Question

我将Phoenix安装在具有3个zookeeper节点的5节点Cloudera集群上。

我正在尝试从下面的JDBC程序运行一个基本的SQL命令，但我收到了zookeeper错误。有人可以提供建议吗？

import java.sql.*;

public class PhoenixJDBC {

 public static void main(String args[]) {

 try {
     //Register JDBC Driver
     Class.forName("org.apache.phoenix.jdbc.PhoenixDriver").newInstance();

     Connection conn = DriverManager.getConnection("jdbc:phoenix:54.152.31.122","","");

     //Create a Statement class to execute the SQL statement
     Statement stmt = conn.createStatement();

     //Execute the SQL statement and get the results in a Resultset
     ResultSet rs = stmt.executeQuery("select * from US_POPULATION");

     // Iterate through the ResultSet, displaying two values
     // for each row using the getString method

     while (rs.next())
         System.out.println("Name= " + rs.getString("host"));
 }
 catch (SQLException e) {
     e.printStackTrace();
 }
 catch (Exception e) {
     e.printStackTrace();
 }
 }
 }

例外：

org.apache.phoenix.exception.PhoenixIOException: org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase
     at org.apache.phoenix.util.ServerUtil.parseServerException(ServerUtil.java:108)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:832)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl.createTable(ConnectionQueryServicesImpl.java:1126)
     at org.apache.phoenix.query.DelegateConnectionQueryServices.createTable(DelegateConnectionQueryServices.java:110)
     at org.apache.phoenix.schema.MetaDataClient.createTableInternal(MetaDataClient.java:1590)
     at org.apache.phoenix.schema.MetaDataClient.createTable(MetaDataClient.java:568)
     at org.apache.phoenix.compile.CreateTableCompiler$2.execute(CreateTableCompiler.java:175)
     at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:271)
     at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:263)
     at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
     at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:261)
     at org.apache.phoenix.jdbc.PhoenixStatement.executeUpdate(PhoenixStatement.java:1043)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl$9.call(ConnectionQueryServicesImpl.java:1551)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl$9.call(ConnectionQueryServicesImpl.java:1520)
     at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:77)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:1520)
     at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:162)
     at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.connect(PhoenixEmbeddedDriver.java:126)
     at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:133)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at mysqljbdctest.PhoenixJDBC.main(PhoenixJDBC.java:15)
Caused by: org.apache.hadoop.hbase.MasterNotRunningException: org.apache.hadoop.hbase.MasterNotRunningException: Can't get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase
     at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$StubMaker.makeStub(HConnectionManager.java:1651)
     at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$MasterServiceStubMaker.makeStub(HConnectionManager.java:1677)
     at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getKeepAliveMasterService(HConnectionManager.java:1884)
     at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHTableDescriptor(HConnectionManager.java:2671)
     at org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:397)
     at org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:402)
     at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:764)
     ... 20 more

Answer 1

从堆栈跟踪看起来HMaster可能已关闭。

另外，您是否尝试在URL中输入完整的zookeeper仲裁？像这样：

jdbc:phoenix:54.152.31.122,54.152.31.123,54.152.31.124

我在亚马逊上遇到了问题（您的群集在哪里？）内部和外部IP混淆，而且zookeeper无法正常连接到HBase。我通过在群集中指向内部IP地址的计算机上的/ etc / hosts中创建别名，然后在本地桌面上使用相同的别名但指向外部IP来解决此问题（不是最具扩展性的解决方案，但它可以工作！）。然后，更改了我的群集设置，以便在任何地方使用别名而不是IP地址。快速测试这是否是您的问题 - 构建您的应用程序，将其复制到群集中的某个服务器上，并查看它是否可以正常运行。

希望有所帮助！

Answer 2

/ hbase是Zookeeper中的默认目录。您必须在hbase-site.xml中检查hbase在Zookeeper中保留的路径 - 可能是/ hbase-unsecure。

我们试试

jdbc:phoenix:zk-host:port:path_on_zookeeper

Apache Phoenix JDBC连接zookeeper错误

2 个答案: