Exception Resolution
1, 401 Unauthorized:error Failed to connect to newly launched supervisor. Agent would exit
this is because after the agent is started on the master node, and the agent SCP to the other nodes, the first time you start the agent, it will generate a UUID, the path is:/opt/cm-xxx/lib/cloudera-scm-agent/uuid, In this way, each machine on the agent's UUID is the same, there will be a situation of disorder.
Solution:
Delete all files under the/opt/xxxx/lib/cloudera-scm-agent/directory.
Empty the master node cm database.
2, java.io.IOException:Incompatible clusterids in/dfs/dn
Check your hdfs-site.xml file to see where dfs.data.dir are pointing to
and Delete that folder
And then restart the Datanode daemon on the machine
Delete Linux/DFS/DN data
3. Cloudera java.io.IOException:No space left on device
because there's not enough Hadoop data space
4, Cloudera org.apache.hadoop.hbase.TableExistsException:hbase:namespace
Delete HBase under the Zookeeper directory
Cloudera installation, operation exception information collection
