我elasticsearch的Java中的簡單代碼:爲什麼我的elasticsearch無法在JAVA API中構建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");
}
}
這很簡單,但我在下面一行的錯誤:
TransportClient client = TransportClient.builder().settings(settings).build();
它顯示錯誤信息像這樣:
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)
那麼,你能給我一些建議嗎? gestion,我正在尋找解決方案,我找不到。有沒有我需要實現的配置?我的elasticsearch服務器運行正常,它可以執行索引並從命令提示符處獲得查詢。謝謝...
您正在使用哪個版本的ES?你是否碰巧在你的ES'config'文件夾中有一個名爲'names.txt'的文件?你能展示你如何啓動ES服務器進程嗎?解決這個問題的一個簡單方法是在你的'elasticsearch.yml'配置文件中設置'node.name'屬性。 – Val