I got installed a new cloudera cluster with versions CM-6.3.1 and CDH-6.3.2 and now facing a problem never had with previous cloudera distributions.   Cloudera Management Services (including Cloudera Service Monitor), Impala (Sentry Enabled), and all other related processes are working fine. Individual users are able to authenticate with LDAP and can query tables to which they are authorized.   The problem is, the queries sent and executed to impala daemons   do not appear in the Impala Queries tab   in Cloudera Manager, although they can be observed in Completed Impala Queries chart, that is, there are changes in the queries/second metric when someone send a query, i checked the things discussed in the link below.   https://community.cloudera.com/t5/Support-Questions/Empty-Impala-queries-in-Cloudera-Manager/td-p/79812   No troubles in either   /var/log/cloudera-scm-firehose/mgmt-cmf-mgmt-SERVICEMONITOR-hostname.log.out   or  / var/log/cloudera-scm-server/cloudera-scm-server.log logs.   There is enough disk space in the   Service Monitor Storage Directory. And tried to set to different sizes from 1GB to 3GB   Impala Storage   (firehose_impala_storage_bytes)   Everything seems fine, yet there are no queries in the Cloudera Manager Impala Queries Web-UI. What might be the cause of this situation?   Any help would be highly appreciated, Thanks. ... View more

Hi,   I recently upgraded my Cloudera environment from 5.8.x (hadoop 2.6.0, hdfs-1) to 6.3.x (hadoop 3.0.0, hdfs-1) and after some days of data loads with   moveFromLocal, i just realized that the   DFS Used%   of datanode server on which i execute   moveFromLocal   are 3x more than that of others. Then having run   fsck with   -blocks,   -locations   and   -replicaDetails   flags over the hdfs path to which i load the data; i observed that replicated blocks (RF=2) are   all   on that same server and not being distributed to other nodes unless i manually run   hdfs balancer.   There was no such a problem in the Cloudera 5.8.x. Is there some new configuration should i make in Cloudera 6.3.x related to replication, rack awareness or something like that?   Any help would be highly appreciated. ... View more