net/http: TestHTTP2UpgradeClosesConnection failure on solaris-amd64-oraclerel builder

[bcmills]

2020-09-25T01:47:40-fa04d48/solaris-amd64-oraclerel

--- FAIL: TestHTTP2UpgradeClosesConnection (17.51s)
    serve_test.go:1096: body not closed after 5s
FAIL
FAIL	net/http	20.671s

Could just be a slow builder, although 5 seconds seems like a long time.

CC @bradfitz @neild

[networkimprov]

cc @fraenkel

[fraenkel]

A bit difficult to figure out what went wrong but given that sending a request and receiving a response took 12s, I would say something was wrong before we hit this timeout.

[bcmills]

greplogs --dashboard --md -l -e 'FAIL: TestHTTP2UpgradeClosesConnection .*(?:\n .*)*body not closed after' --since=2021-01-01

[no results]

Closing as “possibly fixed”.