JBOSS Informix XA Data Source
Hi
I am using Informix database for my transaction processing and we have created
four databases 1. JMS, 2. tracking 3. lookups or more or less static tables and
these are from same instances and stay on the same server. Another database is
used to lookup and authentication purpose. Acodingly,
Our application has following flow. MDBean reads the message from Queue and invoke a session bean for busisness
logic and now the businesss logic is in the form of JAVA CLASSES and we are using JNDI to get the connection
and update the database information.
I have created four xml-files like.
1.
informix-destdb-xa-ds.xml( happenes updates through this connection)
2. informix-trackdb-xa-ds.xml( happenes updates through this connection
3. informix-jms-ds.xml (not xa datasoruce)
4. informix-fscdb-ds.xml ( for lookup purpose)
Now my first xa data source XML
informix-destdb-xa-ds.xml and informix-trackdb-xa-ds.xml are,
<?xml version="1.0" encoding="UTF-8"?> <!-- ===================================================================== --> <!-- --> <!-- JBoss Server Configuration --> <!-- --> <!-- ===================================================================== --> <!-- $Id: informix-xa-ds.xml,v 1.4.2.2 2004/12/01 11:44:40 schrouf Exp $ --> <datasources> <xa-datasource> <jndi-name>InformixDestDB</jndi-name> <xa-datasource-class>com.informix.jdbcx.IfxXADataSource</xa-datasource-class> <!-- Not supported by latter drivers <xa-datasource-property name="IfxWAITTIME">10</xa-datasource-property> --> <xa-datasource-property name="Description">Something Descriptive</xa-datasource-property> <xa-datasource-property name="IfxIFXHOST">hostname</xa-datasource-property> <xa-datasource-property name="PortNumber">1551</xa-datasource-property> <xa-datasource-property name="DatabaseName">destdb</xa-datasource-property> <xa-datasource-property name="ServerName">ondevdb</xa-datasource-property> <user-name>username</user-name> <password>password</password> <no-tx-seperate-pools/> <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.InformixExceptionSorter</exception-sorter-class-name> <prepared-statement-cache-size>50</prepared-statement-cache-size> <min-pool-size>20</min-pool-size> <max-pool-size>50</max-pool-size> <idle-timeout-minutes>15</idle-timeout-minutes> <track-statements>false</track-statements> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> <metadata> <type-mapping>InformixDB</type-mapping> </metadata> </xa-datasource> </datasources>
where as
informix-jms-ds.xml
informix-fscdb-ds.xml
are
<?xml version="1.0" encoding="UTF-8"?>
<!-- ===================================================================== --> <!-- --> <!-- JBoss Server Configuration --> <!-- --> <!-- ===================================================================== --> <!-- $Id: informix-ds.xml,v 1.2 2003/09/05 16:39:28 patriot1burke Exp $ --> <!-- <connection-url>jdbc:informix-sqli://myhost.mydomain.com:1557/mydb:INFORMIXSERVER=myserver</connection-url> --> <datasources> <local-tx-datasource> <jndi-name>InformixDB</jndi-name> <connection-url>jdbc:informix-sqli://hostname:15512/fscdb:informixserver=instanceName</connection-url> <driver-class>com.informix.jdbc.IfxDriver</driver-class> <user-name></user-name> <password></password> <prepared-statement-cache-size>50</prepared-statement-cache-size> <min-pool-size>20</min-pool-size> <max-pool-size>50</max-pool-size> <idle-timeout-minutes>15</idle-timeout-minutes> <track-statements>false</track-statements> <!-- sql to call when connection is created <new-connection-sql>some arbitrary sql</new-connection-sql> --> <!-- sql to call on an existing pooled connection when it is obtained from pool <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql> --> <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) --> <metadata> <type-mapping>InformixDB</type-mapping> </metadata> </local-tx-datasource> </datasources>
Now I have two problems :
I have three queues where in MDBeans are reading the queues and using stateless
session bean to do business processing.
case 1. If I use non XA connection or data source it is working fine for a single transaction or
document porcessing. It mean if I post a message to first queue the MDBean takes the message and
process the message and send to the next queue and so on.
Problem : if I post 10 messages to Queue and up the Beans the I am getting the following message.
java.sql.SQLException: Could not position within a table (informix.track_trans).
2005-10-14 16:11:26,166 INFO [STDOUT] at com.informix.jdbc.IfxSqli.a(IfxSqli.java:3204)
case 2. Then I thought If I use XA datasoruce I may resolve this issue then I have used two XA connections
for modifications or updating the database and two non XA for lookups and it is behaving different way
if I use
<track-connection-by-tx>true</track-connection-by-tx>then it
is locking and giving time out message for second XA connection and JBOSS HANGS
and if remove the property then for one message it is rollbacking many times and generating 12 messages in the queue.
case 3. If I test the same on JBOSS 4.02 with XA then it is behaving as case 1.
Do any one has any idea about XA with JBOSS.
Thanks for any help.
