[TS-3413] High CPU utilization when processing Http/2 traffic

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.3.0
• Component/s: HTTP/2, Performance
• Assignee: Susan Hinrichs
• Reporter: Susan Hinrichs
• Created: 26/Feb/15 14:04
• Updated: 13/May/15 20:36
• Resolved: 02/Mar/15 14:32

Description

Running ATS in forward transparent mode with Http/2 support enabled. After a few page views, ATS gets into a state where it is consistently using more than 100% CPU. I think what is happening is that the origin server is closing the connection (we get a TS_EVENT_VCONN_EOS in FetchSM). FetchSM sends a BODY_DONE to Http2ClientSession but the http_vc (origin socket?) is never closed, so with each poll interval the EOS is reported again and again.

Issue Links

• relates to: TS-3405 Memory use after free in HTTP/2