Thanks PJ Fanning and slfan for your suggestions !

> Would it be possible to consider using a lightweight HTTP client instead?
Thanks for reminding me, this makes sense to me. I'll try to solve it as soon 
as possible.

> We are upgrading to Junit5 and need TOS's Unit Tests to be developed in the 
> Junit5 way,
Thanks for your nice suggestion. Let me fix this.

I will update as soon as possible. If you have any other questions, please feel 
free to comment.

On 2025/02/15 02:59:02 slfan1989 wrote:
> Thanks to Jinglun for initiating the discussion on TOS.
> 
> +1 from my personal perspective.
> 
> However, considering that we are upgrading to Junit5 and need TOS's Unit
> Tests to be developed in the Junit5 way, we can discuss it together under
> the relevant PR.
> 
> Regarding PJ Fanning's suggestion, I think we should pay attention to it.
> He has a deeper insight into this part.
> 
> Best Regards,
> - Shilun Fan
> 
> On Sat, Feb 14, 2025 at 20:58 PM PJ Fanning <fannin...@apache.org> wrote:
> 
> >
> > Just one thing to note is that we recently removed or reduced the
> > okhttp3 dependency in Hadoop because the kotlin dependency brings in
> > big jars and more complicated management of transitive dependencies.
> > Would it be possible to consider using a lightweight HTTP client
> > instead? The built-in Java client or Apache HttpClient are examples.
> >
> > https://issues.apache.org/jira/browse/HADOOP-18890
> >
> > On Fri, 14 Feb 2025 at 12:41, Jinglun wrote:
> > >
> > > Thanks xiaoqiao and steve for your attention and comments. Let me answer
> > the dependencies and tests.
> > >
> > > **Dependencies**
> > > Hadoop-tos involves a new dependency
> > com.volcengine:ve-tos-java-sdk:2.8.6. It is an open source project with
> > apache 2.0 license (
> > https://github.com/volcengine/ve-tos-java-sdk/blob/main/LICENSE).
> > >
> > > Here are the dependencies involved by
> > com.volcengine:ve-tos-java-sdk:2.8.6. They (okhttp, okio, kotlin, jackson)
> > are open source with apache 2.0 too.
> > > [INFO] +- com.volcengine:ve-tos-java-sdk:jar:2.8.7:compile
> > > [INFO] | +- com.squareup.okhttp3:okhttp:jar:4.10.0:compile
> > > [INFO] | | +- com.squareup.okio:okio-jvm:jar:3.0.0:compile
> > > [INFO] | | | \- org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:1.6.20:test
> > > [INFO] | | | \- org.jetbrains.kotlin:kotlin-stdlib-jdk7:jar:1.6.20:test
> > > [INFO] | | \- org.jetbrains.kotlin:kotlin-stdlib:jar:1.6.20:compile
> > > [INFO] | | \- org.jetbrains:annotations:jar:13.0:compile
> > > [INFO] | \-
> > com.fasterxml.jackson.core:jackson-annotations:jar:2.12.7:compile
> > > [INFO] +- org.jetbrains.kotlin:kotlin-stdlib-common:jar:1.6.20:compile
> > >
> > > **How is it tested**
> > > The hadoop-tos module has a complete unit test set, including the
> > contracts and extended test cases. To run it, we need a machine that can
> > connect to TOS. Setting the 6 environment variables below.
> > > ```
> > > export TOS_ACCESS_KEY_ID={YOUR_ACCESS_KEY}
> > > export TOS_SECRET_ACCESS_KEY={YOUR_SECRET_ACCESS_KEY}
> > > export TOS_ENDPOINT={TOS_SERVICE_ENDPOINT}
> > > export FILE_STORAGE_ROOT=/tmp/local_dev/
> > > export TOS_BUCKET={YOUR_BUCKET_NAME}
> > > export TOS_UNIT_TEST_ENABLED=true
> > > ```
> > > Then cd to hadoop project root directory, and run the test command below.
> > > ```
> > > mvn -Dtest=org.apache.hadoop.fs.tosfs.** test -pl
> > org.apache.hadoop:hadoop-tos
> > > ```
> > > I also test it in a real hadoop environment. The document (index.md)
> > describes how to set jars and configure keys. Common tests include: shell
> > commands, Terasort, DFSIO, NNBench, Distcp, etc.
> > >
> > > **Test Environment**
> > > We need a VolcanoEngine account to run all the test cases. I can provide
> > an environment for test. Please let me know if you need to test hadoop-tos (
> > jing...@apache.org).
> > >
> > >
> > >
> > >
> > > On 2025/02/13 18:21:57 Steve Loughran wrote:
> > > > Sounds good, though expect no commitment from me to review anything.
