This is the documentation for Cloudera Manager 4.8.3.
Documentation for other versions is available at Cloudera Documentation.

Incompatible Changes in Cloudera Manager 4

Incompatible Changes Introduced in Cloudera Manager 4.8.3

An issue with insufficient password hashing was fixed in Cloudera Manager 4.8.3. For information on the fix, see Insufficient password hashing in Cloudera Manager. Due to the fix, Cloudera Manager 4.8.3 cannot be upgraded to Cloudera Manager 5.0.0. It can only be upgraded to Cloudera Manager 5.0.1.

Incompatible Changes Introduced in Cloudera Manager 4.8.0

  • Cloudera Manager 4.8 supports only Impala 1.2.1 and later. This is due to the introduction of the Impala Catalog Server with Impala 1.2.1, which does not work with Impala 1.1. If you upgrade Cloudera Manager to 4.8, you must also upgrade your Impala to version 1.2.1. See Upgrading Impala for instructions. If you want to continue to use Impala 1.1.1, do not upgrade to Cloudera Manager 4.8.
  • Cloudera Manager 4.8.0 includes a change to the value of the snmpTrapOID. Earlier releases set the value of snmpTrapOID (OID: .1.3.6.1.6.3.1.1.4.1.0) wrongly to clouderaManagerMIBNotifications (OID .1.3.6.1.4.1.38374.1.1.1). This is fixed in Cloudera Manager 4.8.0 with the correct value, which is clouderaManagerAlert (OID .1.3.6.1.4.1.38374.1.1.1.1). This change will break SNMP server setups that are configured to expect clouderaManagerMIBNotifications. Cloudera Manager administrators should configure their SNMP receivers to accept the corrected OID.

Incompatible Changes Introduced in Cloudera Manager 4.6.0

Prior to Cloudera Manager 4.6.0, the Hive Service-level safety valve content (the Hive Service Configuration Safety Valve for hive-site.xml found on the Hive Service Configuration page, under the Service-Wide > Advanced category) was erroneously included in Hive Client Configuration, and was being deployed to /etc/hive/conf/hive-site.xml. It now correctly affects only Hive service roles. Customer who rely on the Service-level safety valve to affect Hive client configuration will need to make sure the correct configuration appears in the Client Safety Valve (Hive Client Configuration Safety Valve for hive-site.xml found under Hive's Gateway role group, under the Advanced category).

Incompatible Changes Introduced in Cloudera Manager 4.5.0

  • Alert Publisher by default sends alert email to "root@localhost", via port 25 (SMTP) on localhost. This can be configured during the wizard setup, or in the configuration settings of the Management Server's Alert Publisher.
  • By default, Hive will set hive.warehouse.subdir.inherit.perms to true. This is a minor change of behavior. If this change is undesired, change the configuration in the Hive service. This impacts upgrade in the following scenarios:
    • CDH3 cluster to CDH4 cluster using Cloudera Manager 4.5.
    • Cloudera Manager upgrade to Cloudera Manager 4.5, where Cloudera Manager is managing a CDH4 cluster.
  • Cloudera Manager 4.5 does not support Internet Explorer 8. Users who cannot or do not wish to upgrade to Internet Explorer 9 should not upgrade to Cloudera Manager 4.5.
  • The default Java GC options of NameNode, Secondary NameNode, DataNode, JobTracker, and TaskTracker are now set to:
    -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled
  • Cloudera Manager API v3 (new in Cloudera Manager 4.5) does not support setting a service's roletype configuration, since that has been replaced by the role group. Callers should set the configuration on the appropriate role group instead. Cloudera Manager 4.5 continues to support API v1 and v2. But users who want to upgrade their existing clients to v3 will need to rewrite any roletype configuration calls.

Incompatible Changes Introduced in Cloudera Manager 4.1.3

Cloudera Manager 4.1.3 supports only version 0.4 of the Cloudera Impala Beta Release. It does not support the earlier beta versions. If you upgrade your Cloudera Manager installation, you must also upgrade Impala to beta version 0.4. If you upgrade Impala to beta version 0.4, you must upgrade Cloudera Manager to 4.1.3.

Incompatible Changes Introduced in Cloudera Manager 4.1.2

  • The alternatives priority of MapReduce 1 (MR1) is now higher than that of MR2 (YARN). This means that the MR1 configuration will take priority by default. In previous releases, if both MR1 and MR2 were installed, MR2 took higher priority. To restore the MR2 to a higher priority, go to the Configuration tab of the YARN service, search for "alternatives" and set the priority to a higher value than the equivalent value for MR1. (By default in Cloudera Manager 4.1.2, YARN is set to 91, and MR1 is set to 92).
  • Cloudera Manager 4.1.2 supports only version 0.3 of the Cloudera Impala Beta Release. It does not support the earlier beta versions. If you upgrade your Cloudera Manager installation, you must also upgrade Impala to beta version 0.3. If you upgrade Impala to beta version 0.3, you must upgrade Cloudera Manager to 4.1.2.