Re: 0.9.0 - R tutorial - google vis - no output

2020-07-02 Thread Jeff Zhang 
It might be a bug of googlevis or version mismatch, because googlevis
doesn't work in jupyter for me too.


David Boyd  于2020年7月3日周五 上午8:26写道：

> Jeff:
>Good to know.
>
> Thank you so much for the prompt responses and patience with me.
> On 7/2/2020 8:16 PM, Jeff Zhang wrote:
>
> It looks like a bug, I can reproduce this issue.
>
> David Boyd  于2020年7月3日周五 上午7:43写道：
>
>> All:
>>
>>   Sorry for dumping so much on the list lately.  Making progress but it
>> is slow.
>>
>> So I finally got the %ir interpreter to work.
>>
>> Got pretty much every paragraph to work with either %r or %ir
>> But I am not able to get any of the google vis outputs to generate
>> any output.
>>
>> First question - is this because flash has basically been disabled across
>> the board?
>> I found
>> If I look at say the bubble object from that paragrah it looks
>> like it has real data:
>>
>> $type 'BubbleChart' $chartid 'BubbleChartID30605c24963' $html $header 
>> '> html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"\n
>> "https://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
>> >\n> "https://www.w3.org/1999/xhtml"; 
>> >\n\nBubbleChartID30605c24963\n> http-equiv="content-type" content="text/html;charset=utf-8" />\n> type="text/css">\nbody {\n color: #44;\n font-family:
>> Arial,Helvetica,sans-serif;\n font-size: 75%;\n }\n a {\n color: #4D87C7;\n
>> text-decoration: none;\n}\n\n\n\n' $chart jsHeader '\n\n\n\n\n

Re: 0.9.0 - R tutorial - google vis - no output

2020-07-02 Thread David Boyd 

Jeff:
   Good to know.

Thank you so much for the prompt responses and patience with me.

On 7/2/2020 8:16 PM, Jeff Zhang wrote:

It looks like a bug, I can reproduce this issue.

David Boyd mailto:db...@incadencecorp.com>> 
于2020年7月3日周五 上午7:43写道：


All:

  Sorry for dumping so much on the list lately.  Making progress
but it is slow.

So I finally got the %ir interpreter to work.

Got pretty much every paragraph to work with either %r or %ir
But I am not able to get any of the google vis outputs to generate
any output.

First question - is this because flash has basically been disabled
across the board?
I found
If I look at say the bubble object from that paragrah it looks
like it has real data:


$type
'BubbleChart'
$chartid
'BubbleChartID30605c24963'
$html

$header
'https://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
>\nhttps://www.w3.org/1999/xhtml";

>\n\nBubbleChartID30605c24963\n\n\nbody {\n color: #44;\n font-family:
Arial,Helvetica,sans-serif;\n font-size: 75%;\n }\n a {\n
color: #4D87C7;\n text-decoration:
none;\n}\n\n\n\n'
$chart

jsHeader
'\n\n\n\n\n

Re: 0.9.0 - R tutorial - google vis - no output

2020-07-02 Thread Jeff Zhang 
It looks like a bug, I can reproduce this issue.

David Boyd  于2020年7月3日周五 上午7:43写道：

> All:
>
>   Sorry for dumping so much on the list lately.  Making progress but it is
> slow.
>
> So I finally got the %ir interpreter to work.
>
> Got pretty much every paragraph to work with either %r or %ir
> But I am not able to get any of the google vis outputs to generate
> any output.
>
> First question - is this because flash has basically been disabled across
> the board?
> I found
> If I look at say the bubble object from that paragrah it looks
> like it has real data:
>
> $type 'BubbleChart' $chartid 'BubbleChartID30605c24963' $html $header 
> ' html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"\n
> "https://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
> >\n "https://www.w3.org/1999/xhtml"; 
> >\n\nBubbleChartID30605c24963\n http-equiv="content-type" content="text/html;charset=utf-8" />\n type="text/css">\nbody {\n color: #44;\n font-family:
> Arial,Helvetica,sans-serif;\n font-size: 75%;\n }\n a {\n color: #4D87C7;\n
> text-decoration: none;\n}\n\n\n\n' $chart jsHeader '\n\n\n\n\n

Re: %r.ir vs %ir

2020-07-02 Thread David Boyd 

Jeff:

 mvn clean package -DskipTests -Pspark-2.4 -Phadoop2 -Pscala-2.11 
-Dcheckstyle.skip -Drat.skip=true


On 7/2/2020 7:22 PM, Jeff Zhang wrote:

What's your command of building zeppelin. ?

