[VOTE] Release Apache Zeppelin 0.9.0-preview2 (RC1)

[Jeff Zhang]

Hi folks, 

I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release. 


The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : 
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94

This corresponds to the tag: v0.9.0-preview1-rc2 : 
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1

The release archives (tgz), signature, and checksums are here 
https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/

The release candidate consists of the following source distribution archive 
zeppelin-v0.9.0-preview2.tgz 

In addition, the following supplementary binary distributions are provided 
for user convenience at the same location 
zeppelin-0.9.0-preview2-bin-all.tgz 


The maven artifacts are here 
https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/

You can find the KEYS file here: 
https://dist.apache.org/repos/dist/release/zeppelin/KEYS

Release notes available at 
https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221

Vote will be open for next 72 hours (close at 8am 20/July PDT). 

[ ] +1 approve 
[ ] 0 no opinion 
[ ] -1 disapprove (and reason why) 

--

[Eric Pugh]

Very excited to see preview2, 0.9.0 has been much more stable then previous versions, and the ipyn export makes it easier to use with more clients in my work.

+1 (non binding)

On Jul 17, 2020, at 11:27 AM, Yadong Xie <[hidden email]> wrote:

Thanks, Jeff

+1 from my side

Jeff Zhang <[hidden email]> 于2020年7月17日周五 下午11:25写道：

Hi folks,

I propose the following RC to be released for the Apache Zeppelin
0.9.0-preview2 release.


The commit id is a74365c0813b451db1bc78def7d1ad1279429224 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94

This corresponds to the tag: v0.9.0-preview1-rc2 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1

The release archives (tgz), signature, and checksums are here
https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/

The release candidate consists of the following source distribution
archive zeppelin-v0.9.0-preview2.tgz

In addition, the following supplementary binary distributions are provided
for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz


The maven artifacts are here
https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/

You can find the KEYS file here:
https://dist.apache.org/repos/dist/release/zeppelin/KEYS

Release notes available at
https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221

Vote will be open for next 72 hours (close at 8am 20/July PDT).

[ ] +1 approve
[ ] 0 no opinion
[ ] -1 disapprove (and reason why)


--
Best Regards

Jeff Zhang

_______________________

Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | http://www.opensourceconnections.com | My Free/Busy  

Co-Author: Apache Solr Enterprise Search Server, 3rd Ed

This e-mail and all contents, including attachments, is considered to be Company Confidential unless explicitly stated otherwise, regardless of whether attachments are marked as such.

[Anthony Corbacho]

+1

On Sat, Jul 18, 2020 at 12:54 PM Prabhjyot Singh <[hidden email]> wrote:

+1

Thank you Jeff for creating this. 

On Fri, Jul 17, 2020, 9:35 PM Eric Pugh <[hidden email]> wrote:

Very excited to see preview2, 0.9.0 has been much more stable then previous versions, and the ipyn export makes it easier to use with more clients in my work.

+1 (non binding)

On Jul 17, 2020, at 11:27 AM, Yadong Xie <[hidden email]> wrote:

Thanks, Jeff

+1 from my side

Jeff Zhang <[hidden email]> 于2020年7月17日周五 下午11:25写道：

Hi folks,

I propose the following RC to be released for the Apache Zeppelin
0.9.0-preview2 release.


The commit id is a74365c0813b451db1bc78def7d1ad1279429224 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94

This corresponds to the tag: v0.9.0-preview1-rc2 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1

The release archives (tgz), signature, and checksums are here
https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/

The release candidate consists of the following source distribution
archive zeppelin-v0.9.0-preview2.tgz

In addition, the following supplementary binary distributions are provided
for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz


The maven artifacts are here
https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/

You can find the KEYS file here:
https://dist.apache.org/repos/dist/release/zeppelin/KEYS

Release notes available at
https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221

Vote will be open for next 72 hours (close at 8am 20/July PDT).

[ ] +1 approve
[ ] 0 no opinion
[ ] -1 disapprove (and reason why)


--
Best Regards

Jeff Zhang

_______________________

Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | http://www.opensourceconnections.com | My Free/Busy  

Co-Author: Apache Solr Enterprise Search Server, 3rd Ed

This e-mail and all contents, including attachments, is considered to be Company Confidential unless explicitly stated otherwise, regardless of whether attachments are marked as such.

[Jeff Zhang]

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

[Surjan S Rawat]

+1

On Fri, Jul 17, 2020 at 9:05 AM Eric Pugh <[hidden email]> wrote:

Very excited to see preview2, 0.9.0 has been much more stable then previous versions, and the ipyn export makes it easier to use with more clients in my work.

