prepare jvm pid failed

[LuckyHawk]

Issue Description

it doesn't work when I try to prepare jvm process in chaosblade

Describe what happened (or what feature you want)

$ ./blade prepare jvm --pid 66812
{"code":63064,"success":false,"error":"http://127.0.0.1:41899/sandbox/chaosblade/module/http/sandbox-module-mgr/active?1=1\u0026ids=chaosblade: http cmd failed, err: Get "http://127.0.0.1:41899/sandbox/chaosblade/module/http/sandbox-module-mgr/active?1=1\u0026ids=chaosblade\": dial tcp 127.0.0.1:41899: connect: connection refused","result":"6445f0af61b9d334"}

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how can I do to resolve this question?

How to reproduce it (as minimally and precisely as possible)

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