Lohit Vijayarenu created YARN-1032: -------------------------------------- Summary: NPE in RackResolve Key: YARN-1032 URL: https://issues.apache.org/jira/browse/YARN-1032 Project: Hadoop YARN Issue Type: Bug Affects Versions: 2.0.5-alpha Environment: linux Reporter: Lohit Vijayarenu Priority: Minor
We found a case where our rack resolve script was not returning rack due to problem with resolving host address. This exception was see in RackResolver.java as NPE, ultimately caught in RMContainerAllocator. {noformat} 2013-08-01 07:11:37,708 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator: ERROR IN CONTACTING RM. java.lang.NullPointerException at org.apache.hadoop.yarn.util.RackResolver.coreResolve(RackResolver.java:99) at org.apache.hadoop.yarn.util.RackResolver.resolve(RackResolver.java:92) at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assignMapsWithLocality(RMContainerAllocator.java:1039) at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assignContainers(RMContainerAllocator.java:925) at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.assign(RMContainerAllocator.java:861) at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator$ScheduledRequests.access$400(RMContainerAllocator.java:681) at org.apache.hadoop.mapreduce.v2.app.rm.RMContainerAllocator.heartbeat(RMContainerAllocator.java:219) at org.apache.hadoop.mapreduce.v2.app.rm.RMCommunicator$1.run(RMCommunicator.java:243) at java.lang.Thread.run(Thread.java:722) {noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira