fix: tree infinite loop

[gaius-qi]

Signed-off-by: Gaius [email protected]

Description

• Fix tree infinite loop.
• When there is no CDN, the peer back-to-source immediately.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov-commenter]

Codecov Report

Merging #1271 (2e79ff1) into main (5b5d9a7) will increase coverage by 0.08%.
The diff coverage is 97.77%.

@@            Coverage Diff             @@
##             main    #1271      +/-   ##
==========================================
+ Coverage   45.87%   45.96%   +0.08%     
==========================================
  Files         135      135              
  Lines       11317    11341      +24     
==========================================
+ Hits         5192     5213      +21     
+ Misses       5559     5554       -5     
- Partials      566      574       +8     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	45.96% <97.77%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
scheduler/resource/peer.go	77.83% <96.66%> (+1.16%)	⬆️
scheduler/scheduler/scheduler.go	79.87% <100.00%> (-9.53%)	⬇️
scheduler/service/service.go	86.15% <100.00%> (+0.06%)	⬆️
cdn/supervisor/progress/progress.go	90.62% <0.00%> (-6.25%)	⬇️
client/daemon/peer/peertask_conductor.go	57.21% <0.00%> (-1.05%)	⬇️
...ent/daemon/peer/peertask_piecetask_synchronizer.go	44.84% <0.00%> (+2.57%)	⬆️
client/daemon/peer/peertask_piecetask_poller.go	47.10% <0.00%> (+16.66%)	⬆️