Fixes loading from streams when no chunk in some workers.

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[codecov-io]

Codecov Report

Merging #159 (bb83dcf) into main (02f7a47) will decrease coverage by 12.67%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #159       +/-   ##
===========================================
- Coverage   76.44%   63.77%   -12.68%     
===========================================
  Files          53       53               
  Lines        3864     3892       +28     
===========================================
- Hits         2954     2482      -472     
- Misses        910     1410      +500     

Impacted Files	Coverage Δ
src/server/services/meta_service.cc	29.76% <0.00%> (-50.97%)	⬇️
src/server/server/vineyard_server.h	60.00% <0.00%> (-40.00%)	⬇️
src/server/server/vineyard_server.cc	41.75% <0.00%> (-32.89%)	⬇️
src/server/services/meta_service.h	47.42% <0.00%> (-28.16%)	⬇️
src/server/async/socket_server.cc	64.68% <0.00%> (-18.52%)	⬇️
src/server/memory/stream_store.cc	49.56% <0.00%> (-16.23%)	⬇️
src/server/util/meta_tree.cc	60.65% <0.00%> (-15.88%)	⬇️
src/common/util/protocols.cc	77.41% <0.00%> (-14.05%)	⬇️
src/server/util/etcd_launcher.cc	64.76% <0.00%> (-13.12%)	⬇️
src/server/services/etcd_meta_service.h	80.00% <0.00%> (-12.00%)	⬇️
... and 3 more