Add error reporting documentation.
MODIFY
dd-trace/docs/opentracing-api.md
dd-trace/docs/opentracing-api.md
@@ -114,6 +114,23 @@ Baggage is very similar to tags, but has important distinctions. Baggage is:
valuableSpan.setBaggageItem("username", "modernmajorgeneral");
```
+### Errors
+
+Errors are manually captured in a span by setting the error flag and logging the error attributes.
+
+```java
+ try {
+ // your code
+ } catch (Exception e) {
+ // capture error
+ ActiveSpan span = GlobalTracer.get().activeSpan();
+ Tags.ERROR.set(span, Boolean.TRUE);
+ span.log(Collections.singletonMap("error.object", e));
+
+ // recovery code
+ }
+```
+
## OpenTracing Asynchronous API
An `ActiveSpan` can generate a `Continuation` as a way of propagating traces from across a thread boundary.

Add error reporting documentation.