Re: Hadoop source code modification.

[zhangjc]

Hi,
I have the same error "Type AvroRecord cannot be resolved to a type”, and 
the solution is:
(1) Download the latest avro-tools from 
http://mirrors.cnnic.cn/apache/avro/avro-1.7.7/java/avro-tools-1.7.7.jar 
.
(2) Change directory to 
hadoop-2.7.3-src/hadoop-common-project/hadoop-common/src/test/avro, and perform 
command:
$ java -jar /avro-tools-1.7.7.jar compile schema 
avroRecord.avsc ../java/
Note that this command will generate the corresponding java source file 
with avroRecord.avsc.
(3)Refresh the hadoop-common project in Eclipse.

My hadoop is 2.7.3, it works with avro-tools-1.7.7.jar, but not works with 
latest avro-tools-1.8.1.jar.



> 在 2016年11月19日，上午12:19，Madhvaraj Shetty  写道：
> 
> Hi,
> 
> After producing eclipse files from maven, i successfully imported hadoop 
> project to eclipse.(hadoop-common-project)
> 
> But it has few errors in eclipse:
> 
> AvroRecord cannot be resolved to a type
> EchoRequestProto cannot be resolved to a type
> TestProtobufRpcProto cannot be resolved
> TestProtobufRpcProto cannot be resolved to a type
> 
> I think it is related protocol buffer, but i can't figure out where it is.
> 
> Thanks
> 
> 
> On Tue, Nov 15, 2016 at 6:27 PM, Mallanagouda Patil 
> > 
> wrote:
> Hi,
> Some time back I have written an article on how to setup development 
> environment for Hadoop and also how to debug. 
> http://www.codeproject.com/Articles/1067129/Debugging-Hadoop-HDFS-using-IntelliJ-IDEA-on-Linux
>  
> 
> You can reach me for any issues.
> Thanks
> Mallan
> 
> 
> On Nov 15, 2016 5:49 PM, "Brahma Reddy Battula" 
> > 
> wrote:
> (Keeping user-mailing list in loop.)
> 
> You can compile corresponding module which you modified.
> 
> Please refer  "Where to run Maven from?"  from the following.
> 
> https://github.com/apache/hadoop/blob/trunk/BUILDING.txt 
> 
> 
> 
> 
> Regards
> Brahma Reddy Battula
> 
> -Original Message-
> From: Madhvaraj Shetty [mailto:madresearch2...@gmail.com 
> ]
> Sent: 15 November 2016 19:36
> To: gene...@hadoop.apache.org 
> Subject: Hadoop source code modification.
> 
> Hello,
> 
> I am working in the area of hadoop, especially i want to improve hadoop 
> security.
> 
> So i need procedure  for modifying hadoop source code.
> I have visited this  >and
> able to compile hadoop from the source code, but i need to modify the part of 
> the code.
> 
> Is it compulsory to compile the whole hadoop, can i compile/debug a part of 
> it. Any steps for that.
> 
> 
> Thank you.
> 
> -
> To unsubscribe, e-mail: user-unsubscr...@hadoop.apache.org 
> 
> For additional commands, e-mail: user-h...@hadoop.apache.org 
> 
> 
> 
> 
> -- 
> -- 
> Madhvaraj M Shetty,
> Research Scholar,
> Department of Computer Science,
> Mangalore University, Mangalagangothri, 
> Mangalore, Karnataka - 574199.
> E-mail: madhvar...@gmail.com 
> Phone: 9741449181

Re: Hadoop source code modification.

[Madhvaraj Shetty]

Hi,

After producing eclipse files from maven, i successfully imported hadoop
project to eclipse.(hadoop-common-project)

But it has few errors in eclipse:

AvroRecord cannot be resolved to a type
EchoRequestProto cannot be resolved to a type
TestProtobufRpcProto cannot be resolved
TestProtobufRpcProto cannot be resolved to a type

I think it is related protocol buffer, but i can't figure out where it is.

Thanks


On Tue, Nov 15, 2016 at 6:27 PM, Mallanagouda Patil <
mallanagouda.c.pa...@gmail.com> wrote:

> Hi,
> Some time back I have written an article on how to setup development
> environment for Hadoop and also how to debug.
> http://www.codeproject.com/Articles/1067129/Debugging-
> Hadoop-HDFS-using-IntelliJ-IDEA-on-Linux
>
> You can reach me for any issues.
> Thanks
> Mallan
>
> On Nov 15, 2016 5:49 PM, "Brahma Reddy Battula" <
> brahmareddy.batt...@huawei.com> wrote:
>
>> (Keeping user-mailing list in loop.)
>>
>> You can compile corresponding module which you modified.
>>
>> Please refer  "Where to run Maven from?"  from the following.
>>
>> https://github.com/apache/hadoop/blob/trunk/BUILDING.txt
>>
>>
>>
>> Regards
>> Brahma Reddy Battula
>>
>> -Original Message-
>> From: Madhvaraj Shetty [mailto:madresearch2...@gmail.com]
>> Sent: 15 November 2016 19:36
>> To: gene...@hadoop.apache.org
>> Subject: Hadoop source code modification.
>>
>> Hello,
>>
>> I am working in the area of hadoop, especially i want to improve hadoop
>> security.
>>
>> So i need procedure  for modifying hadoop source code.
>> I have visited this and
>> able to compile hadoop from the source code, but i need to modify the
>> part of the code.
>>
>> Is it compulsory to compile the whole hadoop, can i compile/debug a part
>> of it. Any steps for that.
>>
>>
>> Thank you.
>>
>> -
>> To unsubscribe, e-mail: user-unsubscr...@hadoop.apache.org
>> For additional commands, e-mail: user-h...@hadoop.apache.org
>>
>


