[HDFS-15561] RBF: Fix NullPointException when start dfsrouter

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.4.0
• Component/s: rbf
• Labels: pull-request-available
• Target Version/s: 3.3.1, 3.4.0
• Hadoop Flags: Reviewed
• Assignee: Fengnan Li
• Reporter: Xie Lei
• Created: 08/Sep/20 12:03
• Updated: 16/Jan/24 09:00
• Resolved: 29/Apr/21 13:17

Description

when start dfsrouter, it throw NPE

2020-09-08 19:41:14,989 ERROR org.apache.hadoop.hdfs.server.federation.router.NamenodeHeartbeatService: Unexpected exception while communicating with null:null: java.net.UnknownHostException: null2020-09-08 19:41:14,989 ERROR org.apache.hadoop.hdfs.server.federation.router.NamenodeHeartbeatService: Unexpected exception while communicating with null:null: java.net.UnknownHostException: nulljava.lang.IllegalArgumentException: java.net.UnknownHostException: null at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:447) at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:171) at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:123) at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:95) at org.apache.hadoop.hdfs.server.federation.router.NamenodeHeartbeatService.getNamenodeStatusReport(NamenodeHeartbeatService.java:248) at org.apache.hadoop.hdfs.server.federation.router.NamenodeHeartbeatService.updateState(NamenodeHeartbeatService.java:205) at org.apache.hadoop.hdfs.server.federation.router.NamenodeHeartbeatService.periodicInvoke(NamenodeHeartbeatService.java:159) at org.apache.hadoop.hdfs.server.federation.router.PeriodicService$1.run(PeriodicService.java:178) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:300) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) at java.base/java.lang.Thread.run(Thread.java:844)Caused by: java.net.UnknownHostException: null ... 14 more

 

Issue Links

• links to: GitHub Pull Request #2954