Fix NPE when label value is null

Signed-off-by: max-melentyev <[email protected]>
prometheus · Jan 20, 2025 · fe49d77 · fe49d77
1 parent 0ee705c
commit fe49d77
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/...ion-textformats/src/main/java/io/prometheus/metrics/expositionformats/TextFormatUtil.java b/...ion-textformats/src/main/java/io/prometheus/metrics/expositionformats/TextFormatUtil.java
@@ -35,6 +35,9 @@ static void writeTimestamp(Writer writer, long timestampMs) throws IOException {
   }
 
   static void writeEscapedLabelValue(Writer writer, String s) throws IOException {
+    if (s == null) {
+      return;
+    }
     for (int i = 0; i < s.length(); i++) {
       char c = s.charAt(i);
       switch (c) {