Spark job fails with fixed LlapTaskUmbilicalServer port

Caused by: java.net.BindException: Problem binding to [0.0.0.0:30006] java.net.BindException: Address already in use; For more details see:  http://wiki.apache.org/hadoop/BindException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:840)
	at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:741)
	at org.apache.hadoop.ipc.Server.bind(Server.java:605)
	at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:1169)
	at org.apache.hadoop.ipc.Server.<init>(Server.java:3032)
	at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:1039)
	at org.apache.hadoop.ipc.WritableRpcEngine$Server.<init>(WritableRpcEngine.java:438)
	at org.apache.hadoop.ipc.WritableRpcEngine.getServer(WritableRpcEngine.java:332)
	at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:848)
	at org.apache.hadoop.hive.llap.tezplugins.helpers.LlapTaskUmbilicalServer.<init>(LlapTaskUmbilicalServer.java:67)
	at org.apache.hadoop.hive.llap.ext.LlapTaskUmbilicalExternalClient$SharedUmbilicalServer.<init>(LlapTaskUmbilicalExternalClient.java:122)
	... 26 more
Caused by: java.net.BindException: Address already in use
	at sun.nio.ch.Net.bind0(Native Method)
	at sun.nio.ch.Net.bind(Net.java:433)
	at sun.nio.ch.Net.bind(Net.java:425)
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:220)
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:85)
	at org.apache.hadoop.ipc.Server.bind(Server.java:588)
	... 34 more