-- 
-- 





*Madhvaraj M Shetty,Research Scholar,Department of Computer
Science,Mangalore University, Mangalagangothri, Mangalore, Karnataka -
574199.*
*E-mail: madhvar...@gmail.com *
*Phone: 9741449181*

RE: Hadoop source code modification.

[Mallanagouda Patil]

Hi,
Some time back I have written an article on how to setup development
environment for Hadoop and also how to debug.
http://www.codeproject.com/Articles/1067129/Debugging-Hadoop-HDFS-using-IntelliJ-IDEA-on-Linux

You can reach me for any issues.
Thanks
Mallan

On Nov 15, 2016 5:49 PM, "Brahma Reddy Battula" <
brahmareddy.batt...@huawei.com> wrote:

> (Keeping user-mailing list in loop.)
>
> You can compile corresponding module which you modified.
>
> Please refer  "Where to run Maven from?"  from the following.
>
> https://github.com/apache/hadoop/blob/trunk/BUILDING.txt
>
>
>
> Regards
> Brahma Reddy Battula
>
> -Original Message-
> From: Madhvaraj Shetty [mailto:madresearch2...@gmail.com]
> Sent: 15 November 2016 19:36
> To: gene...@hadoop.apache.org
> Subject: Hadoop source code modification.
>
> Hello,
>
> I am working in the area of hadoop, especially i want to improve hadoop
> security.
>
> So i need procedure  for modifying hadoop source code.
> I have visited this and
> able to compile hadoop from the source code, but i need to modify the part
> of the code.
>
> Is it compulsory to compile the whole hadoop, can i compile/debug a part
> of it. Any steps for that.
>
>
> Thank you.
>
> -
> To unsubscribe, e-mail: user-unsubscr...@hadoop.apache.org
> For additional commands, e-mail: user-h...@hadoop.apache.org
>

RE: Hadoop source code modification.

[Brahma Reddy Battula]

Following links might be useful fro you.


https://wiki.apache.org/hadoop/EclipseEnvironment
http://blog.cloudera.com/blog/2013/05/how-to-configure-eclipse-for-hadoop-contributions/
https://www.quora.com/What-are-the-best-ways-to-learn-about-Hadoop-source


Regards
Brahma Reddy Battula

From: Madhvaraj Shetty [mailto:madresearch2...@gmail.com]
Sent: 15 November 2016 20:27
To: Brahma Reddy Battula
Subject: Re: Hadoop source code modification.

Thank you so much sir
Any links for understanding hadoop code and classes?
Any quick way to debug OR any setup like eclipse.. to do these work?



On Tue, Nov 15, 2016 at 5:49 PM, Brahma Reddy Battula 
<brahmareddy.batt...@huawei.com<mailto:brahmareddy.batt...@huawei.com>> wrote:
(Keeping user-mailing list in loop.)

You can compile corresponding module which you modified.

Please refer  "Where to run Maven from?"  from the following.

https://github.com/apache/hadoop/blob/trunk/BUILDING.txt



Regards
Brahma Reddy Battula

-Original Message-
From: Madhvaraj Shetty 
[mailto:madresearch2...@gmail.com<mailto:madresearch2...@gmail.com>]
Sent: 15 November 2016 19:36
To: gene...@hadoop.apache.org<mailto:gene...@hadoop.apache.org>
Subject: Hadoop source code modification.

Hello,

I am working in the area of hadoop, especially i want to improve hadoop 
security.

So i need procedure  for modifying hadoop source code.
I have visited this <https://wiki.apache.org/hadoop/HowToContribute>and
able to compile hadoop from the source code, but i need to modify the part of 
the code.

Is it compulsory to compile the whole hadoop, can i compile/debug a part of it. 
Any steps for that.


Thank you.

RE: Hadoop source code modification.

[Brahma Reddy Battula]

(Keeping user-mailing list in loop.)

You can compile corresponding module which you modified.

Please refer  "Where to run Maven from?"  from the following.

https://github.com/apache/hadoop/blob/trunk/BUILDING.txt



Regards
Brahma Reddy Battula

-Original Message-
From: Madhvaraj Shetty [mailto:madresearch2...@gmail.com] 
Sent: 15 November 2016 19:36
To: gene...@hadoop.apache.org
Subject: Hadoop source code modification.

Hello,

I am working in the area of hadoop, especially i want to improve hadoop 
security.

So i need procedure  for modifying hadoop source code.
I have visited this and
able to compile hadoop from the source code, but i need to modify the part of 
the code.

Is it compulsory to compile the whole hadoop, can i compile/debug a part of it. 
Any steps for that.


Thank you.

-
To unsubscribe, e-mail: user-unsubscr...@hadoop.apache.org
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