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jbertram ef5a9809f2 ARTEMIS-256 orchestrate failback deterministically 
The failback process needs to be deterministic rather than relying on various
incarnations of Thread.sleep() at crucial points. Important aspects of this
change include:

1) Make the initial replication synchronization process block at the very
last step and wait for a response from the replica to ensure the replica has
as the necessary data. This is a critical piece of knowledge during the
failback process because it allows the soon-to-become-backup server to know
for sure when it can shut itself down and allow the soon-to-become-live
server to take over. Also, introduce a new configuration element called
"initial-replication-sync-timeout" to conrol how long this blocking will occur.

2) Set the state of the server as 'LIVE' only after the server is fully
started. This is necessary because once the soon-to-be-backup server shuts
down it needs to know that the soon-to-be-live server has started fully before
it restarts itself as the new backup. If the soon-to-be-backup server restarts
before the soon-to-be-live is fully started then it won't actually become a
backup server but instead will become a live server which will break the
failback process.

3) Wait to receive the announcement of a backup server before failing-back.
 		2015-10-20 14:55:31 -04:00
..
diagrams ACTIVEMQ6-9 - port to markdown 2014-12-08 13:23:24 +00:00
hacking-guide/en adding note about IBM JDK 2015-09-29 15:47:31 -04:00
user-manual/en ARTEMIS-256 orchestrate failback deterministically 2015-10-20 14:55:31 -04:00
README.html Release notes 1.1.0 2015-09-03 22:57:44 -04:00
README.md Release notes 1.1.0 2015-09-03 22:57:44 -04:00

README.md

Release Notes - Apache ActiveMQ Artemis 1.1.0

A complete list for JIRAs for the 1.1.0 release can be found at the Apache ActiveMQ Artemis project JIRA

Overall Apache ActiveMQ Artemis 1.1.0 has several improvements and it's a nice polish on top of Apache ActiveMQ Artemis 1.0.0, things like better examples, better OpenWire support and the first release of MQTT.

We would like to highlight the following accomplishments on this release:

  • [ARTEMIS-154] This is our first implementation of the MQTT support.

  • ARTEMIS-178 The examples are now using the CLI to create and start servers reflecting real cases used in production. The documentation about the examples has been updated. Please refer to the documentation for more information about this.

  • [ARTEMIS-116] The CLI has been improved. There are new tools to compact the journal and we did a lot of polish around the CLI.

  • Improvements on OpenWire We fixed several issues around OpenWire

Where we are still improving.

1.1.0 has improved a lot, and these are the areas we are still working on:

  • This is the first release with MQTT. We would like to hear from you if you have any issues around MQTT as we are continuously improving the MQTT support

  • Short list of what need to be implemented on OpenWire for future releases:

    • Reconnection
    • Better Flow Control on producers
    • Compressed messages
    • Optimized ACKs
    • Streamlet support

Release Notes - Apache ActiveMQ Artemis 1.0.0

The Apache ActiveMQ Artemis 1.0.0 release notes can be found in the Apache ActiveMQ Artemis project JIRA. For more info on what this release has to offer please refer to the quick start guide or the user manual. Enjoy!!