Hi Guys, I am facing similar issue. I have a new installation of Cloudera and i am trying to run a simple Map reduce Pi Example and also a spark Job. Map Reduce job gets stuck at the map 0% and reduce 0% step as shown below and Spark job is waiting spends lot of time in ACCEPTED state. I checked the user limit and it is blank for me.   test@spark-1 ~]$ sudo -u hdfs hadoop jar /data/cloudera/parcels/CDH/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar pi 10 100 Number of Maps = 10 Samples per Map = 100 Wrote input for Map #0 Wrote input for Map #1 Wrote input for Map #2 Wrote input for Map #3 Wrote input for Map #4 Wrote input for Map #5 Wrote input for Map #6 Wrote input for Map #7 Wrote input for Map #8 Wrote input for Map #9 Starting Job 18/10/16 12:33:25 INFO input.FileInputFormat: Total input paths to process : 10 18/10/16 12:33:26 INFO mapreduce.JobSubmitter: number of splits:10 18/10/16 12:33:26 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1539705370715_0002 18/10/16 12:33:26 INFO impl.YarnClientImpl: Submitted application application_1539705370715_0002 18/10/16 12:33:26 INFO mapreduce.Job: The url to track the job: http://spark-4:8088/proxy/application_1539705370715_0002/ 18/10/16 12:33:26 INFO mapreduce.Job: Running job: job_1539705370715_0002 18/10/16 12:33:31 INFO mapreduce.Job: Job job_1539705370715_0002 running in uber mode : false 18/10/16 12:33:31 INFO mapreduce.Job: map 0% reduce 0% I made multiple config changes, but cannot find a solution for this. The only error i could trace was in the nodemanager log file as below : ERROR org.apache.hadoop.yarn.server.nodemanager.NodeManager: RECEIVED SIGNAL 15: SIGTERM I tried checking various properties discussed in this thread, but i still have that issue. Can someone please help in solving this issue? Please let me know what all details i can provide.       ... View more

Ok, I resolved this problem by restart service cloudera-scm-server ... View more

Not an issue Mshirley, many thanks for your comments.   To be honest, I didn't check the cloudera-scm-agent logs after the restart so cannot say whether there were any errors reported. I'll keep that in mind next time onwards.   Also, /opt/cloudera/parcels directory contained 2 files - one was named CDH (a link to the CDH5.3 directory, I suppose) and the actual CDH5.3xxxx directory (sorry, cannot recollect the exact name) which contained the /lib /bin and several other parcel directories . And yes, we did try deactivating the old parcel before downloading the new one. Unfortunately, nothing worked.   Around the same time, we also did a reboot and noticed that one of the nodes did not come up. As a result, we were forced to do the re-installation again.  ... View more