Hbase API 运行提示Caused by: javax.security.auth.login.LoginException: 无法找到 LoginModule 类:
虚拟机hbase可以正常运行,但是用idea连接hbase就一直报这个错
下面是pom文件和测试连接代码
来个遇见过的人帮帮我吧,急!
Hbase API 运行提示Caused by: javax.security.auth.login.LoginException: 无法找到 LoginModule 类:
虚拟机hbase可以正常运行,但是用idea连接hbase就一直报这个错
下面是pom文件和测试连接代码
让阿豪来帮你解答,本回答参考chatgpt3.5编写提供,如果还有疑问可以评论或留言问题分析: 根据错误提示,似乎是缺少了 LoginModule 类。LoginModule 是进行身份验证的模块,缺少它会导致无法进行身份验证,进而出现连接错误。 可能原因:
<dependencies>
<!--HBase client-->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>1.4.4</version>
</dependency>
<!--HBase server dependencies-->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-server</artifactId>
<version>1.4.4</version>
</dependency>
<!--HBase testing dependencies-->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-testing-util</artifactId>
<version>1.4.4</version>
</dependency>
</dependencies>
// 设置 Kerberos 凭证
Configuration conf = HBaseConfiguration.create();
conf.set("hadoop.security.authentication", "kerberos");
System.setProperty("java.security.krb5.conf", "/etc/krb5.conf");
UserGroupInformation.setConfiguration(conf);
UserGroupInformation.loginUserFromKeytab("hbase@MY_DOMAIN.COM", "/etc/hbase.keytab");
// 获取 HTable 实例
HTable table = new HTable(conf, "my_table");
代码实例: 根据以上两点,我们建议检查相关的依赖和代码,以确保正确性。以下是一个简单的示例代码,展示了如何使用 HBase API 连接 HBase 数据库:
public class HbaseTest {
private static Configuration conf = null;
private static HBaseAdmin admin = null;
private static String TABLE_NAME = "my_table";
private static String COLUMN_FAMILY = "my_cf";
private static String QUALIFIER = "my_qualifier";
private static String VALUE = "my_value";
static {
conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum", "localhost");
conf.set("hbase.zookeeper.property.clientPort", "2181");
try {
admin = new HBaseAdmin(conf);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws IOException {
createTable(TABLE_NAME, COLUMN_FAMILY);
insertData(TABLE_NAME, COLUMN_FAMILY, QUALIFIER, VALUE);
getData(TABLE_NAME);
deleteTable(TABLE_NAME);
}
// 创建表
public static void createTable(String tableName, String columnFamily) throws IOException {
HTableDescriptor desc = new HTableDescriptor(tableName.getBytes());
desc.addFamily(new HColumnDescriptor(columnFamily.getBytes()));
if (admin.tableExists(tableName)) {
System.out.println("Table " + tableName + " already exists!");
} else {
admin.createTable(desc);
System.out.println("Table " + tableName + " created successfully.");
}
}
// 插入数据
public static void insertData(String tableName, String columnFamily, String qualifier, String value) throws IOException {
Put put = new Put(Bytes.toBytes("row001"));
put.add(Bytes.toBytes(columnFamily), Bytes.toBytes(qualifier), Bytes.toBytes(value));
HTable table = new HTable(conf, Bytes.toBytes(tableName));
table.put(put);
System.out.println("Data inserted successfully.");
}
// 获取数据
public static void getData(String tableName) throws IOException {
HTable table = new HTable(conf, Bytes.toBytes(tableName));
Get get = new Get(Bytes.toBytes("row001"));
Result result = table.get(get);
for (Cell cell : result.rawCells()) {
System.out.print(new String(CellUtil.cloneRow(cell)) + " ");
System.out.print(new String(CellUtil.cloneFamily(cell)) + ":");
System.out.print(new String(CellUtil.cloneQualifier(cell)) + " ");
System.out.println(new String(CellUtil.cloneValue(cell)));
}
}
// 删除表
public static void deleteTable(String tableName) throws IOException {
if (admin.tableExists(tableName)) {
admin.disableTable(tableName);
admin.deleteTable(tableName);
System.out.println("Table " + tableName + " deleted successfully.");
} else {
System.out.println("Table " + tableName + " does not exist.");
}
}
}
此代码创建名为 my_table 的表,并在其中插入一行数据。它还检索数据,然后删除表。在运行此代码时,请确保正确配置了 HBase API,并将依赖项添加到 pom.xml 文件中。