2

设置 JanusGraph 我在控制台中注意到以下内容：

09:04:12,175  INFO ReflectiveConfigOptionLoader:173 - Loaded and initialized config classes: 10 OK out of 12 attempts in PT0.023S
09:04:12,230  INFO Reflections:224 - Reflections took 28 ms to scan 1 urls, producing 2 keys and 2 values 
09:04:12,291  WARN GraphDatabaseConfiguration:1445 - Local setting index.search.index-name=entity (Type: GLOBAL_OFFLINE) is overridden by globally managed value (janusgraph).  Use the ManagementSystem interface instead of the local configuration to control this setting.
09:04:12,294  WARN GraphDatabaseConfiguration:1445 - Local setting index.search.backend=solr (Type: GLOBAL_OFFLINE) is overridden by globally managed value (elasticsearch).  Use the ManagementSystem interface instead of the local configuration to control this setting.
09:04:12,300  INFO CassandraThriftStoreManager:628 - Closed Thrift connection pooler.

然后我看到以下内容：

Exception in thread "main" java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.es.ElasticSearchIndex

如何停止使用 elasticsearch 并切换到 Solr？

我的属性文件如下：

index.search.backend=solr
index.search.directory=/path/to/directory/for/solr/index/something
index.search.index-name=something
index.search.solr.mode=http
index.search.solr.http-urls=http://127.0.0.1:8983/solr
storage.backend=cassandrathrift

storage.hostname=127.0.0.1
cache.db-cache = true

cache.db-cache-clean-wait = 20

cache.db-cache-time = 180000

cache.db-cache-size = 0.25
4

1 回答 1

4

这个问题的答案与 Titan 的答案基本相同。JanusGraph 是从 Titan 分叉出来的。

您可能正在尝试连接到之前配置为使用 Elasticsearch 的现有图。默认情况下，键空间命名为janusgraph.

1）您可以通过更新连接到不同的键空间conf/janusgraph-cassandra.properties

gremlin.graph=org.janusgraph.core.JanusGraphFactory
storage.backend=cassandrathrift
storage.hostname=127.0.0.1
storage.cassandra.keyspace=mygraph

2）您可以删除现有的键空间。如果您bin/janusgraph.sh start从快速入门方向使用（启动单节点 Cassandra 和单节点 Elasticsearch），

bin/janusgraph.sh clean

或者，如果您有独立的 Cassandra 安装：

$CASSANDRA_HOME/bin/cqlsh -e 'drop keyspace if exists janusgraph'

Then you would be able to connect with the default conf/janusgraph-cassandra.properties.

于 2017-10-04T17:55:48.477 回答