+1 (non binding)

On Jul 17, 2020, at 11:27 AM, Yadong Xie <[hidden email]> wrote:

Thanks, Jeff

+1 from my side

Jeff Zhang <[hidden email]> 于2020年7月17日周五 下午11:25写道：

Hi folks,

I propose the following RC to be released for the Apache Zeppelin
0.9.0-preview2 release.


The commit id is a74365c0813b451db1bc78def7d1ad1279429224 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94

This corresponds to the tag: v0.9.0-preview1-rc2 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1

The release archives (tgz), signature, and checksums are here
https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/

The release candidate consists of the following source distribution
archive zeppelin-v0.9.0-preview2.tgz

In addition, the following supplementary binary distributions are provided
for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz


The maven artifacts are here
https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/

You can find the KEYS file here:
https://dist.apache.org/repos/dist/release/zeppelin/KEYS

Release notes available at
https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221

Vote will be open for next 72 hours (close at 8am 20/July PDT).

[ ] +1 approve
[ ] 0 no opinion
[ ] -1 disapprove (and reason why)


--
Best Regards

Jeff Zhang

_______________________

Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | http://www.opensourceconnections.com | My Free/Busy  

Co-Author: Apache Solr Enterprise Search Server, 3rd Ed

This e-mail and all contents, including attachments, is considered to be Company Confidential unless explicitly stated otherwise, regardless of whether attachments are marked as such.

[Jongyoul Lee]

+1

2020년 7월 19일 (일) 08:51, Surjan S Rawat <[hidden email]>님이 작성:

+1

On Fri, Jul 17, 2020 at 9:05 AM Eric Pugh <[hidden email]> wrote:

Very excited to see preview2, 0.9.0 has been much more stable then previous versions, and the ipyn export makes it easier to use with more clients in my work.

+1 (non binding)

On Jul 17, 2020, at 11:27 AM, Yadong Xie <[hidden email]> wrote:

Thanks, Jeff

+1 from my side

Jeff Zhang <[hidden email]> 于2020年7月17日周五 下午11:25写道：

Hi folks,

I propose the following RC to be released for the Apache Zeppelin
0.9.0-preview2 release.


The commit id is a74365c0813b451db1bc78def7d1ad1279429224 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94

This corresponds to the tag: v0.9.0-preview1-rc2 :
https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1

The release archives (tgz), signature, and checksums are here
https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/

The release candidate consists of the following source distribution
archive zeppelin-v0.9.0-preview2.tgz

In addition, the following supplementary binary distributions are provided
for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz


The maven artifacts are here
https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/

You can find the KEYS file here:
https://dist.apache.org/repos/dist/release/zeppelin/KEYS

Release notes available at
https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221

Vote will be open for next 72 hours (close at 8am 20/July PDT).

[ ] +1 approve
[ ] 0 no opinion
[ ] -1 disapprove (and reason why)


--
Best Regards

Jeff Zhang

_______________________

Eric Pugh | Founder & CEO | OpenSource Connections, LLC | 434.466.1467 | http://www.opensourceconnections.com | My Free/Busy  

Co-Author: Apache Solr Enterprise Search Server, 3rd Ed

This e-mail and all contents, including attachments, is considered to be Company Confidential unless explicitly stated otherwise, regardless of whether attachments are marked as such.

--

[Alex Ott]

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

[Jeff Zhang]

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

[Jeff Zhang]

Sorry, the blocker issue in spark interpreter is this one, https://issues.apache.org/jira/browse/ZEPPELIN-4962

Jeff Zhang <[hidden email]> 于2020年7月20日周一 下午9:53写道：

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

[Alex Ott]

Hi Jeff

I've found another issue in both rc1 & rc2 - if you don't specify the SPARK_HOME, then the default Spark interpreter doesn't start with following error if I execute the code for reading from Cassandra:

%spark

import org.apache.spark.sql.cassandra._
val data = spark.read.cassandraFormat("test", "test").load()
z.show(data)

org.apache.zeppelin.interpreter.InterpreterException: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:76)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:760)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:668)
at org.apache.zeppelin.scheduler.Job.run(Job.java:172)
at org.apache.zeppelin.scheduler.AbstractScheduler.runJob(AbstractScheduler.java:130)
at org.apache.zeppelin.scheduler.FIFOScheduler.lambda$runJobInScheduler$0(FIFOScheduler.java:39)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:71)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:58)
at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:80)
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 13 more
ERROR

This works just fine in the preview1, without any additional configuration. I remember that we had something around this already reported, but I can't find JIRA

What do you think?

