create a CGICMD file and send the requests to cgicmd through the servlet.

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Database connection lost during running report

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Please, close this thread and open a new one in the correct forum.
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Thank you

Well i've never used oracle or their drivers before but i'm presuming that you'd go to oracle.com or something and look for downloads. Otherwise you could goodle for Oracle JDBC drivers. Then just follow the instructions.
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Wes

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Hi,
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[email protected]
Jacky

Jacky,
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Hope this helps.
Good luck.
Xuran
"Jacky Yan" <[email protected]> wrote in message
news:9m0tmp$[email protected]..
Hi,
Does anyone who hows to config the oracle database connection pool in IAS?
Thanks so much!!!
[email protected]
Jacky

Crystal Report Viewer Not Releasing Oracle Database Connections

I have a very simple vb.net 3.5 web application that uses the Crystal Report viewer 2008 to open a report. My requirements are as follows:
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2. All reports contain parameter fields
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Hello, Timothy;
By default, having the report in session will hold it open for 20 minutes.
If you create the report as a ReportDocument object you can take it out of session and release it more efficiently. That will release the connection.
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Dear All,
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Hi,
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Hi,
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Edited by: Dino2dy on Nov 24, 2011 12:53 AM

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Dear SDN,
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I hvae installed the Oracle database and client. I have checked and stated the services, updated the host file, started the database with SQL editor, checked the Oracle Enterprise Manager, all looks fine.
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Cannot connect to jaiswal
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SQL Server does not exist or access denied.
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Best Regards
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Dear Vincent
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Best Regards
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Database connection error when running report from web application

Hi all,
When I open a report in Reports Builder , and enter the database connection parameters, everything works fine. When I run my web application from JDeveloper (9.0.5.1), and I tried to run a report, I get this error:
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I have ran tnsping, and it works fine. My tnsnames.ora file looks like this :
GPGWL =
(DESCRIPTION =
(ADDRESS_LIST =
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(CONNECT_DATA =
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)

Please ask this question in Jdeveloper forum.

What is the logic behind the oracle database connections....

Hi,
We have crontab alerts are enabled for the oracle database client connection.
For Production databases the alerts are coming continuously until it gets connected.
For QA databases it will throw the message that the oracle client connection fails and again it will prompt whenever it gets connected.
Please let me know the logic behind these scnerions.
Pavan..
Edited by: dm_ptldba on Feb 14, 2012 6:45 AM

Hi,
Thanks for the update, Sorry the question was not clear. let me put it in a clear way.
Following is our crontab which alerts us if any database/listener goes down. But it alerts us only once for one successful/unsuccessful connection. For Eg: If the crontab not able to connect to the database for once then it throws an alert only once and waits for a successful connection.
I would like to change the logic in this crontab in such a way that, it should keep on alerting us for all the unsuccessful connections and once or twice for successful connection.
. /home/oracle/.bash_profile
. /opt/oracle/cron/cron_email
sidfile=/home/oracle/scripts/db-list.txt
dboutfile=/home/oracle/scripts/dboutfile.tmp
echo $ORACLE_HOME
TNS_DIR=$ORACLE_HOME/network/admin
ORA_BIN=$ORACLE_HOME/bin
cat $sidfile | while read SIDNAME
do
$ORA_BIN/sqlplus -s system/******@$SIDNAME 2> /dev/null >> $dboutfile <<EOF
@/home/oracle/scripts/db_up.sql
EOF
if [ $? -eq 0 ]
then
STATUS=1
if [ -f /home/oracle/scripts/${SIDNAME}-down.txt ]
then
/bin/mail -s "Alert :Oracle database instance \"${SIDNAME}\" is up & connected..." [email protected] </dev/null
rm -rf /home/oracle/scripts/${SIDNAME}-down.txt
fi
else
if [ -f /home/oracle/scripts/${SIDNAME}-down.txt ]; then
echo "";
else
touch /home/oracle/scripts/${SIDNAME}-down.txt
echo ${SIDNAME} "not Connected ..."
/bin/mail -s "Alert :Oracle database instance \"${SIDNAME}\" is down......" [email protected] </dev/null
fi
fi
done
Thank you.
PTLDBA

