ef5a9809f2
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. |
||
|---|---|---|
| .. | ||
| diagrams | ||
| images | ||
| README.md | ||
| SUMMARY.md | ||
| aerogear-integration.md | ||
| architecture.md | ||
| book.json | ||
| client-classpath.md | ||
| client-reconnection.md | ||
| clusters.md | ||
| configuration-index.md | ||
| configuring-transports.md | ||
| connection-ttl.md | ||
| core-bridges.md | ||
| diverts.md | ||
| duplicate-detection.md | ||
| embedding-activemq.md | ||
| examples.md | ||
| filter-expressions.md | ||
| flow-control.md | ||
| graceful-shutdown.md | ||
| ha.md | ||
| intercepting-operations.md | ||
| jms-bridge.md | ||
| jms-core-mapping.md | ||
| large-messages.md | ||
| last-value-queues.md | ||
| libaio.md | ||
| logging.md | ||
| management.md | ||
| maven-plugin.md | ||
| message-expiry.md | ||
| message-grouping.md | ||
| messaging-concepts.md | ||
| notice.md | ||
| paging.md | ||
| perf-tuning.md | ||
| persistence.md | ||
| pre-acknowledge.md | ||
| preface.md | ||
| project-info.md | ||
| protocols-interoperability.md | ||
| queue-attributes.md | ||
| resource-limits.md | ||
| rest.md | ||
| scheduled-messages.md | ||
| security.md | ||
| send-guarantees.md | ||
| slow-consumers.md | ||
| spring-integration.md | ||
| syntax.md | ||
| thread-pooling.md | ||
| tools.md | ||
| transaction-config.md | ||
| undelivered-messages.md | ||
| using-core.md | ||
| using-jms.md | ||
| using-server.md | ||
| vertx-integration.md | ||
| wildcard-routing.md | ||
| wildcard-syntax.md | ||
README.md
Apache ActiveMQ Artemis User Manual
The User manual is an in depth manual on all aspects of Apache ActiveMQ Artemis