On Mon, Jul 20, 2020 at 3:54 PM Jeff Zhang <[hidden email]> wrote:

Sorry, the blocker issue in spark interpreter is this one, https://issues.apache.org/jira/browse/ZEPPELIN-4962

Jeff Zhang <[hidden email]> 于2020年7月20日周一 下午9:53写道：

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

Best Regards

Jeff Zhang

--

[Philipp Dallig]

Hi Alex,

It seems that Hadoop classes are missing. Do you include Hadoop jars with "-P include-hadoop"?
I think it's related to https://github.com/apache/zeppelin/commit/6fa79a9fc743f2b4321ac9e8713b3380bb4d64c9#diff-600376dffeb79835ede4a0b285078036.

Philipp

Am 21.07.20 um 11:28 schrieb Alex Ott:

Hi Jeff

I've found another issue in both rc1 & rc2 - if you don't specify the SPARK_HOME, then the default Spark interpreter doesn't start with following error if I execute the code for reading from Cassandra:

%spark

import org.apache.spark.sql.cassandra._
val data = spark.read.cassandraFormat("test", "test").load()
z.show(data)

org.apache.zeppelin.interpreter.InterpreterException: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:76)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:760)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:668)
at org.apache.zeppelin.scheduler.Job.run(Job.java:172)
at org.apache.zeppelin.scheduler.AbstractScheduler.runJob(AbstractScheduler.java:130)
at org.apache.zeppelin.scheduler.FIFOScheduler.lambda$runJobInScheduler$0(FIFOScheduler.java:39)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:71)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:58)
at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:80)
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 13 more
ERROR

This works just fine in the preview1, without any additional configuration. I remember that we had something around this already reported, but I can't find JIRA

What do you think?

On Mon, Jul 20, 2020 at 3:54 PM Jeff Zhang <[hidden email]> wrote:

Sorry, the blocker issue in spark interpreter is this one, https://issues.apache.org/jira/browse/ZEPPELIN-4962

Jeff Zhang <[hidden email]> 于2020年7月20日周一 下午9:53写道：

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

Best Regards

Jeff Zhang

--

[Jeff Zhang]

That's right, In that PR, I exclude hadoop jars from zeppelin distribution, so that we can support both hadoop2 and hadoop3 (user could set USE_HADOOP=true in zeppelin-env.sh, so that zeppelin run command `hadoop classpath` and put all the hadoop jars in classpath of zeppelin.

But for this issue, it seems even setting USE_HADOOP won't work, because we didn't put hadoop jars in the spark dependencies jars. Let me fix it quickly. 

Philipp Dallig <[hidden email]> 于2020年7月21日周二 下午5:41写道：

Hi Alex,

It seems that Hadoop classes are missing. Do you include Hadoop jars with "-P include-hadoop"?
I think it's related to https://github.com/apache/zeppelin/commit/6fa79a9fc743f2b4321ac9e8713b3380bb4d64c9#diff-600376dffeb79835ede4a0b285078036.

Philipp

Am 21.07.20 um 11:28 schrieb Alex Ott:

Hi Jeff

I've found another issue in both rc1 & rc2 - if you don't specify the SPARK_HOME, then the default Spark interpreter doesn't start with following error if I execute the code for reading from Cassandra:

%spark

import org.apache.spark.sql.cassandra._
val data = spark.read.cassandraFormat("test", "test").load()
z.show(data)

org.apache.zeppelin.interpreter.InterpreterException: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:76)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:760)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:668)
at org.apache.zeppelin.scheduler.Job.run(Job.java:172)
at org.apache.zeppelin.scheduler.AbstractScheduler.runJob(AbstractScheduler.java:130)
at org.apache.zeppelin.scheduler.FIFOScheduler.lambda$runJobInScheduler$0(FIFOScheduler.java:39)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:71)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:58)
at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:80)
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 13 more
ERROR

This works just fine in the preview1, without any additional configuration. I remember that we had something around this already reported, but I can't find JIRA

What do you think?

On Mon, Jul 20, 2020 at 3:54 PM Jeff Zhang <[hidden email]> wrote:

Sorry, the blocker issue in spark interpreter is this one, https://issues.apache.org/jira/browse/ZEPPELIN-4962

Jeff Zhang <[hidden email]> 于2020年7月20日周一 下午9:53写道：

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

[Alex Ott]

I didn't compile it myself, I just use binaries that Jeff created for preview2. My point is that it worked out of box in preview1, and previous versions, and should continue be the same, otherwise it's a very breaking change that requires that people know about that...

On Tue, Jul 21, 2020 at 11:41 AM Philipp Dallig <[hidden email]> wrote:

Hi Alex,

It seems that Hadoop classes are missing. Do you include Hadoop jars with "-P include-hadoop"?
I think it's related to https://github.com/apache/zeppelin/commit/6fa79a9fc743f2b4321ac9e8713b3380bb4d64c9#diff-600376dffeb79835ede4a0b285078036.

