支持span event

Author: yuqian.wjm

tracer-core/src/main/java/com/alipay/common/tracer/core/span/SofaTracerSpan.java

@@ -221,8 +221,9 @@ public void addEvent(SpanEventData eventData) {
     private void reportEvent() {
         SpanEventData spanEventData = events.poll();
         while (spanEventData != null && eventNum.decrementAndGet() >= 0) {
-            this.eventData = spanEventData;
-            this.sofaTracer.reportEvent(this);
+            SofaTracerSpan span = this.cloneInstance();
+            span.setEventData(spanEventData);
+            this.sofaTracer.reportEvent(span);
             spanEventData = events.poll();
         }
     }

tracer-core/src/test/java/com/alipay/common/tracer/core/tracertest/SofaTracerTest.java

@@ -144,6 +144,8 @@ public void testReportSpan() {
                 .withTag(Tags.SPAN_KIND.getKey(), Tags.SPAN_KIND_CLIENT).start();
         //Report Do not prohibit writing
         span.addEvent(SpanEventData.builder().setEventTag("kkk11", "vvv22").build());
+        span.addEvent(SpanEventData.builder().setEventTag("kkk222", "vvv33").build());
+
         span.finish();
 
         TestUtil.periodicallyAssert(() -> {