Getting TXN timeout exception when getting an XA Oracle Database Connection

Running WLS 8.1 sp5 on Linux in a Cluster (4 servers)
          Using Oracle 10.2.0.2.0 Thin XA driver
          Running Oracle Datbase 9.2.06 or 9.2.07; I think
          I am getting the SQLException: Unexpected exception while enlisting XAConnection java.sql.SQLException: Transaction rolled back: Transaction timed out after 31 seconds
          It fails at: weblogic.jdbc.jta.DataSource.enlist(Lweblogic/transaction/Transaction;)V(Optimized Method). The exception occurs on all 4 WLS instances at the same time.
          Stack trace at bottom. This problem seems to occur on and off at about the same time. We have not been able to see other jobs that would affect it during this time.
          - Max Pool Size = 25
          - Current and High Connections = 5
          - Num Unavaiable = 0
          - Failure to Reconnect = 0
          - Connection Delay ranges from 57 to 126 milliseconds
          The problem occurs within an MDB. The MDB gets a msg from the JMS queue, fires off an SMTP msg, and tries to update the database and fails due to the timeout on enlisting in the XA transaction.
          Any thoughts on what to look for? Read the info at http://edocs.bea.com/wls/docs81/faq/JTA.html#738205. Is it talking to the Oracle database to enlist. Since occuring on all 4, there is a central place it's failing and I guess the database is a start.
          Thanks. Later...
          - Wayne
          Wed Jan 10 08:30:13 EST 2007: EMS: Exception: EMSSenderDao.mdbChangeMessageQueueStatus() : java.lang.Exception: getMdbDBConnection() : java.sql.SQLException: Unexpected exception while enlisting XAConnection java.sql.SQLException: Transaction rolled back: Transaction timed out after 31 seconds
          BEA1-6A0F2B6B5AA26811FBB9
          at weblogic.jdbc.jta.DataSource.enlist(Lweblogic/transaction/Transaction;)V(Optimized Method)
          at weblogic.jdbc.jta.DataSource.getConnection()Ljava/sql/Connection;(Optimized Method)
          at weblogic.jdbc.jta.DataSource.connect(Ljava/lang/String;Ljava/util/Properties;)Ljava/sql/Connection;(Optimized Method)
          at weblogic.jdbc.common.internal.RmiDataSource.getConnection()Ljava/sql/Connection;(Optimized Method)
          at com.foo_company.ems.dao.EMSSenderDao.mdbChangeMessageQueueStatus(ILjava/lang/String;I)I(Optimized Method)
          at com.foo_company.ems.ejb.emsmessageconsumer.EMSMessageConsumerBean.onMessage(Ljavax/jms/Message;)V(Optimized Method)
          at weblogic.ejb20.internal.MDListener.execute(Lweblogic/kernel/ExecuteThread;)V(Optimized Method)
          at weblogic.ejb20.internal.MDListener.transactionalOnMessage(Ljavax/jms/Message;)V(Optimized Method)
          at weblogic.ejb20.internal.MDListener.onMessage(Ljavax/jms/Message;)V(Optimized Method)
          at weblogic.jms.client.JMSSession.onMessage(Ljavax/jms/MessageListener;Lweblogic/jms/common/MessageImpl;)V(Optimized Method)
          at weblogic.jms.client.JMSSession.execute(Lweblogic/kernel/ExecuteThread;)V(Optimized Method)
          at weblogic.kernel.ExecuteThread.execute(Lweblogic/kernel/ExecuteRequest;)V(Optimized Method)
          at weblogic.kernel.ExecuteThread.run()V(ExecuteThread.java:183)
          at java.lang.Thread.startThreadFromVM(Ljava/lang/Thread;)V(Unknown Source)

