[type:bug] fix zookeeper sync error.

[yunlongn]

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4906 (7ae5c62) into master (e3cf9ed) will increase coverage by 0.00%.
Report is 1 commits behind head on master.
The diff coverage is 60.00%.

@@            Coverage Diff            @@
##             master    #4906   +/-   ##
=========================================
  Coverage     64.04%   64.04%           
  Complexity     8312     8312           
=========================================
  Files          1180     1180           
  Lines         34865    34867    +2     
  Branches       3115     3115           
=========================================
+ Hits          22328    22330    +2     
  Misses        10763    10763           
  Partials       1774     1774           

Files Changed	Coverage Δ
.../sync/data/zookeeper/ZookeeperSyncDataService.java	54.74% <60.00%> (+0.51%)	⬆️

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