Sending data will block the working thread, causing the gateway to crash

[chgang]

We have found that a netty thread occasionally sends data for 5 seconds (usually only a few milliseconds), causing the thread to be occupied and unable to process other requests. If all threads (such as 6 threads) are occupied, the gateway will crash.

The following is the debug log information of the reactor net source code. During this 5-second period, the reactor-http-epoll-3 thread has been blocking and not processing any other requests, while the other 5 worker threads are processing requests.

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2024-12-18 19:48:40.857  DEBUG [reactor-http-epoll-3] reactor.netty.resources.DefaultPooledConnectionProvider.debug:259 -[d3704e8f-64, L:/10.71.51.11:14010 - R:/10.70.1.11:443] onStateChange(GET{uri=/v1/around, connection=PooledConnection{channel=[id: 0xd3704e8f, L:/10.71.51.11:14010 - R:/10.70.1.11:443]}}, [request_sent])

2024-12-18 19:48:45.872  DEBUG [reactor-http-epoll-3] reactor.netty.resources.DefaultPooledConnectionProvider.debug:259 -[d3704e8f-64, L:/10.71.51.11:14010 - R:/10.70.1.11:443] onStateChange(GET{uri=/v1/around, connection=PooledConnection{channel=[id: 0xd3704e8f, L:/10.71.51.11:14010 - R:/10.70.1.11:443]}}, [response_received])

[chgang]

spring cloud gateway 3.1.9

[spencergibb]

That version is out of open source support. Please upgrade to spring cloud 2023.0.x or 2024.0.0 and let us know if the issue persists. https://spring.io/projects/spring-cloud-gateway#support

[chgang]

If version 3.1.9 exceeds open source, which version from spring-cloud-gateway3. x.x should I use

[spencergibb]

4.1.x and 4.2.x are the only open source supported versions

[spring-cloud-issues]

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