Wayne Lau wrote:
          > Running WLS 8.1 sp5 on Linux in a Cluster (4 servers)
          > Using Oracle 10.2.0.2.0 Thin XA driver
          > Running Oracle Datbase 9.2.06 or 9.2.07; I think
          >
          > I am getting the SQLException: Unexpected exception while enlisting XAConnection java.sql.SQLException: Transaction rolled back: Transaction timed out after 31 seconds
          >
          > It fails at: weblogic.jdbc.jta.DataSource.enlist(Lweblogic/transaction/Transaction;)V(Optimized Method). The exception occurs on all 4 WLS instances at the same time.
          >
          > Stack trace at bottom. This problem seems to occur on and off at about the same time. We have not been able to see other jobs that would affect it during this time.
          > - Max Pool Size = 25
          > - Current and High Connections = 5
          > - Num Unavaiable = 0
          > - Failure to Reconnect = 0
          > - Connection Delay ranges from 57 to 126 milliseconds
          >
          > The problem occurs within an MDB. The MDB gets a msg from the JMS queue, fires off an SMTP msg, and tries to update the database and fails due to the timeout on enlisting in the XA transaction.
          >
          > Any thoughts on what to look for? Read the info at http://edocs.bea.com/wls/docs81/faq/JTA.html#738205. Is it talking to the Oracle database to enlist. Since occuring on all 4, there is a central place it's failing and I guess the database is a start.
          >
          > Thanks. Later...
          >
          >
          > - Wayne
          Hi. At that moment the issue, whatever it is, has already happened.
          Something in the processing of the transaction to this point has
          already taken longer than you have specified that a transaction
          must complete in. Ideally we'd like to see the JTA/JDBC/2PC debug
          logging turned on, so we have lines with timestamps for every
          step in your tx.
          Joe
          > Wed Jan 10 08:30:13 EST 2007: EMS: Exception: EMSSenderDao.mdbChangeMessageQueueStatus() : java.lang.Exception: getMdbDBConnection() : java.sql.SQLException: Unexpected exception while enlisting XAConnection java.sql.SQLException: Transaction rolled back: Transaction timed out after 31 seconds
          > BEA1-6A0F2B6B5AA26811FBB9
          > at weblogic.jdbc.jta.DataSource.enlist(Lweblogic/transaction/Transaction;)V(Optimized Method)
          > at weblogic.jdbc.jta.DataSource.getConnection()Ljava/sql/Connection;(Optimized Method)
          > at weblogic.jdbc.jta.DataSource.connect(Ljava/lang/String;Ljava/util/Properties;)Ljava/sql/Connection;(Optimized Method)
          > at weblogic.jdbc.common.internal.RmiDataSource.getConnection()Ljava/sql/Connection;(Optimized Method)
          > at com.foo_company.ems.dao.EMSSenderDao.mdbChangeMessageQueueStatus(ILjava/lang/String;I)I(Optimized Method)
          > at com.foo_company.ems.ejb.emsmessageconsumer.EMSMessageConsumerBean.onMessage(Ljavax/jms/Message;)V(Optimized Method)
          > at weblogic.ejb20.internal.MDListener.execute(Lweblogic/kernel/ExecuteThread;)V(Optimized Method)
          > at weblogic.ejb20.internal.MDListener.transactionalOnMessage(Ljavax/jms/Message;)V(Optimized Method)
          > at weblogic.ejb20.internal.MDListener.onMessage(Ljavax/jms/Message;)V(Optimized Method)
          > at weblogic.jms.client.JMSSession.onMessage(Ljavax/jms/MessageListener;Lweblogic/jms/common/MessageImpl;)V(Optimized Method)
          > at weblogic.jms.client.JMSSession.execute(Lweblogic/kernel/ExecuteThread;)V(Optimized Method)
          > at weblogic.kernel.ExecuteThread.execute(Lweblogic/kernel/ExecuteRequest;)V(Optimized Method)
          > at weblogic.kernel.ExecuteThread.run()V(ExecuteThread.java:183)
          > at java.lang.Thread.startThreadFromVM(Ljava/lang/Thread;)V(Unknown Source)

Database connection change in crystal reports 9

Post Author: thanksforhelp
CA Forum: Data Connectivity and SQL
Hi,
The report have to modified so I moved from prod to dev and changed the Database connection in set database location. they have the same table name and structure, but different database name, on the verify sql, I still see the prod database name and data is pulled from prod and not dev.
Please help in fixing the issue.
thanks in advance.

Hi,
Yes, I am using the MDX driver.
Is there any pre-requisites of importing certain ABAP transports into SAP Server since I haven't done any? Please recommend.
Thanks,
Amogh

Oracle Database Connection ISSUE

Folks,
I Installed Oracle 8.1.7 database on a RH AS Linux server. Installation is smooth. I am able to start the server and listerner without any errors. I am able to connect through SQL Plus and JDBC Clients. After sometime(10-12 mins) something happens on the server and I am NOT able to connect to the server through JDBC client. But still I am able to connect through SQL Plus from remote machines.
Does this ring any bells to you guys ? Let me know.
thx.
Rajesh.

Dear Vincent
I am using the Oracle as database. When I extract the part-1-5 folder for Oracle database and started the run the sapinst under extracted folder > data units > _MSS.
Best Regards
Arun Jaiswal

Rwservlet / oracle database connection reuse by multiple reports

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