当我尝试通过Gremlin和Gremlin服务器在janusgraph 0.3.0中创建混合索引时，出现“未知外部索引后端：搜索”错误。 Elasticsearch正在运行，我相信配置文件是正确的（我在下面提供了所有内容。
gremlin> mgmt.get('graph.janusgraph-version')
==>0.3.0
gremlin>
当我运行以下命令时...
gremlin> IsCurrentVersion = mgmt.makePropertyKey('is current version').dataType(Boolean.class).cardinality(SINGLE).make();
==>is current version
gremlin> mgmt.buildIndex('iscurrent', Vertex.class).addKey(IsCurrentVersion).buildMixedIndex("search");
我知道...
# Settings with mutability GLOBAL_OFFLINE are centrally managed in
# JanusGraph's storage backend. After starting the database for the first
# time, this file's copy of this setting is ignored. Use JanusGraph's
# Management System to read or modify this value after bootstrapping.
index.search.backend=elasticsearch
# The hostname or comma-separated list of hostnames of index backend
# servers. This is only applicable to some index backends, such as
# elasticsearch and solr.
#
# Default: 127.0.0.1
# Data Type: class java.lang.String[]
# Mutability: MASKABLE
index.search.hostname=127.0.0.1
Gremlin Server启动日志具有...
4060 [main] INFO com.datastax.driver.core.Cluster - New Cassandra host /127.0.0.1:9042 added
4085 [main] INFO org.janusgraph.diskstorage.Backend - Configuring index [search]
4813 [main] INFO org.janusgraph.diskstorage.Backend - Configuring index [backend]
4837 [main] INFO org.janusgraph.diskstorage.Backend - Initiated backend operations thread pool of size 8
4931 [main] INFO org.janusgraph.diskstorage.Backend - Configuring total store cache size: 219574576
Elasticsearch正在运行，如...所示。
curl 'http://localhost:9200/?pretty'
{
"name" : "nfZKXFP",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "6QDueUnoQfmKRwuEG-a3nw",
"version" : {
"number" : "6.0.1",
"build_hash" : "601be4a",
"build_date" : "2017-12-04T09:29:09.525Z",
"build_snapshot" : false,
"lucene_version" : "7.0.1",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}