Name all Java threads to aid in debugging #23049

[Geddy05]

Name all Java threads to aid in debugging #23049

R: @kennknowles for label java.
R: @Abacn for label io.

[codecov]

Codecov Report

Merging #23380 (c36077a) into master (3c91e7b) will decrease coverage by 0.28%.
The diff coverage is n/a.

❗ Current head c36077a differs from pull request most recent head 7c74e0a. Consider uploading reports for the commit 7c74e0a to get more accurate results

@@            Coverage Diff             @@
##           master   #23380      +/-   ##
==========================================
- Coverage   73.68%   73.40%   -0.29%     
==========================================
  Files         714      718       +4     
  Lines       95220    95652     +432     
==========================================
+ Hits        70161    70211      +50     
- Misses      23762    24130     +368     
- Partials     1297     1311      +14     

Flag	Coverage Δ
go	50.89% <ø> (-0.19%)	⬇️
python	83.16% <ø> (-0.34%)	⬇️

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

Impacted Files	Coverage Δ
sdks/go/pkg/beam/core/runtime/exec/fullvalue.go	77.24% <0.00%> (-6.35%)	⬇️
...s/interactive/dataproc/dataproc_cluster_manager.py	71.72% <0.00%> (-5.70%)	⬇️
sdks/go/pkg/beam/core/runtime/exec/datasource.go	62.00% <0.00%> (-4.30%)	⬇️
sdks/python/apache_beam/internal/pickler.py	92.00% <0.00%> (-3.46%)	⬇️
sdks/python/apache_beam/utils/interactive_utils.py	95.12% <0.00%> (-2.44%)	⬇️
sdks/go/pkg/beam/core/runtime/graphx/coder.go	51.91% <0.00%> (-1.82%)	⬇️
sdks/python/apache_beam/io/source_test_utils.py	88.01% <0.00%> (-1.39%)	⬇️
sdks/go/pkg/beam/core/runtime/exec/coder.go	57.74% <0.00%> (-1.29%)	⬇️
sdks/python/apache_beam/internal/metrics/metric.py	93.00% <0.00%> (-1.00%)	⬇️
sdks/python/apache_beam/io/localfilesystem.py	90.97% <0.00%> (-0.76%)	⬇️
... and 37 more

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R: @kennknowles for label java.
R: @Abacn for label io.

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[Abacn]

Thanks for contributions. I see some files under examples/notebooks/beam-ml looks irrelevant. Is there a rebase issue?

[Geddy05]

Think so. Because i didn't touch these files