> > > > My main concerns are about dependency libraries (what are they?) and
> > > > testing.
> > > >
> > > > On Tue, 11 Feb 2025 at 05:10, Xiaoqiao He wrote:
> > > >
> > > > > Thanks Jinglun for your work. Basically +1 from me to involve it
> > into the
> > > > > Hadoop codebase.
> > > > > a. After a quick review of JIRA and PR, I think it is solid including
> > > > > document and code style.
> > > > > b. Contributors involved here are diverse who are from different
> > projects
> > > > > and companies, and active enough.
> > > > > c. Community with Jinlun offline many times, and IMO he could be
> > > > > responsible to review and test about this module.
> > > > > Beside that, just suggest following the Hadoop guidelines[1] to
> > develop
> > > > > the new features.
> > > > >
> > > > > @Steve Loughran @Shilun Fan leave
> > > > > some comments including some concerns in JIRA, would you mind giving
> > more
> > > > > suggestions for this discussion?
> > > > > Thanks.
> > > > >
> > > > > Best Regards,
> > > > > - He Xiaoqiao
> > > > >
> > > > > [1] https://hadoop.apache.org/bylaws.html
> > > > >
> > > > >
> > > > > On Sun, Jan 26, 2025 at 3:39 PM jinglun wrote:
> > > > >
> > > > >> Hello everyone, I'd like to discuss the integration of volcano
> > engine tos
> > > > >> in hadoop.
> > > > >>
> > > > >>
> > > > >> Volcano Engine is a fast growing cloud vendor launched by
> > ByteDance, and
> > > > >> TOS is the object storage service of Volcano Engine. A common way
> > is to
> > > > >> store data into TOS and run Hadoop/Spark/Flink applications to
> > access TOS.
> > > > >> But there is no original support for TOS in hadoop, thus it is not
> > easy for
> > > > >> users to build their Big Data System based on TOS.
> > > > >>
> > > > >> My proposal is to integrate TOS with Hadoop to help users run their
> > > > >> applications on TOS. Users only need to do some simple
> > configuration, then
> > > > >> their applications can read/write TOS without any code change. This
> > work is
> > > > >> similar to AWS S3, AzureBlob, AliyunOSS, Tencnet COS and
> > HuaweiCloud Object
> > > > >> Storage in Hadoop.
> > > > >>
> > > > >>
> > > > >> More details could be found at
> > > > >> https://issues.apache.org/jira/browse/HADOOP-19236.
> > > > >>
> > > > >>
> > > > >> 1. What is the progress of the work now?
> > > > >> The work is currently finished at branch HADOOP_19236. It is
> > developed by
> > > > >> the EMR team of Volcano Engine and served many users from both
> > cloud and
> > > > >> IDC for more than 2 years.
> > > > >>
> > > > >>
> > > > >> 2. How is the long-term maintenance and testing guaranteed?
> > > > >> The contributors are opensource friendly, including ZhengHu(PMC
> > > > >> of HBase and Iceberg), Jinglun(Committer of
> > Hadoop), SunXin(Committer
> > > > >> of HBase), XianyinXin(Contributor of Spark), Rascal Wu(Contributor
> > of
> > > > >> Flink), FangBo(Contributor of Hive) and Yuanzhihuan. We will all be
> > > > >> involved in the long-term maintenance of this work. As time goes by,
> > > > >> more people from the EMR team and the hadoop-tos users may join
> > this work.
> > > > >> So I'm confident at the long-term maintenance and testing.
> > > > >>
> > > > >>
> > > > >> 3. Why should hadoop-tos interaged to hadoop codebase? Shall we use
> > an
> > > > >> independent project?
> > > > >> Integration is for a better user experience. First, users don't
> > need to
> > > > >> go to another repo to find the tos support. Second, users don't
> > need to
> > > > >> worry about the versions mapping between hadoop and hadoop-tos.
> > Finally, a
> > > > >> connector provided by hadoop community is more reliable and
> > > > >> trustworthy.
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >>
> > > > >> If you have any question, concern or any thing else that is unclear,
> > > > >> please let me know. Sincerely looking forward to your reply, thanks
> > > > >> very much.
> > > > >
> > > > >
> > > >
> > >
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