### Motivation This is based on PR #2614, please check and review starting from the 3rd commit It mainly want to PulsarOffsetBackingStore.
### Modifications add PulsarOffsetBackingStore and test for it. ### Result ut pass [ Full content available at: https://github.com/apache/incubator-pulsar/pull/2627 ] This message was relayed via gitbox.apache.org for [email protected]
