I have upgrade Ambari from 2.4.2 to 2.5.0, After that I am not able to login into ambari getting following error in ambari-server.log file, 18 May 2017 07:56:33,975 ERROR [ambari-client-thread-26] ContainerResponse:419 - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container com.google.common.cache.CacheLoader$InvalidCacheLoadException: CacheLoader returned null for key 58. at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2348) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2318) at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2280) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2195) at org.apache.ambari.server.security.AbstractSecurityHeaderFilter.doFilter(AbstractSecurityHeaderFilter.java:125) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1478) at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:231) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:748) 18 May 2017 07:56:33,977 WARN [ambari-client-thread-26] ServletHandler:561 - Error Processing URI: /api/v1/users/admin - (com.google.common.cache.CacheLoader$InvalidCacheLoadException) CacheLoader returned null for key 58. 18 May 2017 07:56:33,977 WARN [ambari-client-thread-26] ServletHandler:561 - Error Processing URI: /api/v1/users/admin - (com.google.common.cache.CacheLoader$InvalidCacheLoadException) CacheLoader returned null for key 58. screen-shot-2017-05-18-at-12654-pm.png
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