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MapReduce >> mail # user >> Write an object into hadoop hdfs issue


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Re: Write an object into hadoop hdfs issue
Is there a way to store the same object?
On Mon, Dec 30, 2013 at 7:05 PM, Chris Mawata <[EMAIL PROTECTED]>wrote:

> Not unique to hdfs. The same thing would happen on your local file system
> or anywhere and any way you store the state of the object outside of the
> JVM.  That is why singletons should not be serializable.
> Chris
> On Dec 30, 2013 5:46 AM, "unmesha sreeveni" <[EMAIL PROTECTED]> wrote:
>
>> I am trying to write an object into hdfs .
>>
>>
>> public static Split *currentsplit *= new Split();
>>
>> *Split currentsplit = new Split();*
>> *Path p = new Path("C45/mysavedobject");*
>> *ObjectOutputStream oos = new ObjectOutputStream(fs.create(p));*
>> *oos.writeObject(currentsplit);*
>> *oos.close();*
>>
>> But I am not able to get the exact object value.
>>
>> *Path p = new Path("C45/mysavedobject");*
>> *Split curntsplit = null;*
>> *ObjectInputStream ois = new ObjectInputStream(fs.open(p));*
>> *try {*
>> *    curntsplit = (Split) ois.readObject();*
>> *} catch (ClassNotFoundException e) {*
>> *    // TODO Auto-generated catch block*
>> *    e.printStackTrace();*
>> *}*
>> * ois.close();*
>>
>> Showing duplicate objects value.
>>
>> In driver i am getting :
>>
>> *objjjjjjj in driver pck.Split@14da173c*
>>
>> After writing the object into file and reading back within driver itself
>> I am getting an alternate object value.
>>
>> *objjjjjj in mysavedobject pck.Split@62eade0*
>>
>>
>> I want the driver object along my Mapper code.
>>
>> Why is it so?
>>
>> --
>> *Thanks & Regards*
>>
>> Unmesha Sreeveni U.B
>>
>>
--
*Thanks & Regards*

Unmesha Sreeveni U.B

*Junior Developer*
http://www.unmeshasreeveni.blogspot.in/