Christopher L. Shannon created AMQ-6505:
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Summary: Auto transports can lead to high cpu usage and failed
connections under high load
Key: AMQ-6505
URL: https://issues.apache.org/jira/browse/AMQ-6505
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.14.1
Reporter: Christopher L. Shannon
Assignee: Christopher L. Shannon
There's an issue with the auto transports that can cause failed connections and
very high cpu usage when there is a high number of concurrent connections
attempted at the same time. I noticed this primarily under load testing the
auto+nio+ssl transport. After some debugging, it turns out the issue is the
ByteBuffer that is used to capture the initial bytes for protocol detection.
The buffer should be local per thread and not shared but by mistake it was made
a class level variable so under high load and contention the buffer can be
manipulated by more than one thread causing failures and high cpu load
(especially under NIO)
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