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RE: ipc.Client: Retrying connect to server - Hadoop - [mail # user]
...Does "netstat -an | grep LISTEN" show these ports being listened on?Can you stat hdfs from the command line e.g.:hdfs dfsadmin -reporthdfs fsck /hdfs dfs -ls /Also, check out /var/log/hadoop...
   Author: John Lilley, 2014-03-27, 12:41
[expand - 1 more] - Getting error message from AM container launch - Hadoop - [mail # user]
...Running a non-MapReduce YARN application, one of the containers launched by the AM is failing with an error message I've never seen.  Any ideas?  I'm not sure who exactly is runnin...
   Author: John Lilley, 2014-03-26, 22:38
[expand - 1 more] - ResourceManager shutting down - Hadoop - [mail # user]
...We have this erratic behavior where every so often the RM will shutdown with an UnknownHostException.  The odd thing is, the host it complains about have been in use for days at that po...
   Author: John Lilley, 2014-03-13, 20:52
[expand - 1 more] - Fetching configuration values from cluster - Hadoop - [mail # user]
...How would I go about fetching configuration values (e.g. yarn-site.xml) from the cluster via the API from an application not running on a cluster node?ThanksJohn ...
   Author: John Lilley, 2014-03-06, 17:47
[expand - 1 more] - Need help: fsck FAILs, refuses to clean up corrupt fs - Hadoop - [mail # user]
...I have a file system with some missing/corrupt blocks.  However, running hdfs fsck -delete also fails with errors.  How do I get around this?ThanksJohn[hdfs@metallica yarn]$ hdfs f...
   Author: John Lilley, 2014-03-04, 13:08
[expand - 1 more] - decommissioning a node - Hadoop - [mail # user]
...Our cluster has a node that reboot randomly.  So I've gone to Ambari, decommissioned its HDFS service, stopped all services, and deleted the node from the cluster.  I expected and ...
   Author: John Lilley, 2014-03-04, 12:47
ResourceManager crash on deleted NM node back from the dead - Hadoop - [mail # user]
...We had a DN/NM node that went offline for a while and been removed from the cluster via Ambari without decommissioning (because it was offline).When the node came back up, its NM attempted c...
   Author: John Lilley, 2014-03-03, 13:20
[expand - 1 more] - how to remove a dead node? - Hadoop - [mail # user]
...We have a node that died and had to be rebuilt.  However, its status is still showing in the dfsadmin reporthdfs dfsadmin -report[...]Dead datanodes:Name: 192.168.57.104:50010 (192.168....
   Author: John Lilley, 2014-03-01, 19:32
[expand - 1 more] - large CDR data samples - Hadoop - [mail # user]
...I would like to explore Call Data Record (CDR aka Call Detail Record) analysis, and to that end I'm looking for a large (GB+) CDR file or a program to synthesize a somewhat-realistic sample ...
   Author: John Lilley, 2014-03-01, 15:39
[expand - 1 more] - very long timeout on failed RM connect - Hadoop - [mail # user]
...Our application (running outside the Hadoop cluster) connects to the RM through YarnClient.  This works fine, except we've found that if the RM address or port is misconfigured in our s...
   Author: John Lilley, 2014-02-10, 14:45
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB