Category: Middleware Optimization
Blog
Apache ActiveMQ Zero-Downtime Maintenance: The Complete Procedures Guide
The broker is processing 8,000 messages per second. There are 340 active client connections. A configuration change is needed: a memoryUsage limit increase to prevent an approaching producer flow control event. The question is not whether to make the change. The question is how to make it without dropping messages, disconnecting clients, or triggering a cascade of client reconnect storms that themselves cause the resource pressure you are trying to resolve.
Blog
Multi-Datacenter Active ActiveMQ® Deployment: Network of Brokers & AMQP
A single-datacenter ActiveMQ deployment, even with full HA, has a fundamental limitation: all message processing is bound to one physical location. Geographic distribution, whether driven by latency requirements (consumers closer to producers), regulatory requirements (data residency), or business continuity requirements (surviving a full site outage), requires a multi-data center deployment.
Blog
ActiveMQ Upgrade & Patching Strategy: The Expert Guide
On October 27, 2023, the Apache Software Foundation published CVE-2023-46604, a CVSS 10.0 remote code execution vulnerability in Apache ActiveMQ® that allowed unauthenticated attackers to execute arbitrary code by exploiting the OpenWire protocol's ClassInfo deserialization.
Blog
ActiveMQ Performance Benchmarks: A Complete Methodology Guide
Most ActiveMQ performance benchmarks are wrong, not slightly off, but fundamentally invalid for capacity planning. Performance benchmarking done incorrectly is worse than not benchmarking at all. A number that looks like a throughput measurement but was collected without JVM warmup, without latency percentiles, with the load generator co-located on the broker host, and while producer
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ActiveMQ Log Analysis & Diagnostics: The Expert Guide
Senior engineers who are fast at diagnosing ActiveMQ incidents share one trait: they know exactly what they are looking for in the broker log before they open it. They know the PFC signature, the OOM warning pattern, the journal recovery sequence, and the connection drop format. For them, the log is not text to search through, it is a structured operational record that maps each entry to a specific broker state.
Blog
ActiveMQ Backup and Disaster Recovery: Complete DR Guide
A message broker's backup and disaster recovery plan is the last line of defense against scenarios that HA cannot address: a full datacenter outage, catastrophic hardware failure that destroys both primary and secondary nodes, accidental message deletion, or KahaDB corruption that prevents the broker from starting.