The HCP 1.6.0 release has the following known issue:
During HCP installation, some versions of Zeppelin might fail to install. If the Zeppelin notebooks are not installed, import the Apache Zeppelin Notebook manually.
The Kerberization process might lock solr directories. If this occurs you will see the following message in the logs:
is locked (lockType=hdfs). Throwing exception.and you will not see Solr alerts in the Alerts UI. If this issue occurs, remove the
write.lockfile located at
/solr/bro/core_node1/data-index/write.lockor, in Ambari, navigate to Solr > config > Advanced solr-hdfs and check the Delete write.lock files on HDFS checkbox. After you have deleted the
write.lockfile, restart Solr.