"Access denied" in install or update wizard
"Access denied" in install or update wizard during database configuration for Activity Monitor or Reports Manager.
Hostname mapping or permissions are not set up correctly.
- For hostname configuration, see Configure Network Names.
- For permissions, make sure the values you enter into the wizard
match those you used when you configured the databases. The value
you enter into the wizard as the database hostname must match
the value you entered for the hostname (if any) when you configured the
For example, if you had entered the following when you created the database
grant all on activity_monitor.* TO 'amon_user'@'myhost1.myco.com' IDENTIFIED BY 'amon_password';
the value you enter here for the database hostname must be
myhost1.myco.com. If you did not specify a host, or used a wildcard to allow access from any host, you can enter either the fully qualified domain name (FQDN), or
localhost. For example, if you entered
grant all on activity_monitor.* TO 'amon_user'@'%' IDENTIFIED BY 'amon_password';
the value you enter for the database hostname can be either the FQDN or
Cluster hosts do not appear
Some cluster hosts do not appear when you click Find Hosts in install or update wizard.
You might have network connectivity problems.
- Make sure all cluster hosts have SSH port 22 open.
- Check other common causes of loss of connectivity such as firewalls and interference from SELinux.
Cannot start services after upgrade
You have upgraded the Cloudera Manager Server, but now cannot start services.
You might have mismatched versions of the Cloudera Manager Server and Agents.
Make sure you have upgraded the Cloudera Manager Agents on all hosts. (The previous version of the Agents will heartbeat with the new version of the Server, but you cannot start HDFS and MapReduce with this combination.)
HDFS DataNodes fail to start
After upgrading, HDFS DataNodes fail to start with exception:
Exception in secureMainjava.lang.RuntimeException: Cannot start datanode because the configured max locked memory size (dfs.datanode.max.locked.memory) of 4294967296 bytes is more than the datanode's available RLIMIT_MEMLOCK ulimit of 65536 bytes.
HDFS caching, which is enabled by default in CDH 5 and higher, requires new memlock functionality from Cloudera Manager Agents.
Do the following:
- Stop all CDH and managed services.
- On all hosts with Cloudera Manager Agents, hard-restart the
Agents. Before performing this step, ensure you understand the
semantics of the
hard_restartcommand by reading Cloudera Manager Agents.
- RHEL 7, SLES 12, Ubuntu 18.04 and higher
sudo systemctl stop supervisord sudo systemctl start cloudera-scm-agent
- RHEL 5 or 6, SLES 11, Debian 6 or 7, Ubuntu 12.04 or 14.04
sudo service cloudera-scm-agent hard_restart
- Start all services.
Cloudera services fail to start
Cloudera services fail to start.
Java might not be installed or might be installed at a custom location.
See Configuring a Custom Java Home Location for more information on resolving this issue.