[
https://issues.apache.org/jira/browse/KNOX-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16173283#comment-16173283
]
Rick Kellogg commented on KNOX-1041:
------------------------------------
For both HBase and Kafka, the REST Server is not registered within Zookeeper.
Instead we look up the location of the HBase RegionServer (/hbase-unsecure) or
Kafka (/broker/ids). Using the host information found a light weight ping
style operation is done to determine if the REST Server is operational.
In the future, it would be preferable to read live host information directly
from Zookeeper. Enhancement requests have been made to both projects. See
links above.
> High Availability Support For Apache SOLR, HBase & Kafka
> --------------------------------------------------------
>
> Key: KNOX-1041
> URL: https://issues.apache.org/jira/browse/KNOX-1041
> Project: Apache Knox
> Issue Type: New Feature
> Components: Server
> Affects Versions: 0.12.0, 0.13.0
> Reporter: Rick Kellogg
> Assignee: Rick Kellogg
> Fix For: 0.14.0
>
> Attachments: KNOX-1041.patch
>
>
> Provide high-availability/fail-over between Knox and SOLR/HBase/Kafka using
> the existing DefaultHaDispatch mechanism and a customized URLManager
> implementation with knowledge of active hosts in Zookeeper.
> When SOLR Cloud is used the active hosts are stored in Zookeeper under the
> /live_nodes path. The attached custom URLManager implementation queries
> Zookeeper for the active hosts upon startup. In the event of fail-over, it
> updates the internal list of hosts.
> The HS2ZookeeperURLManager implementation used to provide similar
> functionality for Hive was used as a starting point.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
