WIP: Checking last parent ID behavior

Author: PerfectSlayer

dd-trace-core/src/main/java/datadog/trace/core/propagation/W3CHttpCodec.java

@@ -81,16 +81,16 @@ private <C> void injectTraceParent(DDSpanContext context, C carrier, CarrierSett
 
     private <C> void injectTraceState(DDSpanContext context, C carrier, CarrierSetter<C> setter) {
       PropagationTags propagationTags = context.getPropagationTags();
-      if (propagationTags.getLastParentId() == null) {
-        if (context.isRemote()) {
-          CharSequence lastParentId = context.getLastParentId();
-          if (lastParentId != null) {
-            propagationTags.updateLastParentId(lastParentId);
-          }
-        } else {
-          propagationTags.updateLastParentId(DDSpanId.toHexStringPadded(context.getSpanId()));
-        }
-      }
+      //      if (propagationTags.getLastParentId() == null) {
+      //        if (context.isRemote()) {
+      //          CharSequence lastParentId = context.getLastParentId();
+      //          if (lastParentId != null) {
+      //            propagationTags.updateLastParentId(lastParentId);
+      //          }
+      //        } else {
+      propagationTags.updateLastParentId(DDSpanId.toHexStringPadded(context.getSpanId()));
+      //        }
+      //      }
 
       String tracestate = propagationTags.headerValue(W3C);
       if (tracestate != null && !tracestate.isEmpty()) {