error log with cassandra running before tomcat

dh@openblockchain-api:/opt/tomcat/bin$ sudo -u tomcat ./catalina.sh run
Using CATALINA_BASE:   /opt/tomcat
Using CATALINA_HOME:   /opt/tomcat
Using CATALINA_TMPDIR: /opt/tomcat/temp
Using JRE_HOME:        /usr
Using CLASSPATH:       /opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar
25-May-2016 04:01:38.460 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version:        Apache Tomcat/8.0.35
25-May-2016 04:01:38.463 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built:          May 11 2016 21:57:08 UTC
25-May-2016 04:01:38.463 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number:         8.0.35.0
25-May-2016 04:01:38.463 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name:               Linux
25-May-2016 04:01:38.464 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:            3.13.0-85-generic
25-May-2016 04:01:38.464 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture:          amd64
25-May-2016 04:01:38.464 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home:             /usr/lib/jvm/java-7-oracle/jre
25-May-2016 04:01:38.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version:           1.7.0_80-b15
25-May-2016 04:01:38.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor:            Oracle Corporation
25-May-2016 04:01:38.465 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE:         /opt/tomcat
25-May-2016 04:01:38.466 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME:         /opt/tomcat
25-May-2016 04:01:38.466 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties
25-May-2016 04:01:38.467 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
25-May-2016 04:01:38.467 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
25-May-2016 04:01:38.467 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.endorsed.dirs=/opt/tomcat/endorsed
25-May-2016 04:01:38.467 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/tomcat
25-May-2016 04:01:38.468 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/tomcat
25-May-2016 04:01:38.468 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/tomcat/temp
25-May-2016 04:01:38.468 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
25-May-2016 04:01:38.678 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]
25-May-2016 04:01:38.720 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
25-May-2016 04:01:38.725 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]
25-May-2016 04:01:38.727 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
25-May-2016 04:01:38.731 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 914 ms
25-May-2016 04:01:38.785 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina
25-May-2016 04:01:38.795 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.35
25-May-2016 04:01:38.823 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /opt/tomcat/webapps/openblockchain-api.war
25-May-2016 04:01:47.712 INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
04:01:48.133 [localhost-startStop-1] INFO  o.scalatra.servlet.ScalatraListener - The cycle class name from the config: ScalatraBootstrap
04:01:48.599 [localhost-startStop-1] INFO  com.datastax.driver.core.NettyUtil - Found Netty's native epoll transport in the classpath, using it
04:01:48.693 [localhost-startStop-1] ERROR o.scalatra.servlet.ScalatraListener - Failed to initialize scalatra application at /openblockchain-api
java.lang.NoSuchMethodError: io.netty.util.UniqueName.<init>(Ljava/lang/String;)V
	at io.netty.channel.ChannelOption.<init>(ChannelOption.java:136)
	at io.netty.channel.ChannelOption.valueOf(ChannelOption.java:99)
	at io.netty.channel.ChannelOption.<clinit>(ChannelOption.java:42)
	at com.datastax.driver.core.Connection$Factory.newBootstrap(Connection.java:805)
	at com.datastax.driver.core.Connection$Factory.access$100(Connection.java:677)
	at com.datastax.driver.core.Connection.initAsync(Connection.java:129)
	at com.datastax.driver.core.Connection$Factory.open(Connection.java:731)
	at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:251)
	at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:199)
	at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:77)
	at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1414)
	at com.datastax.driver.core.Cluster.init(Cluster.java:162)
	at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:333)
	at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:308)
	at com.datastax.driver.core.Cluster.connect(Cluster.java:250)
	at com.websudos.phantom.connectors.DefaultSessionProvider.createSession(DefaultSessionProvider.scala:50)
	at com.websudos.phantom.connectors.DefaultSessionProvider.<init>(DefaultSessionProvider.scala:54)
	at com.websudos.phantom.connectors.KeySpaceDef.<init>(Keyspace.scala:63)
	at com.websudos.phantom.connectors.KeySpaceBuilder.keySpace(KeySpaceBuilder.scala:53)
	at org.dyne.danielsan.openblockchain.data.connector.Config$.<init>(config.scala:13)
	at org.dyne.danielsan.openblockchain.data.connector.Config$.<clinit>(config.scala)
	at org.dyne.danielsan.openblockchain.data.database.ChainDatabase$.<init>(Database.scala:66)
	at org.dyne.danielsan.openblockchain.data.database.ChainDatabase$.<clinit>(Database.scala)
	at ScalatraBootstrap.<init>(ScalatraBootstrap.scala:17)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at java.lang.Class.newInstance(Class.java:383)
	at org.scalatra.servlet.ScalatraListener.probeForCycleClass(ScalatraListener.scala:55)
	at org.scalatra.servlet.ScalatraListener.configureCycleClass(ScalatraListener.scala:63)
	at org.scalatra.servlet.ScalatraListener.contextInitialized(ScalatraListener.scala:22)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4813)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5272)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:940)
	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1816)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
25-May-2016 04:01:48.694 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file