There is documentation for how to enable Kudu security on CDH 5.13.0 here: https://www.cloudera.com/documentation/enterprise/5-13-x/topics/kudu_security.html#concept_syg_k35_lz   Please follow those steps and let us know if it still doesn't work for you.   Thanks, Mike ... View more

Some more questions:   When was the last time the cluster worked? What has changed since then? ... View more

Can you access the role log files through Cloudera Manager? ... View more

> 3) Do you see any errors when you run the following command? >  > sudo -u kudu kudu cluster ksck <master-addresses> >  > See https://www.cloudera.com/documentation/enterprise/5-13-x/topics/kudu_administration_cli.html#ksck for documentation on running ksck. => yes a lot...   OK, you will need to take a look at the tserver logs to figure out what is going on. But it sounds like something is wrong with your tablet servers. Can you post any error messages you see in kudu-tserver.INFO logs?   > 4) Is Impala configured with the correct --kudu_master_hosts flag? It should be configured to talk to all of the > masters. See https://www.cloudera.com/documentation/enterprise/5-13-x/topics/kudu_impala.html for > documentation on that.   No, how can I configue  --kudu_master_hosts in cloudera manager, I don't find this setting ? I just checked my dev cluster and you probably don't have to change anything; Cloudera Manager will automatically set it for Impala if you have a Kudu Service configured for it. I think your problem is with your Kudu tablet servers, not with Impala. ... View more

It sounds like Impala might be configured to talk to the wrong master, or one of the Kudu masters is stuck and needs to be repaired.   1) How many Kudu master servers are you running?   2) Do you see any error messages in the Kudu master log file(s)?   3) Do you see any errors when you run the following command?   sudo -u kudu kudu cluster ksck <master-addresses> See https://www.cloudera.com/documentation/enterprise/5-13-x/topics/kudu_administration_cli.html#ksck for documentation on running ksck.     4) Is Impala configured with the correct --kudu_master_hosts flag? It should be configured to talk to all of the masters. See https://www.cloudera.com/documentation/enterprise/5-13-x/topics/kudu_impala.html for documentation on that. ... View more

Unfortunately you are already past the number of recommended / supported tablets per server, see https://www.cloudera.com/documentation/enterprise/latest/topics/kudu_limitations.html#scaling_limits   In general it will require engineering work to push past that limit and we don't have anyone working on it at the moment. ... View more

However I see you wrote a separate forum post which is good, we try to stick with one topic per thread in the forums. ... View more

Kudu is only a storage engine. If you want sophisticated query processing capabilities, you have to use a query engine on top of Kudu that has an integration. Mainly that would be Impala or Spark. You can use JDBC or Spark APIs to access those systems from Java.   Here is how to use Impala with Kudu: https://www.cloudera.com/documentation/enterprise/5-14-x/topics/kudu_impala.html   Here is a blog article showing how to use Spark with Kudu in Java: https://blog.cloudera.com/blog/2017/02/up-and-running-with-apache-spark-on-apache-kudu/   Does that answer your question? ... View more