Greedyu opened a new pull request, #4113:
URL: https://github.com/apache/incubator-inlong/pull/4113

   [INLONG-4112][Agent] mysql binlog supports collection from a specified start 
   #4112 
   
   ### Motivation
   1. mysql binlog supports collection from a specified start
   2. Fix BinlogReader init() bug
   
   ### Modifications
   Refer to flink to specify the location reading method。The core principle is 
to modify the OffsetBackingStore object when initializing the 
OffsetStorageWriter class in the configure() of the FlinkOffsetBackingStore 
class. When specifying the location, the "offset.storage" configuration here 
directly uses FlinkOffsetBackingStore.class.getCanonicalName(), and specifies 
FlinkOffsetBackingStore.OFFSET_STATE_VALUE, "snapshot.mode" and other 
parameters according to the flink configuration
   
   ### Verifying this change
   
![wecom-temp-fa95a84d19dec9deb7f3d42c6ee736fc](https://user-images.githubusercontent.com/20356765/167252726-7902c3bb-5a6f-47d9-9f6b-e1724a959734.png)
   


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