Gracefully handle zero buffer-limit

srebhan · srebhan · commit 2a70dc96c589 · 2026-03-04T14:16:44.000+01:00
diff --git a/plugins/outputs/heartbeat/statistics.go b/plugins/outputs/heartbeat/statistics.go
@@ -83,7 +83,11 @@ func (s *statistics) snapshot() *statistics {
 					entry[k] = v
 				}
 			}
-			entry["buffer_fullness"] = float64(entry["buffer_size"].(int64)) / float64(entry["buffer_limit"].(int64))
+			if limit := entry["buffer_limit"].(int64); limit != 0 {
+				entry["buffer_fullness"] = float64(entry["buffer_size"].(int64)) / float64(limit)
+			} else {
+				entry["buffer_fullness"] = float64(1.0) // output 100% if no limit
+			}
 			out.currentOutputs[name] = append(out.currentOutputs[name], entry)
 		case "agent":
 			out.currentAgent = m.Fields()

Original file line number	Diff line number	Diff line change
`@@ -83,7 +83,11 @@ func (s statistics) snapshot() statistics {`
`83`	`83`	`entry[k] = v`
`84`	`84`	`}`
`85`	`85`	`}`
`86`		`- entry["buffer_fullness"] = float64(entry["buffer_size"].(int64)) / float64(entry["buffer_limit"].(int64))`
	`86`	`+ if limit := entry["buffer_limit"].(int64); limit != 0 {`
	`87`	`+ entry["buffer_fullness"] = float64(entry["buffer_size"].(int64)) / float64(limit)`
	`88`	`+ } else {`
	`89`	`+ entry["buffer_fullness"] = float64(1.0) // output 100% if no limit`
	`90`	`+ }`
`87`	`91`	`out.currentOutputs[name] = append(out.currentOutputs[name], entry)`
`88`	`92`	`case "agent":`
`89`	`93`	`out.currentAgent = m.Fields()`