ContentLength=xxx with Body length 0 when request to pd

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

run with-real-tikv

2. What did you expect to see? (Required)

3. What did you see instead (Required)

=== NAME  TestLoadRemote

    testkit.go:224: 

        	Error Trace:	testkit/testkit.go:224

        	            				testkit/testkit.go:158

        	            				testkit/testkit.go:149

        	            				tests/realtikvtest/importintotest/import_into_test.go:578

        	Error:      	Received unexpected error:

        	            	Post "http://127.0.0.1:2379/pd/api/v1/config/region-label/rule": http: ContentLength=274 with Body length 0

        	            	github.com/pingcap/tidb/disttask/framework/handle.WaitGlobalTask

        	            		disttask/framework/handle/handle.go:89

        	            	github.com/pingcap/tidb/disttask/importinto.(*DistImporter).ImportTask.func1

        	            		disttask/importinto/job.go:109

        	            	golang.org/x/sync/errgroup.(*Group).Go.func1

        	            		external/org_golang_x_sync/errgroup/errgroup.go:75

        	            	runtime.goexit

        	            		src/runtime/asm_amd64.s:1598

        	Test:       	TestLoadRemote

        	Messages:   	sql:IMPORT INTO load_charset.gbk FROM 'gs://test-load/utf8mb4.csv?endpoint=http://127.0.0.1:4443/storage/v1/'

        	            			WITH character_set='utf8mb4', args:[]

=== NAME  TestLoadRemote/TestGBK

https://do.pingcap.net/jenkins/blue/organizations/jenkins/pingcap%2Ftidb%2Fghpr_check2/detail/ghpr_check2/22937/pipeline

4. What is your TiDB version? (Required)

[D3Hunter]

fixed in #48307