Zuul/Hystrix: HTTP connection leak in case of timeout

See https://github.com/spring-cloud/spring-cloud-netflix/issues/327 for a complete description of the issue and scenarios to reproduce it.

The bottom line is:

It turns out that Zuul leaks HTTP connections if a service takes longer than the Hystrix execution timeout but less than the ReadTimeout. To summarise:

execTime < hystrixTimeout < readTimeout --> OK (no leak) hystrixTimeout < execTime < readTimeout --> LEAK hystrixTimeout < readTimeout < execTime --> OK (no leak) readTimeout < execTime < hystrixTimeout --> OK (no leak) readTimeout < hystrixTimeout < execTime --> LEAK

The problem has been identified in the RibbonCommand returning an HttpResponse that will never be closed in case of Hystrix timeout. Hence causing connection leaks in the HTTP connection pool.

Although the issue affects SpringCloud’s version of the Zuul server, it seems that com.netflix.zuul.dependency.ribbon.hystrix.RibbonCommand would be affected as well.

[z0mb1ek]

any news?

[DaveBender]

This issue is still marked ‘Open,’ but the comments suggest that a bug fix has been merged nearly a year ago. Is this fixed or is it still hanging out there open?