Hi,
I am sure you have seen this many times. A simple hive query suddenly sits doing nothing. hive> select count(1) from t; Query ID = hduser_20151008095656_609106f0-d7e9-4d59-bacc-7e437537d9f6 Total jobs = 1 Launching Job 1 out of 1 Number of reduce tasks determined at compile time: 1 In order to change the average load for a reducer (in bytes): set hive.exec.reducers.bytes.per.reducer=<number> In order to limit the maximum number of reducers: set hive.exec.reducers.max=<number> In order to set a constant number of reducers: set mapreduce.job.reduces=<number> Starting Job = job_1444210557071_0011, Tracking URL = http://rhes564:8088/proxy/application_1444210557071_0011/ Kill Command = /home/hduser/hadoop-2.6.0/bin/hadoop job -kill job_1444210557071_0011 And this is what I am getting yarn log: 2015-10-08 09:56:18,791 INFO org.apache.hadoop.yarn.server.resourcemanager.ClientRMService: Application with id 11 submitted by user hduser 2015-10-08 09:56:18,791 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl: Storing application with id application_1444210557071_0011 2015-10-08 09:56:18,791 INFO org.apache.hadoop.yarn.server.resourcemanager.RMAuditLogger: USER=hduser IP=50.140.197.217 OPERATION=Submit Application Request TARGET=ClientRMService RESULT=SUCCESS APPID=application_1444210557071_0011 2015-10-08 09:56:18,791 INFO org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore: Storing info for app: application_1444210557071_0011 2015-10-08 09:56:18,791 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl: application_1444210557071_0011 State change from NEW to NEW_SAVING 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl: application_1444210557071_0011 State change from NEW_SAVING to SUBMITTED 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue : Application added - appId: application_1444210557071_0011 user: hduser leaf-queue of parent: root #applications: 2 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySch eduler: Accepted application application_1444210557071_0011 from user: hduser, in queue: default 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl: application_1444210557071_0011 State change from SUBMITTED to ACCEPTED 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService: Registering app attempt : appattempt_1444210557071_0011_000001 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl : appattempt_1444210557071_0011_000001 State change from NEW to SUBMITTED 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue: Application added - appId: application_1444210557071_0011 user: org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue$U ser@3793240f, leaf-queue: default #user-pending-applications: 1 #user-active-applications: 1 #queue-pending-applications: 1 #queue-active-applications: 1 2015-10-08 09:56:18,792 INFO org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySch eduler: Added Application Attempt appattempt_1444210557071_0011_000001 to scheduler from user hduser in queue default 2015-10-08 09:56:18,793 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl : appattempt_1444210557071_0011_000001 State change from SUBMITTED to SCHEDULED One solution to this problem is to restart Hadoop, hive and yarn. It will then work. However, I am not sure about the cause. Sounds like resources are not released for one reason or other! Mich Talebzadeh Sybase ASE 15 Gold Medal Award 2008 A Winning Strategy: Running the most Critical Financial Data on ASE 15 <http://login.sybase.com/files/Product_Overviews/ASE-Winning-Strategy-091908 .pdf> http://login.sybase.com/files/Product_Overviews/ASE-Winning-Strategy-091908. pdf Author of the books "A Practitioner's Guide to Upgrading to Sybase ASE 15", ISBN 978-0-9563693-0-7. co-author "Sybase Transact SQL Guidelines Best Practices", ISBN 978-0-9759693-0-4 Publications due shortly: Complex Event Processing in Heterogeneous Environments, ISBN: 978-0-9563693-3-8 Oracle and Sybase, Concepts and Contrasts, ISBN: 978-0-9563693-1-4, volume one out shortly <http://talebzadehmich.wordpress.com/> http://talebzadehmich.wordpress.com NOTE: The information in this email is proprietary and confidential. 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