我elasticsearch的Java中的简单代码:为什么我的elasticsearch无法在JAVA API中构建transportclient?
public class TryElastic {
public static void main(String[] args) throws UnknownHostException {
Map<String, Object> json = new HashMap<String, Object>();
json.put("user","kimchy");
json.put("postDate",new Date());
json.put("message","trying out Elasticsearch");
try {
Settings settings = Settings.settingsBuilder()
.put("cluster.name", "elasticsearch")
.put("client.transport.sniff", true).build();
TransportClient client = TransportClient.builder().settings(settings).build();
//client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));
} catch (NoNodeAvailableException e) {
System.out.println(e.toString());
}
System.out.println("test");
}
}
这很简单,但我在下面一行的错误:
TransportClient client = TransportClient.builder().settings(settings).build();
它显示错误信息像这样:
Exception in thread "main" java.lang.NullPointerException
at java.io.Reader.<init>(Reader.java:78)
at java.io.InputStreamReader.<init>(InputStreamReader.java:113)
at org.elasticsearch.node.internal.InternalSettingsPreparer.randomNodeName(InternalSettingsPreparer.java:198)
at org.elasticsearch.node.internal.InternalSettingsPreparer.finalizeSettings(InternalSettingsPreparer.java:177)
at org.elasticsearch.node.internal.InternalSettingsPreparer.prepareSettings(InternalSettingsPreparer.java:64)
at org.elasticsearch.client.transport.TransportClient$Builder.build(TransportClient.java:119)
at TryElastic.main(TryElastic.java:64)
那么,你能给我一些建议吗? gestion,我正在寻找解决方案,我找不到。有没有我需要实现的配置?我的elasticsearch服务器运行正常,它可以执行索引并从命令提示符处获得查询。谢谢...
您正在使用哪个版本的ES?你是否碰巧在你的ES'config'文件夹中有一个名为'names.txt'的文件?你能展示你如何启动ES服务器进程吗?解决这个问题的一个简单方法是在你的'elasticsearch.yml'配置文件中设置'node.name'属性。 – Val