David Boyd mailto:db...@incadencecorp.com>> 
于2020年7月3日周五 上午6:59写道：


All:

  So with some wailing and knashing of teeth, I was able to build
the IRKernel from source
and install that into my R environment.

So the tutorial uses r.ir    -  If I run a paragraph
with that I get the below stack trace.

If I run with just %ir it works (for some paragraphs). It also
works for some paragraphs with %spark.ir 

Why the difference?

Running 0.9.0 built from source 2-3 days ago.



org.apache.zeppelin.interpreter.InterpreterException:
org.apache.zeppelin.interpreter.InterpreterException: Fail to
init SparkRBackend 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:
org.apache.zeppelin.interpreter.InterpreterException: Fail to
init SparkRBackend at
org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:99)
at

org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
... 8 more Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at

sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at

sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
org.apache.zeppelin.r.SparkRBackend.init(SparkRBackend.java:56)
at
org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:97)
... 9 more Caused by: java.lang.NoClassDefFoundError:
org/apache/hadoop/fs/FSDataInputStream at
org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76)
at org.apache.spark.SparkConf.(SparkConf.scala:71) at
org.apache.spark.SparkConf.(SparkConf.scala:58) at
org.apache.spark.api.r.RBackend.init(RBackend.scala:51) ... 15
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:418) at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at
java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 19 more


-- 
=mailto:db...@incadencecorp.com    

David W. Boyd
VP,  Data Solutions
10432 Balls Ford, Suite 240
Manassas, VA 20109
office:   +1-703-552-2862
cell: +1-703-402-7908
==http://www.incadencecorp.com/  
  
ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
Chair INCITS TG Big Data
Co-chair NIST Big Data Public Working Group Reference Architecture
First Robotic Mentor - FRC, FTC -www.iliterobotics.org  

Board Member- USSTEM Foundation -www.usstem.org  

The information contained in this message may be privileged
and/or confidential and protected from disclosure.
If the reader of this message is not the intended recipient
or an employee or agent responsible for delivering this message
to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication
is strictly prohibited.  If you have received this communication
in error, please notify the sender immediately by replying to
this message and deleting the material from any computer.



--
Best Regards

Jeff Zhang


--
= mailto:db...@incadencecorp.com 
David W. Boyd
VP,  Data Solutions
10432 Balls Ford, Suite 240
Manassas, VA 20109
office:   +1-703-552-2862
cell: +1-703-402-7908
== http://www.incadencecorp.com/ 
ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
Chair INCITS TG Big Data
Co-chair NIST Big Data Public Working Group Reference Architecture
First Robotic Mentor - FRC, FTC - www.iliterobotics.

0.9.0 - R tutorial - google vis - no output

2020-07-02 Thread David Boyd 

All:

  Sorry for dumping so much on the list lately.  Making progress but it 
is slow.


So I finally got the %ir interpreter to work.

Got pretty much every paragraph to work with either %r or %ir
But I am not able to get any of the google vis outputs to generate
any output.

First question - is this because flash has basically been disabled 
across the board?

I found
If I look at say the bubble object from that paragrah it looks
like it has real data:


$type
'BubbleChart'
$chartid
'BubbleChartID30605c24963'
$html

$header
'https://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>\nhttps://www.w3.org/1999/xhtml";>\n\nBubbleChartID30605c24963\n\n\nbody {\n color: #44;\n
font-family: Arial,Helvetica,sans-serif;\n font-size: 75%;\n
}\n a {\n color: #4D87C7;\n text-decoration:
none;\n}\n\n\n\n'
$chart

jsHeader
'\n\n\n\n\n

Re: %r.ir vs %ir

2020-07-02 Thread Jeff Zhang 
What's your command of building zeppelin. ?

