lower default refresh timings

enterprise/causal-clustering/src/main/java/org/neo4j/causalclustering/core/CausalClusteringSettings.java

@@ -314,25 +314,25 @@ public class CausalClusteringSettings implements LoadableConfig
 
     @Description( "Time between scanning the cluster to refresh current server's view of topology" )
     public static final Setting<Long> cluster_topology_refresh =
-            setting( "causal_clustering.cluster_topology_refresh", DURATION, "1m", min( 1_000L ) );
+            setting( "causal_clustering.cluster_topology_refresh", DURATION, "5s", min( 1_000L ) );
 
     @Description( "An ordered list in descending preference of the strategy which read replicas use to choose " +
             "upstream database server from which to pull transactional updates." )
     public static final Setting<List<String>> upstream_selection_strategy =
             setting( "causal_clustering.upstream_selection_strategy", list( ",", STRING ), "default" );
 
     @Description( "Tags for the server used when configuring load balancing and replication policies." )
-    public static Setting<List<String>> server_tags =
+    public static final Setting<List<String>> server_tags =
             setting( "causal_clustering.server_tags", list( ",", STRING ), "" );
 
     @Description( "The load balancing plugin to use." )
-    public static Setting<String> load_balancing_plugin =
+    public static final Setting<String> load_balancing_plugin =
             setting( "causal_clustering.load_balancing.plugin", STRING, "server_policies" );
 
     @Description( "The configuration must be valid for the configured plugin and usually exists" +
             "under matching subkeys, e.g. ..config.server_policies.*" +
             "This is just a top-level placeholder for the plugin-specific configuration." )
-    public static Setting<String> load_balancing_config =
+    public static final Setting<String> load_balancing_config =
             setting( "causal_clustering.load_balancing.config", STRING, "" );
 
     @Description( "Enables shuffling of the returned load balancing result." )

enterprise/causal-clustering/src/test/java/org/neo4j/causalclustering/discovery/CoreClusterMember.java

@@ -42,9 +42,9 @@
 import org.neo4j.kernel.configuration.BoltConnector;
 import org.neo4j.kernel.configuration.Config;
 import org.neo4j.kernel.configuration.HttpConnector;
+import org.neo4j.kernel.configuration.HttpConnector.Encryption;
 import org.neo4j.kernel.configuration.Settings;
 import org.neo4j.logging.Level;
-import org.neo4j.kernel.configuration.HttpConnector.Encryption;
 
 import static java.lang.String.format;
 import static java.util.stream.Collectors.joining;
@@ -86,6 +86,7 @@ public CoreClusterMember( int serverId, int clusterSize,
         config.put( CausalClusteringSettings.discovery_listen_address.name(), "127.0.0.1:" + hazelcastPort );
         config.put( CausalClusteringSettings.transaction_listen_address.name(), "127.0.0.1:" + txPort );
         config.put( CausalClusteringSettings.raft_listen_address.name(), "127.0.0.1:" + raftPort );
+        config.put( CausalClusteringSettings.cluster_topology_refresh.name(), "1000ms" );
         config.put( CausalClusteringSettings.expected_core_cluster_size.name(), String.valueOf( clusterSize ) );
         config.put( CausalClusteringSettings.leader_election_timeout.name(), "500ms" );
         config.put( CausalClusteringSettings.raft_messages_log_enable.name(), Settings.TRUE );
@@ -118,6 +119,7 @@ public CoreClusterMember( int serverId, int clusterSize,
         clusterStateDir = ClusterStateDirectory.withoutInitializing( dataDir ).get();
         raftLogDir = new File( clusterStateDir, RAFT_LOG_DIRECTORY_NAME );
         storeDir = new File( new File( dataDir, "databases" ), "graph.db" );
+        //noinspection ResultOfMethodCallIgnored
         storeDir.mkdirs();
     }