If transform throw exception, the stream observer won't call the onCompleted...

If transform throw exception, the stream observer won't call the onCompleted method, then the stream observer will wait it finish until the timeout. (#3163)

apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/TraceSegmentServiceClient.java

@@ -113,13 +113,14 @@ public class TraceSegmentServiceClient implements BootService, IConsumer<TraceSe
                     UpstreamSegment upstreamSegment = segment.transform();
                     upstreamSegmentStreamObserver.onNext(upstreamSegment);
                 }
-                upstreamSegmentStreamObserver.onCompleted();
-
-                status.wait4Finish();
-                segmentUplinkedCounter += data.size();
             } catch (Throwable t) {
                 logger.error(t, "Transform and send UpstreamSegment to collector fail.");
             }
+
+            upstreamSegmentStreamObserver.onCompleted();
+
+            status.wait4Finish();
+            segmentUplinkedCounter += data.size();
         } else {
             segmentAbandonedCounter += data.size();
         }