Facing the below error while running data-server in 18.1 version even after placing permanent license?

[main] INFO com.appian.data.TopologyFactory - Loading topology /appian/data-server/conf/appian-topology.xml
281 [main] INFO com.appian.data.server.config.CustomPropertiesConfiguration - Configuration file custom.properties was loaded successfully. (Reload check = 30000 ms)
291 [main] INFO com.appian.data.server.Watchdog - Initializing log4j (processName=wd-5400, logsDir=/appian/data-server/../logs/data-server) from /appian/data-server/conf/log4j.properties
2018-04-15 23:45:23,408 wd-5400 [main] INFO com.appian.data.server.JvmStarter - Starting JVM: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-3.b14.el6_9.x86_64/jre/bin/java -server -Duser.timezone=GMT -Xms64m -Xmx128m -Dds.home=/appian/data-server -cp /appian/data-server/lib/appian-data-server-classpath-0.72.2.jar com.appian.data.server.Watchdog -f
2018-04-15 23:45:25,385 wd-5400 [main] ERROR com.appian.data.server.Watchdog - Shutting down with exit code 1...
com.appian.data.server.UnrecoverableError: Could not establish WebSocket connection with localhost:5400. The target JVM process exited abnormally. Check for earlier errors (e.g. JVM startup errors).
at com.appian.data.server.HeartbeatListener$SyncHeartbeatListenerBuilder.create(HeartbeatListener.java:157)
at com.appian.data.server.JvmStarter.startSync(JvmStarter.java:45)
at com.appian.data.server.Watchdog.main(Watchdog.java:697)
Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: /0.0.0.0:5400
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:347)
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:627)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:551)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:465)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:437)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)
at java.lang.Thread.run(Thread.java:748)