Fix restart failed

[SuperYoko]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

Standalone daemon exit after restart, since hosts is registered already.

How do you solve it?

Add existing check.

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

ex. Fixed the bug .....

[critical27]

Good job~

[codecov-commenter]

Codecov Report

Merging #4269 (4ab0bb5) into master (cbf404c) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4269      +/-   ##
==========================================
- Coverage   84.99%   84.96%   -0.03%     
==========================================
  Files        1326     1326              
  Lines      131805   131823      +18     
==========================================
- Hits       112032   112008      -24     
- Misses      19773    19815      +42     

Impacted Files	Coverage Δ
src/clients/meta/MetaClient.cpp	76.52% <ø> (-0.44%)	⬇️
src/clients/meta/MetaClient.h	92.30% <ø> (ø)
src/storage/StorageServer.cpp	80.37% <ø> (ø)
src/storage/query/GetPropProcessor.cpp	74.88% <100.00%> (ø)
src/meta/processors/parts/GetSpaceProcessor.cpp	61.29% <0.00%> (-19.36%)	⬇️
...eta/processors/session/SessionManagerProcessor.cpp	73.54% <0.00%> (-4.52%)	⬇️
src/graph/executor/StorageAccessExecutor.h	60.00% <0.00%> (-4.45%)	⬇️
src/kvstore/wal/WalFileIterator.cpp	64.40% <0.00%> (-4.24%)	⬇️
src/common/expression/ArithmeticExpression.cpp	91.66% <0.00%> (-3.99%)	⬇️
src/common/thread/GenericWorker.h	80.76% <0.00%> (-3.85%)	⬇️
... and 43 more

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