From bd0c18b22d055ae1ad387ab7480df6132a506f85 Mon Sep 17 00:00:00 2001
From: kongfei <kongfei605@gmail.com>
Date: Mon, 23 Dec 2024 14:31:45 +0800
Subject: [PATCH] chore: do not attach pid tag for jstat when there is only one
 process

---
 inputs/procstat/procstat.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/inputs/procstat/procstat.go b/inputs/procstat/procstat.go
index 4bc5b9ee..ceb27a06 100644
--- a/inputs/procstat/procstat.go
+++ b/inputs/procstat/procstat.go
@@ -524,6 +524,10 @@ func (ins *Instance) gatherLimit(slist *types.SampleList, procs map[PID]Process,
 }
 
 func (ins *Instance) gatherJvm(slist *types.SampleList, procs map[PID]Process, tags map[string]string) {
+	attachPid := false
+	if len(procs) > 1 {
+		attachPid = true
+	}
 	for pid := range procs {
 		jvmStat, err := execJstat(pid)
 		if err != nil {
@@ -531,7 +535,10 @@ func (ins *Instance) gatherJvm(slist *types.SampleList, procs map[PID]Process, t
 			continue
 		}
 
-		pidTag := map[string]string{"pid": fmt.Sprint(pid)}
+		pidTag := map[string]string{}
+		if attachPid {
+			pidTag["pid"] = fmt.Sprint(pid)
+		}
 		for k, v := range jvmStat {
 			slist.PushSample(inputName, "jvm_"+k, v, pidTag, ins.makeCmdlineLabelReggroupTag(procs[pid]), tags)
 		}