无法连接到Elasticsearch（通过Curl） [英] Can't Connect to Elasticsearch (through Curl)

问题描述

我最近安装了Elasticsearch，开始的头几天一切运行良好，但是今天不知何故

I've recently installed Elasticsearch and everything was working well for the first few days, but somehow today it stopped working

当我启动该服务时，它声称很好...

When I start the service, it claims to be fine...

sudo /etc/init.d/elasticsearch start
* Starting Elasticsearch Server
...done.

但是随后我得到

curl -GET http ：//127.0.0.1：9200

卷曲：（7）无法连接到主机

查看elasticsearch日志：

Looking at the elasticsearch logs:

[WARN ][bootstrap                ] jvm uses the client vm, make sure to run `java` with the server vm for best performance by adding `-server` to the command line

$中添加`-server`来确保在服务器虚拟机上运行Java以获得最佳性能。 b $ b

好像有关于Java VM的警告；那可能是问题吗？我还应该尝试/看看什么？

Looks like there is a warning regarding the Java VM; could that be the problem? What else should I try/look at?

推荐答案

1）检查9200端口的状态，在Linux中使用 lsof 命令。

1) Check what's the status of your port 9200, with lsof command in linux.

对于我来说，以下是的结果Elasticsearch 已启动。

In my case following is the result when elasticsearch is started.

prayag@prayag:~$ sudo lsof -i TCP | grep 9200 
chrome  2639 praayg   84u  IPv4 116310      0t0  TCP prayag.local:58989->10.0.4.70:9200 (ESTABLISHED)
chrome  2639 prayag   99u  IPv4 116313      0t0  TCP prayag.local:58990->10.0.4.70:9200 (ESTABLISHED)
java    7634 prayag  141u  IPv6 130960      0t0  TCP *:9200 (LISTEN)

elasticsearch 对我不是服务，否则要找到正在运行的端口；

elasticsearch is not a service to me, otherwise to find the port es is running; on I could have checked,

$ sudo lsof -iTCP -sTCP:LISTEN | grep elasticsearch

2）检查elasticsearch端点

$ curl -IGET http://localhost:9200
HTTP/1.1 200 OK
content-type: application/json; charset=UTF-8
content-length: 327

• -IGET 等效于-head ，仅返回http响应标头。

  • -IGET is equivalent to --head that returns http response headers only.

    响应 200 表示Elasticsearch端点响应正确。

    response 200 means elasticsearch endpoint is responding properly.

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