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pkg/aflow: retry LLM requests on transient errors #6622

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Merged
dvyukov merged 1 commit into from
Jan 19, 2026
Merged

pkg/aflow: retry LLM requests on transient errors #6622

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21 changes: 20 additions & 1 deletion pkg/aflow/llm_agent.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,12 @@
package aflow

import (
"errors"
"fmt"
"maps"
"net/http"
"reflect"
"time"

"github.com/google/syzkaller/pkg/aflow/trajectory"
"google.golang.org/genai"
Expand Down Expand Up @@ -98,7 +101,7 @@ func (a *LLMAgent) chat(ctx *Context, cfg *genai.GenerateContentConfig, tools ma
if err := ctx.startSpan(reqSpan); err != nil {
return "", nil, err
}
resp, err := ctx.generateContent(cfg, req)
resp, err := a.generateContent(ctx, cfg, req)
if err != nil {
return "", nil, ctx.finishSpan(reqSpan, err)
}
Expand Down Expand Up @@ -216,6 +219,22 @@ func (a *LLMAgent) parseResponse(resp *genai.GenerateContentResponse) (
return
}

func (a *LLMAgent) generateContent(ctx *Context, cfg *genai.GenerateContentConfig,
req []*genai.Content) (*genai.GenerateContentResponse, error) {
backoff := time.Second
for try := 0; ; try++ {
resp, err := ctx.generateContent(cfg, req)
var apiErr genai.APIError
if err != nil && try < 100 && errors.As(err, &apiErr) &&
apiErr.Code == http.StatusServiceUnavailable {
time.Sleep(backoff)
backoff = min(backoff+time.Second, 10*time.Second)
continue
}
return resp, err
}
}

func (a *LLMAgent) verify(vctx *verifyContext) {
vctx.requireNotEmpty(a.Name, "Name", a.Name)
vctx.requireNotEmpty(a.Name, "Reply", a.Reply)
Expand Down
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