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https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.0.0/com.ibm.mq.pro.doc/q023610_.htm?origURL=SSFKSJ_9.0.0/com.ibm.mq.sce.doc/q023610_.htm
Nov 06, 2019 · If no xa_open call is made on the same thread, before the MQCONN call, then the IBM MQ queue manager connection will not be associated with an XA context. For more information, see MQCTL. The xa_info structure passed on any xa_open call by the sync point coordinator includes the name of an IBM MQ queue manager.
https://stackoverflow.com/questions/29396718/minimum-version-of-ibm-websphere-mq-supporting-xa-transactions
It's not clear if you are asking just about an XA MQ client or a queue manager that can act as an XA resource manager. In either case, any MQ version older than v7 is no longer supported by IBM so at a minimum you should be using MQ v7.0.1, preferably one even more recent because that version has end of support September this year.
https://www.easysoft.com/applications/websphere_mq/odbc_oracle_driver_xa_support.html
How to use the Easysoft ODBC-Oracle Driver to access an Oracle database as an XA resource from WebSphere MQ. This tutorial includes C source code for a sample WebSphere MQ application. The code example shows the point at which an ODBC connection needs to be created and closed to participate in a distributed WebSphere transaction.
https://docs.oracle.com/en/middleware/service-bus/12.2.1.3/develop/using-mq-transport.html
When the MQ library is version 8 or version 9 with XA support, ECIDContext is only added to RF2 messages if this option is selected and DMS is enabled. For information about how the MQ transport handles RFH2 headers, see About RFH2 Headers .
http://www-01.ibm.com/support/docview.wss?uid=swg1IT16767
IT16767: MQ client app running under control of XA TM calls MQDISC and MQ later rejects XA calls on the same thread Subscribe to this APAR By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available.
http://activemq.apache.org/should-i-use-xa.html
ActiveMQ does not currently support XA Transaction suspend / resume semantics. An alternative to XA. So a good optimisation is to use regular JMS transactions - with no XA - and just perform some duplicate message detection in your code to check you have not already processed the message.
http://www-01.ibm.com/support/docview.wss?uid=swg1PI49236
To register the work as part of an XA transaction, the transaction manager makes XA_START and XA_END calls on the application's connection to MQ. When the application requests that the transaction manager completes the transaction, the transaction manager may decide to use a different MQ connection to make the XA_PREPARE call.
http://usuaris.tinet.cat/sag/mq_trmgr.htm
The terms transaction and unit of work are often used interchangeably. Units of work that include MQ actions and actions on other resources are called global units of work. The transaction that controls a global unit of work is coordinated by a transaction manager, which must be able to communicate with all participants within that unit of work.
https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_7.5.0/com.ibm.mq.pro.doc/q003570_.htm
One of these interfaces is the XA Interface, which is a standard interface supported by a number of transaction managers and resource managers. The XA Interface is published by The Open Group in Distributed Transaction Processing: The XA Specification.
https://stackoverflow.com/questions/10416856/use-websphere-mq-as-xa-transaction-coordinator
I am trying to use Websphere MQ (without WAS) as the XA transaction coordinator for my java application between MQ and Oracle 11g. Is it possible? Is it a good practice? I have installed the MQ V7.0.1 server on my windows (64bit win7) and config the XA resource manager properly.
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