From 626e649b56d27d7385bfa1caf30805c11bc3c3f0 Mon Sep 17 00:00:00 2001
From: Kannan J <kannanjgithub@google.com>
Date: Mon, 24 Aug 2026 03:32:31 +0000
Subject: [PATCH] xds: Make timestamp tracking variables volatile in
 ExternalProcessorClientInterceptor to fix data race reported by TSAN

---
 .../io/grpc/xds/ExternalProcessorClientInterceptor.java   | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xds/src/main/java/io/grpc/xds/ExternalProcessorClientInterceptor.java b/xds/src/main/java/io/grpc/xds/ExternalProcessorClientInterceptor.java
index 80cfb0ac2ce..0bc79e5ec5d 100644
--- a/xds/src/main/java/io/grpc/xds/ExternalProcessorClientInterceptor.java
+++ b/xds/src/main/java/io/grpc/xds/ExternalProcessorClientInterceptor.java
@@ -297,10 +297,10 @@ private static class DataPlaneClientCall
     private final String backendService;
     private volatile Context callContext = Context.ROOT;
 
-    private long clientHeadersStartNanos;
-    private long clientHalfCloseStartNanos;
-    private long serverHeadersStartNanos;
-    private long serverTrailersStartNanos;
+    private volatile long clientHeadersStartNanos;
+    private volatile long clientHalfCloseStartNanos;
+    private volatile long serverHeadersStartNanos;
+    private volatile long serverTrailersStartNanos;
 
     private boolean protocolConfigSent = false;
     private ImmutableMap<String, Struct> collectedAttributes;