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本文介紹了如何將Java客戶端連接到Windows 10上的Azure Cosmos數據庫模擬器，找不到證書的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！

問題描述

問題：我的演示代碼客戶端無法連接到Windows 10上的Azure Cosmos模擬器。

步驟：

我在Windows上安裝了Cosmosdb模擬器-看起來不錯

根據文檔，我啟動了Windows cert manage.msc。我選擇友好名稱為&quot；DocumentDBEmulatorCertificate&quot；的私有證書作為本地磁盤的base64編碼的x.509.cer文件

我以管理員身份啟動了Windows中的cmd控制臺，并將cmd控制臺cd轉到本地JAVA_HOME/lib/security目錄(我使用的是Java 8.0.131)

我使用此命令運行了keytool

keytool-import-trustcacerts-keystore cacerts-store pass changeit-nopt-alias azureCosmossDBEmulator-FILE&QUOT；D：導出的certificatescosmossDB-emulator-cert.cer&quot；

我將修改后的密鑰庫列出為dump.txt文件。我可以在轉儲中看到我的條目

azurecosmossdbmulator，2017年8月30日，trustedCertEntry，
證書指紋(Sha1)：5B:F4:14:BE:9F:2B:7F:6A:2B:C0:87:A4:3E:4D:9A:52:45:FA:2F:EA

并且這與X.509證書中的指紋值匹配。

我在生成時重新啟動了IntelliJ，并檢查Java 8.0.1.3.1是項目中唯一的JDK。

我在調試中啟動了Groovy測試腳本，并逐步執行代碼。我可以創建DocumentClient OK。

這只是測試連接代碼的粗略腳本，如下所示

 final String key = "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw=="

 DocumentClient client = new DocumentClient("https://localhost:8081", key
             , new ConnectionPolicy(), ConsistencyLevel.Session)

 String dbname = "familyDB"
     String dblink = "/dbs/$dbname"

 //create db if not exists
 try {
     client.readDatabase(dblink,null)
     println "found db $dbname"
 } catch (DocumentClientException de) {
     if (de.getStatusCode() == 404) {
         Database db = new Database()
         db.id = dbname
         client.createDatabase(db, null)
         println "created new DB $dbname"
 } else {
     throw de
 }
 }

當我到達client.readDatabase行時，我收到如下異常：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Caught: java.lang.IllegalStateException: Http client execution failed.
java.lang.IllegalStateException: Http client execution failed.
    at com.microsoft.azure.documentdb.internal.GatewayProxy.performGetRequest(GatewayProxy.java:234)
    at com.microsoft.azure.documentdb.internal.GatewayProxy.doRead(GatewayProxy.java:89)
    at com.microsoft.azure.documentdb.internal.GatewayProxy.processMessage(GatewayProxy.java:336)
    at com.microsoft.azure.documentdb.DocumentClient$8.apply(DocumentClient.java:2985)
    at com.microsoft.azure.documentdb.internal.RetryUtility.executeDocumentClientRequest(RetryUtility.java:58)
    at com.microsoft.azure.documentdb.DocumentClient.doRead(DocumentClient.java:2991)
    at com.microsoft.azure.documentdb.DocumentClient.readDatabase(DocumentClient.java:491)
    at com.microsoft.azure.documentdb.DocumentClient$readDatabase.call(Unknown Source)
    at com.softwood.azure.client.cosmossDBClientScript.run(cosmossDBClientScript.groovy:29)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
    at com.microsoft.azure.documentdb.internal.GatewayProxy.performGetRequest(GatewayProxy.java:231)
    ... 8 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    ... 20 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    ... 20 more

這基本上說明它找不到我的cacert條目并拒絕連接。

出了什么問題？(我還沒有重新啟動Windows)。證書看起來沒問題，似乎可以通過keytool導入cacerts，我使用的是單個JDK引用，但代碼無法連接。

我如何才能解開我沒有正確完成的、現在必須執行的操作才能使代碼從Java連接到在Windows 10計算機上本地運行的Azure DB模擬器？

推薦答案

根據您的描述，我還使用Document DB JavaSDK編寫了一段代碼連接到Cosmos DB仿真器，結果遇到了與您相同的問題。

package emulator;

import com.microsoft.azure.documentdb.ConnectionPolicy;
import com.microsoft.azure.documentdb.ConsistencyLevel;
import com.microsoft.azure.documentdb.Database;
import com.microsoft.azure.documentdb.DocumentClient;
import com.microsoft.azure.documentdb.DocumentClientException;

public class TestEmlulator {

    // Replace with your DocumentDB end point and master key.
    private static final String END_POINT = "https://localhost:8081/";
    private static final String MASTER_KEY = "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";

    public static void main(String[] args) throws DocumentClientException {
        // Connect to the Azure Cosmos DB Emulator running locally
        DocumentClient client = new DocumentClient(END_POINT, MASTER_KEY, ConnectionPolicy.GetDefault(),
                ConsistencyLevel.Session);

        Database database = new Database();
        database.setId("testEmulator");
        database = client.createDatabase(database, null).getResource();

        System.out.println(database.toJson());
    }

}

所以我導出cosmosDB的證書，將其命名為documentdbemulatorcert.cer，并按照official tutorial提供的方式存儲在我的D盤中。您似乎也做了同樣的事情。

然后，我嘗試將cosmosdb的證書導入到JVM信任證書列表中。您也可以參考下面的步驟：

步驟1：打開CMD命令窗口，進入%JAVA_HOME%/jre/lib/security目錄。請注意，必須使用administrator privileges

打開命令窗口

對我來說，目錄看起來像C:Program FilesJavajdk1.8.0_131jrelibsecurity

步驟2：在打開的命令窗口中，輸入以下命令：

keytool -import -alias cacerts -keystore cacerts -file d:documentdbemulatorcert.cer

輸入默認密碼：changeit，然后在Trust this certificate? [no]:

旁邊輸入Y或y

第3步：您可以看到Certificate was added to keystore證書是否已成功導入。

您可以參考下面的截圖了解整個過程：

最后，我的代碼可以工作了！

您也可以參考下面的SO線程：

1.Unable to find valid certification path to requested target – error even after cert imported

2."PKIX path building failed" and "unable to find valid certification path to requested target"

希望它能幫助您。

這篇關于如何將Java客戶端連接到Windows 10上的Azure Cosmos數據庫模擬器，找不到證書的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，