diff --git a/observelib/observe/src/main/java/org/ballerinalang/observe/nativeimpl/OpenTracerBallerinaWrapper.java b/observelib/observe/src/main/java/org/ballerinalang/observe/nativeimpl/OpenTracerBallerinaWrapper.java
index 5f2de6059d9e..db62ec285ce0 100644
--- a/observelib/observe/src/main/java/org/ballerinalang/observe/nativeimpl/OpenTracerBallerinaWrapper.java
+++ b/observelib/observe/src/main/java/org/ballerinalang/observe/nativeimpl/OpenTracerBallerinaWrapper.java
@@ -27,9 +27,9 @@
 import org.ballerinalang.jvm.observability.tracer.TracersStore;
 import org.ballerinalang.jvm.scheduling.Strand;
 
-import java.util.HashMap;
-import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicLong;
 
 import static org.ballerinalang.jvm.observability.ObservabilityConstants.CONFIG_TRACING_ENABLED;
@@ -139,7 +139,7 @@ public boolean finishSpan(Strand strand, long spanId) {
             return false;
         }
     }
-    
+
     /**
      * Method to add tags to an existing span.
      *