The following table lists known issues and any available workarounds for this release.
Important:
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.
- Select TAYS PORTAL.
- Under Knowledge Search, search for SB 925.
- Select the SB 925 - KAC145542 link.
| Issue | Description |
|---|---|
| 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 ID: 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"][0][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.
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