[bugfix] change exists cheking for agent vqueue

[kpango]

Signed-off-by: kpango [email protected]

Description:

[bugfix] change exists cheking for agent vqueue

Related Issue:

How Has This Been Tested?:

Environment:

• Go Version: 1.16.4
• Docker Version: 19.03.8
• Kubernetes Version: 1.18.2
• NGT Version: 1.12.3

Types of changes:

• Bug fix [type/bug]
• New feature [type/feature]
• Add tests [type/test]
• Security related changes [type/security]
• Add documents [type/documentation]
• Refactoring [type/refactoring]
• Update dependencies [type/dependency]
• Update benchmarks and performances [type/bench]
• Update CI [type/ci]

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Checklist:

• I have read the CONTRIBUTING document.
• I have checked open Pull Requests for the similar feature or fixes?
• I have added tests and benchmarks to cover my changes.
• I have ensured all new and existing tests passed.
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly.

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 💌 /changelog - replace the PR body by changelog details
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• ⏪ /rebase - rebase master
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[codecov]

Codecov Report

Merging #1256 (0c02c0f) into master (86b1269) will decrease coverage by 0.60%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1256      +/-   ##
==========================================
- Coverage   18.05%   17.44%   -0.61%     
==========================================
  Files         501      498       -3     
  Lines       31483    31139     -344     
==========================================
- Hits         5683     5432     -251     
+ Misses      25507    25430      -77     
+ Partials      293      277      -16     

Impacted Files	Coverage Δ
internal/net/grpc/client.go	0.00% <0.00%> (ø)
pkg/agent/core/ngt/service/ngt.go	0.00% <0.00%> (ø)
pkg/agent/core/ngt/service/vqueue/queue.go	0.00% <0.00%> (ø)
internal/backoff/backoff.go	84.61% <0.00%> (-3.08%)	⬇️
internal/net/option.go
internal/net/net.go
internal/net/dialer.go
internal/worker/worker.go	83.33% <0.00%> (+2.08%)	⬆️

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[kevindiu]

LGTM

[hlts2]

Thank you

[hlts2]

LGTM