带Solr的JanusGraph

Question

我在连接到Solr的JanusGraph时遇到了问题:我有以下问题：

application.java
    public static void main(String args[]) {
        JanusGraph g = JanusGraphFactory.open("/path/to/file/janusgraph-solr.properties");
        GraphOfTheGodsFactory.load(g);
        g.close();
    }

janushgraph-solr.properties

# Change to the directory where JanusGraph was extracted.  Later commands
# use relative paths to the Solr config files shipped with the JanusGraph
# distribution.
cd $JANUSGRAPH_HOME

# The name must be URL safe and should contain one dot/full-stop
# character. The part of the name after the dot must not conflict with
# any of JanusGraph's internal CF names.  Starting the part after the dot
# "solr" will avoid a conflict with JanusGraph's internal CF names.
CORE_NAME=testt
# Where to upload collection configuration and send CoreAdmin requests.
SOLR_HOST=localhost:8983

# The value of index.[X].solr.http-urls in JanusGraph's config file
# should match $SOLR_HOST and $CORE_NAME.  For example, given the
# $CORE_NAME and $SOLR_HOST values above, JanusGraph's config file would
# contain (assuming "search" is the desired index alias):
#
 index.search.solr.http-urls=http://localhost:8983/solr/testt
#
# The stock JanusGraph config file conf/janusgraph-cassandra-solr.properties
# ships with this http-urls value.

storage.backend=cassandrathrift

GraphOfTheGods文件：https://github.com/JanusGraph/janusgraph/blob/master/janusgraph-core/src/main/java/org/janusgraph/example/GraphOfTheGodsFactory.java

我得到以下错误：

Exception in thread "main" java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager

Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend

Caused by: java.net.ConnectException: Connection refused (Connection refused)

如何摆脱storage.backend=cassandrathrift并使用solr作为后端？如文件所示，用solr代替"cassandrathrift“对我来说是失败的。这将导致找不到solr类。如能提供任何帮助，将不胜感激。

Answer 1

在cassandra上启用节俭服务器

nodetool enablethrift

Answer 2

将存储后端配置更改为

storage.backend=cassandrathrift

至：

storage.backend=cql