Philipp

Am 21.07.20 um 11:28 schrieb Alex Ott:

Hi Jeff

I've found another issue in both rc1 & rc2 - if you don't specify the SPARK_HOME, then the default Spark interpreter doesn't start with following error if I execute the code for reading from Cassandra:

%spark

import org.apache.spark.sql.cassandra._
val data = spark.read.cassandraFormat("test", "test").load()
z.show(data)

org.apache.zeppelin.interpreter.InterpreterException: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:76)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:760)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:668)
at org.apache.zeppelin.scheduler.Job.run(Job.java:172)
at org.apache.zeppelin.scheduler.AbstractScheduler.runJob(AbstractScheduler.java:130)
at org.apache.zeppelin.scheduler.FIFOScheduler.lambda$runJobInScheduler$0(FIFOScheduler.java:39)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream
at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:71)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:58)
at org.apache.zeppelin.spark.SparkInterpreter.open(SparkInterpreter.java:80)
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.fs.FSDataInputStream
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 13 more
ERROR

This works just fine in the preview1, without any additional configuration. I remember that we had something around this already reported, but I can't find JIRA

What do you think?

On Mon, Jul 20, 2020 at 3:54 PM Jeff Zhang <[hidden email]> wrote:

Sorry, the blocker issue in spark interpreter is this one, https://issues.apache.org/jira/browse/ZEPPELIN-4962

Jeff Zhang <[hidden email]> 于2020年7月20日周一 下午9:53写道：

Thanks Alex, I also found another blocker issue in spark interpreter.  https://issues.apache.org/jira/browse/ZEPPELIN-4912

Folks, 

I'd like to cancel this RC, and will prepare another RC after these 2 blocker issues. 

Alex Ott <[hidden email]> 于2020年7月20日周一 下午6:44写道：

Hi Jeff

I didn't identify the root cause (I'm not a HTML/JavaScript developer), but I fixed the issue. PR is open: https://github.com/apache/zeppelin/pull/3858 - it's primarily HTML templates changes, so it could be merged quite fast, and then we can cut new RC.

On Sat, Jul 18, 2020 at 3:43 PM Jeff Zhang <[hidden email]> wrote:

Thanks for the feedback, [hidden email] , We can wait for your fix, and everyone else can continue to test the preview2. 

Alex Ott <[hidden email]> 于2020年7月18日周六 下午6:13写道：

I'm hitting https://issues.apache.org/jira/browse/ZEPPELIN-4787 in
Cassandra interpreter, need to investigate why this happens - is it result
of the Cassandra interpreter refactoring, or something else... Everything
was fine in the preview1, and many templates weren't affected by
refactoring, but are broken now.

I would prefer to fix this for preview, but I need 1-2 days for
investigation


On Fri, Jul 17, 2020 at 5:25 PM Jeff Zhang <[hidden email]> wrote:

>
> Hi folks,
>
> I propose the following RC to be released for the Apache Zeppelin 0.9.0-preview2 release.
>
>
> The commit id is a74365c0813b451db1bc78def7d1ad1279429224 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=commit;h=dd2058395ad4cf08fb6bdc901ec0c426c5095a94
>
> This corresponds to the tag: v0.9.0-preview1-rc2 : https://gitbox.apache.org/repos/asf?p=zeppelin.git;a=shortlog;h=refs/tags/v0.9.0-preview2-rc1
>
> The release archives (tgz), signature, and checksums are here https://dist.apache.org/repos/dist/dev/zeppelin/zeppelin-0.9.0-preview2-rc1/
>
> The release candidate consists of the following source distribution archive zeppelin-v0.9.0-preview2.tgz
>
> In addition, the following supplementary binary distributions are provided
> for user convenience at the same location zeppelin-0.9.0-preview2-bin-all.tgz
>
>
> The maven artifacts are here https://repository.apache.org/content/repositories/orgapachezeppelin-1279/org/apache/zeppelin/
>
> You can find the KEYS file here: https://dist.apache.org/repos/dist/release/zeppelin/KEYS
>
> Release notes available at https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12342692&styleName=&projectId=12316221
>
> Vote will be open for next 72 hours (close at 8am 20/July PDT).
>
> [ ] +1 approve
> [ ] 0 no opinion
> [ ] -1 disapprove (and reason why)
>
>
> --
> Best Regards
>
> Jeff Zhang
>


--
With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--

Best Regards

Jeff Zhang

--

Best Regards

Jeff Zhang

--

With best wishes,                    Alex Ott
http://alexott.net/
Twitter: alexott_en (English), alexott (Russian)

--