Hi: I used to have CDH5.4.7.  I could start all hadoop yarn servers O.K. in pseudo distributed mode.  I just upgraded to 5.5 today.  I found that I couldn't start history server now.  The error is like the followings.   I checked 'netstat'.  Port 19888 is not binded to any process.  If I changed mapreduce.jobhistory.webapp.address in mapred-site.xml to 19088.   I would get the similar error with Port in use: 19088.  Please advise how I can resolve this issue or is this a bug.Thanks.   6/01/02 15:15:52 INFO service.AbstractService: Service HistoryClientService failed in state STARTED; cause: org.apache.hadoop.yarn.webapp.WebAppException: Error starting http server org.apache.hadoop.yarn.webapp.WebAppException: Error starting http server at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:278) at org.apache.hadoop.mapreduce.v2.hs.HistoryClientService.initializeWebApp(HistoryClientService.java:156) at org.apache.hadoop.mapreduce.v2.hs.HistoryClientService.serviceStart(HistoryClientService.java:121) at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) at org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120) at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.serviceStart(JobHistoryServer.java:197) at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.launchJobHistoryServer(JobHistoryServer.java:223) at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.main(JobHistoryServer.java:232) Caused by: java.net.BindException: Port in use: ununtu:19888 at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:944) at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:880) at org.apache.hadoop.yarn.webapp.WebApps$Builder.start(WebApps.java:273) ... 8 more Caused by: java.net.BindException: Cannot assign requested address at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:444) at sun.nio.ch.Net.bind(Net.java:436) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216) at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:939) ... 10 more ... View more