diff --git a/src/main/java/net/snowflake/ingest/streaming/internal/FlushService.java b/src/main/java/net/snowflake/ingest/streaming/internal/FlushService.java
index 8016f9b5c..90632a76a 100644
--- a/src/main/java/net/snowflake/ingest/streaming/internal/FlushService.java
+++ b/src/main/java/net/snowflake/ingest/streaming/internal/FlushService.java
@@ -174,7 +174,7 @@ List<List<ChannelData<T>>> getData() {
     this.isNeedFlush = false;
     this.lastFlushTime = System.currentTimeMillis();
     this.isTestMode = isTestMode;
-    this.latencyTimerContextMap = new HashMap<>();
+    this.latencyTimerContextMap = new ConcurrentHashMap<>();
     this.bdecVersion = this.owningClient.getParameterProvider().getBlobFormatVersion();
     createWorkers();
   }