Support for Cloudera Impala version 1.0. Impala 1.0 requires CDH4.1.x
or CDH 4.2.x. Cloudera Manager 4.5.2 only supports Impala 1.0; if you upgrade from an
earlier version of Cloudera Manager, and were using Impala, you must also upgrade Impala to
version 1.0. Previous beta versions of Impala are no longer supported as of the release of
Impala 1.0.
Cloudera Manager will now configure Hive to leverage the ZooKeeper service to guard
against potential corruption caused by concurrent usage of Hive, if there is a ZooKeeper
service in the cluster. This can be specified as a new Hive configuration, or Cloudera
Manager can use the ZooKeeper dependency from HDFS. When upgrading to Cloudera Manager
4.5.2, Hive will try to find a suitable ZooKeeper instance if none is currently set in HDFS.
You will need to restart Hive and re-deploy client configs to pick up the new concurrency
configuration. Without this configuration, you can get corruption in Hive in concurrent
scenarios, so it is strongly recommended that Hive is configured with a ZooKeeper
dependency.