István Fajth created HADOOP-18979:
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Summary: Create curator client the same way possibly with the same
code for all services
Key: HADOOP-18979
URL: https://issues.apache.org/jira/browse/HADOOP-18979
Project: Hadoop Common
Issue Type: Improvement
Reporter: István Fajth
Currently ZKSignerSecretProvider and ZKDelegationTokenSecretManager classes are
using the same ZookeeperClient class to create their respective Zookeeper
connection via a Curator client.
In order to have a standardized way of creating Zookeeper connections, we have
two areas to fix:
- YARN and its Curator instantiation
- HDFS ZKFC, which currently uses a Zookeeper client directly, so it should
also be migrated to Curator if we want to utilize the common instantiation.
The problem that we would solve is that currently we have 3 places where we
create ZK connections, and all of them has its own things, along with some
duplications.
We also have the HadoopZookeeperFactory, that I think we do not need. The only
thing that is different for this is how we set up SASL permission provider for
the connection. I believe that can also be unified, with that the whole
Zookeeper connection creation can be pushed down to the recently added code
that handles this for ZKDelegationTokenSecretManager and ZKSignerSecretProvider.
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