Make sure reconnect behaves as expected

[sighingnow]

What do these changes do?

as titled.

Related issue number

N/A

[siyuan0322]

Nice catch!

[siyuan0322]

This else seems redundant

[codecov-commenter]

Codecov Report

Merging #2297 (9046c15) into main (1e9fff4) will decrease coverage by 1.20%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2297      +/-   ##
==========================================
- Coverage   73.00%   71.80%   -1.21%     
==========================================
  Files          89       89              
  Lines        9922     9924       +2     
==========================================
- Hits         7244     7126     -118     
- Misses       2678     2798     +120     

Impacted Files	Coverage Δ
python/graphscope/client/rpc.py	81.67% <ø> (-3.06%)	⬇️
python/graphscope/client/session.py	75.18% <100.00%> (-1.43%)	⬇️
python/graphscope/tests/unittest/test_java_app.py	53.01% <0.00%> (-46.99%)	⬇️
python/graphscope/analytical/app/java_app.py	24.36% <0.00%> (-27.92%)	⬇️
python/graphscope/framework/graph_utils.py	80.15% <0.00%> (-2.39%)	⬇️
python/graphscope/framework/app.py	90.32% <0.00%> (-1.39%)	⬇️
python/graphscope/framework/utils.py	67.25% <0.00%> (-1.00%)	⬇️
python/graphscope/framework/graph_schema.py	64.61% <0.00%> (-0.23%)	⬇️

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