命令和API之间有什么区别来创建一个新的核心？(What are the differences between the command and the API to create a new core?)

 通过运行以下命令我可以创建一个新的内核。 
 
$ ./bin/solr create -c newcore

Setup new core instance directory:
/Users/myname/Documents/solr/solr-5.2.1/server/solr/newcore

Creating new core 'newcore' using command:
http://localhost:8983/solr/admin/cores?action=CREATE&name=newcore&instanceDir=newcore

{
  "responseHeader":{
    "status":0,
    "QTime":916},
  "core":"newcore"}
 
 但是，我无法通过消息所述的API创建新的内核。 
 
$ curl -X GET 'http://localhost:8983/solr/admin/cores?action=CREATE&name=newcore2&instanceDir=newcore2'
<?xml version="1.0" encoding="UTF-8"?>
<response>
<lst name="responseHeader"><int name="status">400</int><int name="QTime">361</int></lst><lst name="error"><str name="msg">Error CREATEing SolrCore 'newcore2': Unable to create core [newcore2] Caused by: Can't find resource 'solrconfig.xml' in classpath or '/Users/myname/Documents/solr/solr-5.2.1/server/solr/newcore2/conf'</str><int name="code">400</int></lst>
</response>
 
 这两种创建核心的方式有什么不同？ 我明白为什么会发生这种情况的错误。 命令的过程与API的过程不一样吗？ 我正在使用solr-5.2.1。 

I could create a new core by running the following command.
 
$ ./bin/solr create -c newcore

Setup new core instance directory:
/Users/myname/Documents/solr/solr-5.2.1/server/solr/newcore

Creating new core 'newcore' using command:
http://localhost:8983/solr/admin/cores?action=CREATE&name=newcore&instanceDir=newcore

{
  "responseHeader":{
    "status":0,
    "QTime":916},
  "core":"newcore"}
 
However, I couldn't create a new core through the API that the message said.
 
$ curl -X GET 'http://localhost:8983/solr/admin/cores?action=CREATE&name=newcore2&instanceDir=newcore2'
<?xml version="1.0" encoding="UTF-8"?>
<response>
<lst name="responseHeader"><int name="status">400</int><int name="QTime">361</int></lst><lst name="error"><str name="msg">Error CREATEing SolrCore 'newcore2': Unable to create core [newcore2] Caused by: Can't find resource 'solrconfig.xml' in classpath or '/Users/myname/Documents/solr/solr-5.2.1/server/solr/newcore2/conf'</str><int name="code">400</int></lst>
</response>
 
What are the differences between these two ways to create a core? I understand why the error occurs this case. Is the process of the command not the same as the process of the API? I'm using solr-5.2.1.

原文：https://stackoverflow.com/questions/42434679