Considerations and workarounds
Maintenance windows now process devices in batches of 200
(ZEN-28886) The zenactiond.conf file now has a setting for batches to process devices for maintenance windows in groups of 200. Previously, batching was not enabled. To change the default batching, edit the following line in the zenactiond.conf file in Control Center:
All timestamps now use local time zone
(ZEN-28883) Previous releases used a mixture of timestamps throughout Zenoss Core (UTC and local time zone). For ease and consistency, all timestamps now use the local time zone.
Removing support for Internet Explorer 10
(ZEN-27386) Starting with Zenoss Core 6.0.0, Internet Explorer 10 is no longer a supported browser.
NFS client 4.1 is not supported
A file locking defect might exist in NFS 4.1 with RHEL/CentOS 7.4, which could cause zeneventserver to crash and other DFS-related problems. For more information, refer to topic "Configuring NFS 4.0" in the Control Center installation guide or upgrade guide, or knowledge base article Potential Issues Running With RHEL 7.4 Or CentOS 7.4.
CentralQuery maximum memory allocation pool
(ZEN-15907) The size of the CentralQuery maximum memory allocation pool is set by the RAMCommitment variable in the CentralQuery service definition. The default value is 1024MB. Do not change the value to anything less than 1024MB.