hadoop - Hmaster unexpectedly stopping while starting Hbase -

while starting hbase , hmaster exiting abruptly follwing error :-

    2015-07-17 20:52:36,136 debug [main] master.hmaster: master/master/218.93.250.18:60000 hconnection server-to-server retries=350     2015-07-17 20:52:37,969 error [main] master.hmastercommandline: master exiting     java.lang.runtimeexception: failed construction of master: class org.apache.hadoop.hbase.master.hmaster     @ org.apache.hadoop.hbase.master.hmaster.constructmaster(hmaster.java:3015)     @ org.apache.hadoop.hbase.master.hmastercommandline.startmaster(hmastercommandline.java:193)     @ org.apache.hadoop.hbase.master.hmastercommandline.run(hmastercommandline.java:135)     @ org.apache.hadoop.util.toolrunner.run(toolrunner.java:70)     @ org.apache.hadoop.hbase.util.servercommandline.domain(servercommandline.java:126)     @ org.apache.hadoop.hbase.master.hmaster.main(hmaster.java:3029) caused by: java.net.bindexception: cannot assign requested address     @ sun.nio.ch.net.bind0(native method)     @ sun.nio.ch.net.bind(net.java:444)     @ sun.nio.ch.net.bind(net.java:436)     @ sun.nio.ch.serversocketchannelimpl.bind(serversocketchannelimpl.java:214)     @ sun.nio.ch.serversocketadaptor.bind(serversocketadaptor.java:74)     @ org.apache.hadoop.hbase.ipc.rpcserver.bind(rpcserver.java:2462)     @ org.apache.hadoop.hbase.ipc.rpcserver$listener.<init>(rpcserver.java:588)     @ org.apache.hadoop.hbase.ipc.rpcserver.<init>(rpcserver.java:1942)     @ org.apache.hadoop.hbase.master.hmaster.<init>(hmaster.java:512)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:57)     @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45)     @ java.lang.reflect.constructor.newinstance(constructor.java:526)     @ org.apache.hadoop.hbase.master.hmaster.constructmaster(hmaster.java:3010) 

please suggest reason. following hbase-site.xml file :-

    <configuration>     <property>  <name>hbase.rootdir</name>  <value>hdfs://localhost:54310/hbase</value>  </property>   <property>  <name>hbase.cluster.distributed</name>  <value>true</value>  </property>   <property>  <name>hbase.zookeeper.quorum</name>  <value>localhost</value>  </property>   <property>  <name>dfs.replication</name>  <value>1</value>  </property>   <property>  <name>hbase.zookeeper.property.clientport</name>  <value>2181</value>  </property>   <property>  <name>hbase.zookeeper.property.datadir</name>  <value>/home/hduser/zookeeperdata</value>  </property>   </configuration> 

following hosts file configuration.

    127.0.0.1       localhost     127.0.0.1       xxx.xxx.xxx.xxx     # following lines desirable ipv6 capable hosts     ::1     ip6-localhost ip6-loopback     fe00::0 ip6-localnet     ff00::0 ip6-mcastprefix     ff02::1 ip6-allnodes     ff02::2 ip6-allrouters 

whats going wrong in this???