为什么 Elasticsearch2 Adapter 在尝试连接到 elasticsearch 时给出 'cannot connect to any node'

Question

我正在使用 elasticsearch 版本 6.1。1.I 已经下载了 calcite 框架项目并按照教程在我的机器上构建它（https://calcite.apache.org/docs/tutorial.html) and when i tried to connect to elasticsearch using the Elasticsearch2adaptor of calcite as given here(https://calcite.apache.org/docs/elasticsearch_adapter.html).i 出现以下错误 错误：

*E:\calcite\elasticsearch2>sqlline
sqlline version 1.3.0
sqlline> !connect jdbc:calcite:model=target/test-classes/mymodel.json admin admin
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Connecting to jdbc:calcite:model=target/test-classes/mymodel.json
java.lang.RuntimeException: Error instantiating JsonCustomSchema(name=elasticsearch)
at org.apache.calcite.model.ModelHandler.visit(ModelHandler.java:275)
at org.apache.calcite.model.JsonCustomSchema.accept(JsonCustomSchema.java:45)
at org.apache.calcite.model.ModelHandler.visit(ModelHandler.java:196)
at org.apache.calcite.model.ModelHandler.<init>(ModelHandler.java:88)
at org.apache.calcite.jdbc.Driver.onConnectionInit(Driver.java:104)
at org.apache.calcite.avatica.UnregisteredDriver.connect(UnregisteredDriver.java:139)
at sqlline.DatabaseConnection.connect(DatabaseConnection.java:156)
at sqlline.DatabaseConnection.getConnection(DatabaseConnection.java:204)
at sqlline.Commands.connect(Commands.java:1095)
at sqlline.Commands.connect(Commands.java:1001)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sqlline.ReflectiveCommandHandler.execute(ReflectiveCommandHandler.java:38)
at sqlline.SqlLine.dispatch(SqlLine.java:791)
at sqlline.SqlLine.begin(SqlLine.java:668)
at sqlline.SqlLine.start(SqlLine.java:373)
at sqlline.SqlLine.main(SqlLine.java:265)
Caused by: java.lang.RuntimeException: ***Cannot connect to any elasticsearch nodes***
at org.apache.calcite.adapter.elasticsearch2.Elasticsearch2Schema.open(Elasticsearch2Schema.java:123)
at org.apache.calcite.adapter.elasticsearch2.Elasticsearch2Schema.<init>(Elasticsearch2Schema.java:73)
at org.apache.calcite.adapter.elasticsearch2.Elasticsearch2SchemaFactory.create(Elasticsearch2SchemaFactory.java:56)
at org.apache.calcite.model.ModelHandler.visit(ModelHandler.java:270)
... 18 more*

这是 mymodel.json 文件：

{
    "version":"1.0",
    "defaultSchema":"elasticsearch",
    "schemas": [
    {
        "type" : "custom",
        "name" : "elasticsearch",
        "factory" : "org.apache.calcite.adapter.elasticsearch2.Elasticsearch2SchemaFactory",
        "operand" : {
            "coordinates" : "{'127.0.0.1':9300}",
            "userConfig" : "{'bulk.flush.max.actions':10 , 'bulk.flush.max.size.mb': 1}",
            "index" : "movies"
        }
    }
    ]
}

Answer 1

您提到的适配器与 Elasticsearch 不兼容6.x

引用自适配器的网页

This adapter is targeted for Elasticsearch 2.x. To use Calcite with Elasticsearch 5.x+ you can use the factory of the adapter targeted for Elasticsearch 5.x:

您可以将 Elasticsearch 降级到版本 2.x 或 5.x，它应该可以工作

为什么 Elasticsearch2 Adapter 在尝试连接到 elasticsearch 时给出 'cannot connect to any node'

Why does Elasticsearch2 Adapter gives a 'cannot connect to any node' while trying to connect to elasticsearch

elasticsearch

apache-calcite