Hadoop credential provider allows to read passwords for every user

package com.test.app;

import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.alias.CredentialProvider;
import org.apache.hadoop.security.alias.CredentialProviderFactory;

import java.io.IOException;

public class PasswordReader {
  public static void main(String[] args) throws IOException {
    if (args == null || args.length == 0){
      throw new IllegalArgumentException("Credential provider path is to set");
    }
    String credentialProviderPath = args[0];
    Configuration configuration = new Configuration();
    configuration.set(CredentialProviderFactory.CREDENTIAL_PROVIDER_PATH, credentialProviderPath);
    CredentialProvider credentialProvider = CredentialProviderFactory.getProviders(configuration).get(0);
    List<String> aliases = credentialProvider.getAliases();
    for(String alias : aliases){
      System.out.println(alias + " = " + new String(configuration.getPassword(alias)));
    }
  }
}

java -cp $(hadoop classpath):password-reader.jar com.test.app.PasswordReader  jceks://hdfs/user/hive/hivemetastore.jceks

javax.jdo.option.connectionpassword = 123456

2018-05-31T10:08:40,191 ERROR [pool-7-thread-41] fs.Inode: Marking failure for: /user/hive/hivemetastore.jceks, error: Input/output error
2018-05-31T10:08:40,192 ERROR [pool-7-thread-41] fs.Inode: Throwing exception for: /user/hive/hivemetastore.jceks, error: Input/output error
2018-05-31T10:08:40,192 ERROR [pool-7-thread-41] metastore.RetryingHMSHandler: java.lang.RuntimeException: Error getting metastore password: null
    at org.apache.hadoop.hive.metastore.ObjectStore.getDataSourceProps(ObjectStore.java:485)
    at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:279)