Cloudera Docs

Known issues in Cruise Control

Learn about the known issues in Cruise Control, the impact or changes to the functionality, and the workaround.

CDPD-47616: Unable to initiate rebalance, number of valid windows (NumValidWindows) is zero
If a Cruise Control rebalance is initiated with the rebalance_disk parameter and Cruise Control is configured to fetch metrics from Cloudera Manager (Metric Reporter is set to CM metrics reporter), Cruise Control stops collecting metrics from the partitions that are moved. This is because Cloudera Manager does not collect metrics from moved partitions due to an issue in Kafka (KAFKA-10320).

If the metrics are not available, the partition is considered invalid by Cruise Control. This results in Cruise Control blocking rebalance operations and proposal generation.

Configure Cruise Control to use to use the Cruise Control metrics reporter (default). This issue is not present if this metric reporter is used.
  1. In Cloudera Manager, select the Cruise Control service.
  2. Go to Configuration.
  3. Find the Metric Reporter property.
  4. Select the Cruise Control metrics reporter option.
  5. Restart the Cruise Control service.
OPSAPS-68148: Cruise Control rack aware goal upgrade handler
The goal sets in Cruise Control, which include the default, supported, hard, self-healing and anomaly detection goals, might be overridden to their default value after a cluster upgrade if the goals have been customized.
Create a copy from the values of the goal lists before upgrading your cluster, and add the copied values to the goal lists after upgrading the cluster. Furthermore, you must rename any mentioning of com.linkedin.kafka.cruisecontrol.analyzer.goals.RackAwareGoal to com.linkedin.kafka.cruisecontrol.analyzer.goals.RackAwareDistributionGoal as Cruise Control will not be able to start otherwise.
OPSAPS-66432: Cruise Control does not start with Python 3
When installing Cruise Control with Python 3 as the default Python version, Cruise Control will fail to start with the following error due to Python 2 compatibility in the CSD script of Cruise Control:
File "/var/run/cloudera-scm-agent/process/1546350171-cruise_control-CRUISE_CONTROL_SERVER/scripts/capacity.py", line 185, in create_capacities_json
Change the /user/bin/python symbolic link to point to python2.
OPSAPS-69978: Cruise Control capacity.py script fails on Python 3

Cruise Control might fail to start on Python 3 when capacity information is queried during the startup process. This is caused by a breaking change between Python 2 and 3.

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