在solr 7.2 +

Question

我在Windows上使用Solr 7.2.1中的示例设置创建了一个示例SolrCloud实例：

bin/solr start -e cloud
bin/solr.cmd create -c trans -s 2 -rf 2

然后我更新了架构（因为大多数数据来自Postgres和SQL Server：

curl -X POST -H 'Content-type:application/json' --data-binary '{
"add-field":{
     "name":"trans",
     "type":"string",
     "stored":true,
     "indexed":true},

"add-field":{
     "name":"t",
     "type":"pdate",
     "stored":true,
     "indexed":true},

"add-field":{
     "name":"l",
     "type":"pint",
     "stored":true,
     "indexed":true},

}' http://localhost:8983/solr/trans/schema

导致以下架构：

curl http://localhost:8983/solr/trans/schema/fields
{
  "responseHeader":{
    "status":0,
    "QTime":0},
  "fields":[{
      "name":"_root_",
      "type":"string",
      "docValues":false,
      "indexed":true,
      "stored":false},
    {
      "name":"_text_",
      "type":"text_general",
      "multiValued":true,
      "indexed":true,
      "stored":false},
    {
      "name":"_version_",
      "type":"plong",
      "indexed":false,
      "stored":false},
    {
      "name":"id",
      "type":"string",
      "multiValued":false,
      "indexed":true,
      "required":true,
      "stored":true},
    {
      "name":"l",
      "type":"pint",
      "indexed":true,
      "stored":true},
    {
      "name":"t",
      "type":"pdate",
      "indexed":true,
      "stored":true},
    {
      "name":"trans",
      "type":"string",
      "indexed":true,
      "stored":true}]}

在我们的例子中，ID的类型为uuid。如果我改变它我会收到一个错误：

curl -X POST -H 'Content-type:application/json' --data-binary '{
  "replace-field":{
     "name":"id",
     "type":"uuid",
     "stored":true,
 "indexed":true}
}' http://localhost:8983/solr/trans/schema/fields
{
  "responseHeader":{
    "status":500,
    "QTime":48},
  "error":{
    "metadata":[
      "error-class","org.apache.solr.common.SolrException",
      "root-error-class","org.apache.solr.common.SolrException"],
    "msg":"Can't load schema managed-schema: _root_ field must be defined using the exact same fieldType as the uniqueKey field (id) uses: uuid",
...

同时更改_root_和id无效：

curl -X POST -H 'Content-type:application/json' --data-binary '{
  "replace-field":{
     "name":"id",
     "type":"uuid",
     "stored":true,
  },
  "replace-field":{
     "name":"_root_",
     "type":"uuid",
     "stored":true,
      "docValues":false,
      "indexed":true,
      "stored":false}
}
' http://localhost:8983/solr/trans/schema
{
  "responseHeader":{
    "status":500,
    "QTime":50},
  "error":{
    "metadata":[
      "error-class","org.apache.solr.common.SolrException",
      "root-error-class","org.apache.solr.common.SolrException"],
    "msg":"Can't load schema managed-schema: _root_ field must be defined using the exact same fieldType as the uniqueKey field (id) uses: uuid",

如何正确更改solr中id的类型？