From 5bcf766e8925fc46397a6c07f1738f8c8f21abda Mon Sep 17 00:00:00 2001
From: "blake.qiu" <blake.qiu@ly.com>
Date: Thu, 27 Oct 2022 17:49:08 +0800
Subject: [PATCH] Fix the issue that there is a redundant comma in the output.
 (#817)

---
 .../io/prometheus/client/exporter/common/TextFormat.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/simpleclient_common/src/main/java/io/prometheus/client/exporter/common/TextFormat.java b/simpleclient_common/src/main/java/io/prometheus/client/exporter/common/TextFormat.java
index db2de3a5b..8d5647ec5 100644
--- a/simpleclient_common/src/main/java/io/prometheus/client/exporter/common/TextFormat.java
+++ b/simpleclient_common/src/main/java/io/prometheus/client/exporter/common/TextFormat.java
@@ -117,7 +117,11 @@ public static void write004(Writer writer, Enumeration<Collector.MetricFamilySam
             writer.write(sample.labelNames.get(i));
             writer.write("=\"");
             writeEscapedLabelValue(writer, sample.labelValues.get(i));
-            writer.write("\",");
+            if (i < sample.labelNames.size() - 1) {
+              writer.write("\",");
+            } else {
+              writer.write("\"");
+            }
           }
           writer.write('}');
         }