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fix: prevent sandbox halt after resume by fixing HTTP/2 HOL blocking and adding timeouts

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Disable HTTP/2 on both host agent server and CP→agent transport — multiplexing
caused head-of-line blocking when a slow sandbox RPC stalled the shared connection.
Add ResponseHeaderTimeout to envd HTTP clients. Merge SetDefaults into Resume's
PostInit call to eliminate an extra round-trip that could hang on a stale connection.
This commit is contained in:
Rafeed M. Bhuiyan
2026-05-02 13:48:51 +06:00
parent 7ef9a64613
commit bb582deefa
5 changed files with 30 additions and 16 deletions
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10
internal/envdclient/dialer.go
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@ -23,8 +23,9 @@ func newHTTPClient() *http.Client {
return &http.Client{
Timeout: 2 * time.Minute,
Transport: &http.Transport{
MaxIdleConnsPerHost: 10,
IdleConnTimeout: 90 * time.Second,
MaxIdleConnsPerHost: 10,
IdleConnTimeout: 90 * time.Second,
ResponseHeaderTimeout: 30 * time.Second,
DialContext: (&net.Dialer{
Timeout: 10 * time.Second,
KeepAlive: 30 * time.Second,
@ -38,8 +39,9 @@ func newHTTPClient() *http.Client {
func newStreamingHTTPClient() *http.Client {
return &http.Client{
Transport: &http.Transport{
MaxIdleConnsPerHost: 10,
IdleConnTimeout: 90 * time.Second,
MaxIdleConnsPerHost: 10,
IdleConnTimeout: 90 * time.Second,
ResponseHeaderTimeout: 30 * time.Second,
DialContext: (&net.Dialer{
Timeout: 10 * time.Second,
KeepAlive: 30 * time.Second,