The following table lists known issues and any available workarounds for this release.
Before upgrading to HDP 2.6.0 or later, review Service Bulletin SB 925 for critical considerations regarding data in-place upgrades to SLES 12 SP2.
- Go to https://access.teradata.com and log in.
- Search for SB 925.
- Scroll to SB 925 and select the link to read the bulletin.
|systemctl and service should not be used to manage ambari-server and ambari-agent.||Follow current Hortonworks documentation to manage ambari-service and ambari-agent.|
|Customers performing the HDP 2.6 upgrade, following the documentation from Hortonworks, need to follow the instructions in this Service Bulletin before performing the upgrade.||Before upgrading to HDP 2.6, customers must perform the procedures in Service Bulletin: SB 871.
|Ambari may not start automatically after a restart.||Modify the /etc/init.d/ambari-server script by running the following command: sed -i \"s|^SCRIPT_DIR=.*|SCRIPT_DIR=/etc/init.d|g\" /etc/init.d/ambari-server”|
|Intermittent failure to start WebHCat||Intermittent issue. Resolve by manually restarting.|
|Application Timeline Server failed to start during system restart||Intermittent issue. Resolve by manually restarting.|
|During NameNode starts, messages seen during NameNode startup in the Ambari operations log stdout:
2016-09-22 17:56:18,917 - Getting jmx metrics from NN failed. URL: http://selena1.labs.teradata.com:50070/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/resource_management/libraries/functions/jmx.py", line 42, in get_value_from_jmx return data_dict["beans"][property] IndexError: list index out of range
|Patched in Ambari 2.4.1|
|Disable Kerberos hangs on "Unkerberize Cluster' task.||Disabling Kerberos is not recommended.|
|Grafana Dashboard may display no data and a warning message.||Grafana requires at least one data source to be defined by name and a case-sensitive URL. Since Ambari registers all hosts with lowercase hostnames, Grafana may display no data and a warning message. Follow the procedure in Service Bulletin ID: SB 889 to resolve the issue.