3

我尝试启动 JanusGraph，但 TinkerPop gremlin 服务器出现问题。我尝试了“release (0.1.1)”和“from source (0.2.0)”两个版本。当我运行/bin/janusgraph.sh start时没有错误，但我无法使用我的应用程序连接到 gremlin。当我启动从 Apache 站点下载的 TinkerPop 版本时，连接没有问题。我认为问题出在配置文件上。Apache版本使用tinkergraph-empty.properties，JanusGraph版本：（janusgraph-cassandra-es-server.properties当然我想用Cassandra）。

使用 Cassandra 配置执行 gremlin-server.sh 的结果不会返回任何错误，但会返回警告：

718  [main] WARN  org.apache.tinkerpop.gremlin.server.GremlinServer  - Graph [graph] configured at [conf/gremlin-server/janusgraph-cassandra-es-server.properties] could not be instantiated and will not be available in Gremlin Server.  GraphFactory message: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:82)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:70)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:104)
    at org.apache.tinkerpop.gremlin.server.GraphManager.lambda$new$0(GraphManager.java:55)
    at java.util.LinkedHashMap$LinkedEntrySet.forEach(LinkedHashMap.java:671)
    at org.apache.tinkerpop.gremlin.server.GraphManager.<init>(GraphManager.java:53)
    at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.<init>(ServerGremlinExecutor.java:83)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:110)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:344)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:78)
    ... 8 more
Caused by: java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager
    at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:69)
    at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:477)
    at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:409)
    at org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1353)
    at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:107)
    at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:87)
    ... 13 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:58)
    ... 18 more
Caused by: org.janusgraph.diskstorage.TemporaryBackendException: Temporary failure in storage backend
    at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:219)
    at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.<init>(CassandraThriftStoreManager.java:198)
    ... 23 more
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused (Connection refused)
    at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
    at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81)
    at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeRawConnection(CTConnectionFactory.java:102)
    at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:66)
    at org.janusgraph.diskstorage.cassandra.thrift.thriftpool.CTConnectionFactory.makeObject(CTConnectionFactory.java:35)
    at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220)
    at org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.getCassandraPartitioner(CassandraThriftStoreManager.java:216)
    ... 24 more
Caused by: java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.thrift.transport.TSocket.open(TSocket.java:180)
    ... 30 more

如何在没有警告的情况下使用 Cassanda 启动 JanusGraph？

4

2 回答 2

2

启动 Cassandra 时出现问题，您可以通过运行以下命令观察到该问题：

bin/nodetool enablethrift

正如@Ashraful Islam 建议的那样。

需要取消注释以下行（我将地址设置为 localhost）conf/cassandra/cassandra-env.sh：

JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=127.0.0.1"
于 2017-09-28T15:16:16.340 回答
0

启用 Cassandra 的 Thrift 服务器

使用以下命令在 cassandra 中启用节俭

nodetool enablethrift
于 2017-09-28T15:00:34.727 回答