如何从java连接到正在运行的bigtable模拟器 [英] How to connect to a running bigtable emulator from java

问题描述

我正在尝试使用gcloud beta模拟器中的bigtable模拟器。
我启动模拟器，获取主机名（localhost）和端口（在本例中为8885）

I am trying to use the bigtable emulator from gcloud beta emulators. I launch the emulator, grab the hostname (localhost) and port (in this instance 8885)

gcloud beta模拟器bigtable start

gcloud beta emulators bigtable start

执行：/ usr / local / Caskroom / google-cloud-sdk / latest / google-cloud-sdk / platform / bigtable-emulator / cbtemulator --host = localhost --port = 8885

Executing: /usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/platform/bigtable-emulator/cbtemulator --host=localhost --port=8885

我正在尝试从java测试客户端连接到模拟器，
这是我的意思提供：

I am trying to connect to the emulator from a java test client, here is what I provide:

Configuration conf = BigtableConfiguration.configure(projectId, instanceId);

if(!Strings.isNullOrEmpty(host)){
    conf.set(BigtableOptionsFactory.BIGTABLE_HOST_KEY, host);
    conf.set(BigtableOptionsFactory.BIGTABLE_PORT_KEY, Integer.toString(port));
}
connection = BigtableConfiguration.connect(configuration);
try (Table table = connection.getTable("tName")){
    table.put(<Put instance>);
} 

当我执行测试代码时，我得到：

When I execute the test code I get:

16:36:37.369 [bigtable-batch-pool-1] INFO com.google.cloud.bigtable.grpc.async.AbstractRetryingRpcListener - Retrying failed call. Failure #1, got: Status{code=UNAVAILABLE, description=null, cause=java.net.ConnectException: Connection refused: localhost/0:0:0:0:0:0:0:1:8885}
java.net.ConnectException: Connection refused: localhost/0:0:0:0:0:0:0:1:8885

我正在使用该库： com.google.cloud.bigtable：bigtable-hbase-1.2：0.9.1

我知道我做错了什么？

谢谢！

推荐答案

您需要设置一个额外的配置属性：

You need one additional config property to be set:

conf.set(BigtableOptionsFactory.BIGTABLE_USE_PLAINTEXT_NEGOTIATION, true);

此外，从日志消息中看起来它正在尝试连接到IPv6地址，我不知道我认为会奏效。仔细检查 host 是否是有效的IPv4地址。

Also, from the log message it looks like it's trying to connect to an IPv6 address, which I don't think will work. Double-check that host is a valid IPv4 address.

java客户端将使这更容易做到不久的将来。

The java client will make this easier to do in the near future.

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