NPE

Author: AlexeyKuznetsov-DD

communication/src/main/java/datadog/communication/ddagent/DDAgentFeaturesDiscovery.java

@@ -4,6 +4,7 @@
 import static datadog.communication.http.OkHttpUtils.msgpackRequestBodyOf;
 import static datadog.communication.http.OkHttpUtils.prepareRequest;
 import static datadog.communication.serialization.msgpack.MsgPackWriter.FIXARRAY;
+import static datadog.trace.api.ProtocolVersion.V0_4;
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.emptySet;
 import static java.util.Collections.singletonList;
@@ -114,7 +115,7 @@ public DDAgentFeaturesDiscovery(
     this.client = client;
     this.agentBaseUrl = agentUrl;
     this.metricsEnabled = metricsEnabled;
-    this.protocolVersion = protocolVersion;
+    this.protocolVersion = protocolVersion != null ? protocolVersion : V0_4;
     this.discoveryTimer = monitoring.newTimer("trace.agent.discovery.time");
     this.discoveryState = new State();
   }