Make UNKNOWN healthcheck state default in ClusterStats builder

Author: prakhar10

gateway-ha/src/main/java/io/trino/gateway/ha/clustermonitor/ClusterStats.java

@@ -41,7 +41,7 @@ public static final class Builder
         private int runningQueryCount;
         private int queuedQueryCount;
         private int numWorkerNodes;
-        private TrinoStatus trinoStatus;
+        private TrinoStatus trinoStatus = TrinoStatus.UNKNOWN;
         private String proxyTo;
         private String externalUrl;
         private String routingGroup;

gateway-ha/src/main/java/io/trino/gateway/ha/resource/GatewayWebAppResource.java

@@ -16,7 +16,6 @@
 import com.google.common.base.Strings;
 import com.google.inject.Inject;
 import io.trino.gateway.ha.clustermonitor.ClusterStats;
-import io.trino.gateway.ha.clustermonitor.TrinoStatus;
 import io.trino.gateway.ha.config.ProxyBackendConfiguration;
 import io.trino.gateway.ha.domain.Result;
 import io.trino.gateway.ha.domain.TableData;
@@ -98,12 +97,7 @@ public Response getAllBackends()
             backendResponse.setName(b.getName());
             backendResponse.setProxyTo(b.getProxyTo());
             backendResponse.setActive(b.isActive());
-            if (Objects.isNull(backendState.trinoStatus())) {
-                backendResponse.setStatus(TrinoStatus.UNKNOWN.toString());
-            }
-            else {
-                backendResponse.setStatus(backendState.trinoStatus().toString());
-            }
+            backendResponse.setStatus(backendState.trinoStatus().toString());
             backendResponse.setRoutingGroup(b.getRoutingGroup());
             backendResponse.setExternalUrl(b.getExternalUrl());
             return backendResponse;