Question

i need to read .properties file which is available in the hdfs. i am using the below code but it throws a run time error.

FileSystem fs = FileSystem.get(config);

    Properties conf = wc.createConfiguration();
    Properties prop = new Properties();
    String appPath = "hdfs://clusterdb05.com:8020/user/cmahajan/" + version + "/apps/apps/";
    conf.setProperty(OozieClient.APP_PATH,appPath);
    FileInputStream f = new FileInputStream("hdfs://clusterdb05.com:8020/user/cmahajan/app.properties");
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));

the run time error is :

LaunchJob.java:28: cannot find symbol

symbol  : class ObjectInputStream
location: class LaunchJob
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));
    ^
LaunchJob.java:28: cannot find symbol
symbol  : class ObjectInputStream
location: class LaunchJob
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));

Answer 1

Either use fully qualified name of class:

java.io.ObjectInputStream 

OR

import the class using following line:

import java.io.ObjectInputStream;