У меня есть экземпляр EC2, который может подключиться к gremlin с помощью Gremlin Console или путем извлечения этого репозитория и выполнения команды maven.
Однако при использовании рекомендованной версии4 зависимость подписи:
dependencies {
compile(
...
// neptune sigv4
[group: "com.amazonaws", name:"aws-java-sdk-core", version: "1.11.307"],
[group: "com.amazonaws", name:"amazon-neptune-sigv4-signer", version: "1.0"],
[group: "com.amazonaws", name:"amazon-neptune-gremlin-java-sigv4", version: "1.0"],
...
)
}
В очень похожей программе hello world:
package com.test.neptune;
import org.apache.tinkerpop.gremlin.driver.Client;
import org.apache.tinkerpop.gremlin.driver.Cluster;
import org.apache.tinkerpop.gremlin.driver.Result;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import org.apache.tinkerpop.gremlin.driver.SigV4WebSocketChannelizer;
import org.neo4j.cypher.internal.frontend.v2_3.repeat;
public class NeptuneExampleCopy {
private static final String NEPTUNE_ENDPOINT = "my.endpoint.url";
private static final int NEPTUNE_PORT = 0;
public static void main(String[] args) {
// connect to the neptune cluster
final Cluster cluster = Cluster.build()
.addContactPoint(NEPTUNE_ENDPOINT)
.port(NEPTUNE_PORT)
.channelizer(SigV4WebSocketChannelizer.class)
.create();
// run a traversal, print the results
final Client client = cluster.connect();
final ResultSet rs = client.submit("g.V().count()");
for (Result r : rs) {
System.out.println(r);
}
// close the cluster
cluster.close();
}
}
Gradle выдает следующее исключение:
Apr 25, 2019 5:24:21 PM io.netty.channel.ChannelInitializer exceptionCaught
WARNING: Failed to initialize a channel. Closing: [id: 0xd894eb28]
com.amazon.neptune.gremlin.driver.exception.SigV4PropertiesNotFoundException: Unable to load SigV4 properties from any of the providers
at com.amazon.neptune.gremlin.driver.sigv4.ChainedSigV4PropertiesProvider.getSigV4Properties(ChainedSigV4PropertiesProvider.java:74)
at com.amazon.neptune.gremlin.driver.sigv4.AwsSigV4ClientHandshaker.loadProperties(AwsSigV4ClientHandshaker.java:102)
at com.amazon.neptune.gremlin.driver.sigv4.AwsSigV4ClientHandshaker.<init>(AwsSigV4ClientHandshaker.java:64)
at org.apache.tinkerpop.gremlin.driver.SigV4WebSocketChannelizer.createHandler(SigV4WebSocketChannelizer.java:210)
at org.apache.tinkerpop.gremlin.driver.SigV4WebSocketChannelizer.configure(SigV4WebSocketChannelizer.java:176)
at org.apache.tinkerpop.gremlin.driver.Channelizer$AbstractChannelizer.initChannel(Channelizer.java:140)
at org.apache.tinkerpop.gremlin.driver.Channelizer$AbstractChannelizer.initChannel(Channelizer.java:92)
at io.netty.channel.ChannelInitializer.initChannel(ChannelInitializer.java:113)
at io.netty.channel.ChannelInitializer.handlerAdded(ChannelInitializer.java:105)
at io.netty.channel.DefaultChannelPipeline.callHandlerAdded0(DefaultChannelPipeline.java:617)
at io.netty.channel.DefaultChannelPipeline.access$000(DefaultChannelPipeline.java:46)
at io.netty.channel.DefaultChannelPipeline$PendingHandlerAddedTask.execute(DefaultChannelPipeline.java:1467)
at io.netty.channel.DefaultChannelPipeline.callHandlerAddedForAllHandlers(DefaultChannelPipeline.java:1141)
at io.netty.channel.DefaultChannelPipeline.invokeHandlerAddedIfNeeded(DefaultChannelPipeline.java:666)
at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:510)
at io.netty.channel.AbstractChannel$AbstractUnsafe.access$200(AbstractChannel.java:423)
at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:482)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463)
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886)
at java.lang.Thread.run(Thread.java:748)
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: java.util.concurrent.TimeoutException: Timed out while waiting for an available host - check the client configuration and connectivity to the server if this message persists
at org.apache.tinkerpop.gremlin.driver.Client.submit(Client.java:214)
at org.apache.tinkerpop.gremlin.driver.Client.submit(Client.java:198)
at com.test.neptune.NeptuneExampleCopy.main(NeptuneExampleCopy.java:25)
Caused by: java.lang.RuntimeException: java.util.concurrent.TimeoutException: Timed out while waiting for an available host - check the client configuration and connectivity to the server if this message persists
at org.apache.tinkerpop.gremlin.driver.Client.submitAsync(Client.java:310)
at org.apache.tinkerpop.gremlin.driver.Client.submitAsync(Client.java:242)
at org.apache.tinkerpop.gremlin.driver.Client.submit(Client.java:212)
... 2 more
Caused by: java.util.concurrent.TimeoutException: Timed out while waiting for an available host - check the client configuration and connectivity to the server if this message persists
at org.apache.tinkerpop.gremlin.driver.Client$ClusteredClient.chooseConnection(Client.java:499)
at org.apache.tinkerpop.gremlin.driver.Client.submitAsync(Client.java:305)
... 4 more
Apr 25, 2019 5:24:22 PM io.netty.channel.ChannelInitializer exceptionCaught
WARNING: Failed to initialize a channel. Closing: [id: 0xc3ff34e0]
com.amazon.neptune.gremlin.driver.exception.SigV4PropertiesNotFoundException: Unable to load SigV4 properties from any of the providers
at com.amazon.neptune.gremlin.driver.sigv4.ChainedSigV4PropertiesProvider.getSigV4Properties(ChainedSigV4PropertiesProvider.java:74)
at com.amazon.neptune.gremlin.driver.sigv4.AwsSigV4ClientHandshaker.loadProperties(AwsSigV4ClientHandshaker.java:102)
at com.amazon.neptune.gremlin.driver.sigv4.AwsSigV4ClientHandshaker.<init>(AwsSigV4ClientHandshaker.java:64)
at org.apache.tinkerpop.gremlin.driver.SigV4WebSocketChannelizer.createHandler(SigV4WebSocketChannelizer.java:210)
at org.apache.tinkerpop.gremlin.driver.SigV4WebSocketChannelizer.configure(SigV4WebSocketChannelizer.java:176)
at org.apache.tinkerpop.gremlin.driver.Channelizer$AbstractChannelizer.initChannel(Channelizer.java:140)
at org.apache.tinkerpop.gremlin.driver.Channelizer$AbstractChannelizer.initChannel(Channelizer.java:92)
at io.netty.channel.ChannelInitializer.initChannel(ChannelInitializer.java:113)
Как этот код может бытьфиксированный?Есть ли лучшая зависимость подписи для Версии 4?