David Boyd  于2020年7月3日周五 上午6:59写道：

> All:
>
>   So with some wailing and knashing of teeth, I was able to build the
> IRKernel from source
> and install that into my R environment.
>
> So the tutorial uses r.ir   -  If I run a paragraph with that I get the
> below stack trace.
>
> If I run with just %ir it works (for some paragraphs).  It also works for
> some paragraphs with %spark.ir
>
> Why the difference?
>
> Running 0.9.0 built from source 2-3 days ago.
>
>
> org.apache.zeppelin.interpreter.InterpreterException:
> org.apache.zeppelin.interpreter.InterpreterException: Fail to init
> SparkRBackend 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:
> org.apache.zeppelin.interpreter.InterpreterException: Fail to init
> SparkRBackend at
> org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:99) at
> org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70)
> ... 8 more Caused by: java.lang.reflect.InvocationTargetException at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498) at
> org.apache.zeppelin.r.SparkRBackend.init(SparkRBackend.java:56) at
> org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:97) ... 9 more
> Caused by: java.lang.NoClassDefFoundError:
> org/apache/hadoop/fs/FSDataInputStream at
> org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76) at
> org.apache.spark.SparkConf.(SparkConf.scala:71) at
> org.apache.spark.SparkConf.(SparkConf.scala:58) at
> org.apache.spark.api.r.RBackend.init(RBackend.scala:51) ... 15 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:418) at
> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 19 more
>
>
> --
> = mailto:db...@incadencecorp.com  
> 
> David W. Boyd
> VP,  Data Solutions
> 10432 Balls Ford, Suite 240
> Manassas, VA 20109
> office:   +1-703-552-2862
> cell: +1-703-402-7908
> == http://www.incadencecorp.com/ 
> ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
> Chair INCITS TG Big Data
> Co-chair NIST Big Data Public Working Group Reference Architecture
> First Robotic Mentor - FRC, FTC - www.iliterobotics.org
> Board Member- USSTEM Foundation - www.usstem.org
>
> The information contained in this message may be privileged
> and/or confidential and protected from disclosure.
> If the reader of this message is not the intended recipient
> or an employee or agent responsible for delivering this message
> to the intended recipient, you are hereby notified that any
> dissemination, distribution or copying of this communication
> is strictly prohibited.  If you have received this communication
> in error, please notify the sender immediately by replying to
> this message and deleting the material from any computer.
>
>

-- 
Best Regards

Jeff Zhang

%r.ir vs %ir

2020-07-02 Thread David Boyd 

All:

  So with some wailing and knashing of teeth, I was able to build the 
IRKernel from source

and install that into my R environment.

So the tutorial uses r.ir   -  If I run a paragraph with that I get the 
below stack trace.


If I run with just %ir it works (for some paragraphs).  It also works 
for some paragraphs with %spark.ir


Why the difference?

Running 0.9.0 built from source 2-3 days ago.


org.apache.zeppelin.interpreter.InterpreterException: 
org.apache.zeppelin.interpreter.InterpreterException: Fail to init 
SparkRBackend 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: 
org.apache.zeppelin.interpreter.InterpreterException: Fail to init 
SparkRBackend at 
org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:99) at 
org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:70) 
... 8 more Caused by: java.lang.reflect.InvocationTargetException at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:498) at 
org.apache.zeppelin.r.SparkRBackend.init(SparkRBackend.java:56) at 
org.apache.zeppelin.r.IRInterpreter.open(IRInterpreter.java:97) ... 9 
more Caused by: java.lang.NoClassDefFoundError: 
org/apache/hadoop/fs/FSDataInputStream at 
org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:76) 
at org.apache.spark.SparkConf.(SparkConf.scala:71) at 
org.apache.spark.SparkConf.(SparkConf.scala:58) at 
org.apache.spark.api.r.RBackend.init(RBackend.scala:51) ... 15 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:418) at 
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) at 
java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 19 more


--
= mailto:db...@incadencecorp.com 
David W. Boyd
VP,  Data Solutions
10432 Balls Ford, Suite 240
Manassas, VA 20109
office:   +1-703-552-2862
cell: +1-703-402-7908
== http://www.incadencecorp.com/ 
ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
Chair INCITS TG Big Data
Co-chair NIST Big Data Public Working Group Reference Architecture
First Robotic Mentor - FRC, FTC - www.iliterobotics.org
Board Member- USSTEM Foundation - www.usstem.org

The information contained in this message may be privileged
and/or confidential and protected from disclosure.
If the reader of this message is not the intended recipient
or an employee or agent responsible for delivering this message
to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication
is strictly prohibited.  If you have received this communication
in error, please notify the sender immediately by replying to
this message and deleting the material from any computer.

Plotting in plain R interpreter generates no output or error

2020-07-02 Thread David Boyd 

All:

  So this is a followup to a prior question.  I am running 0.9.0 built 
2 days ago from source.
I can not run the IR interpreter because there is no version of it for R 
3.6 and I can not downgrade R.

So in the straight %r interpreter I am trying to get plotting to work.
I am running on a secure server as a daemon under a zeppelin user .
The user has a home directory and permissions.
In the R tutorial the google vis paragraphs do not produce
any output:


%r

library(googleVis)
df=data.frame(country=c("US", "GB", "BR"),
  val1=c(10,13,14),
  val2=c(23,12,32))
Bar <- gvisBarChart(df)
print(Bar, tag = 'chart')


The straight plotting paragrahs:


%r
pairs(iris)

Product this error:
Error in value[[3L]](cond): could not open file 
'figure/unnamed-chunk-1-1.png'


I have tried setting the working directory to the home dir and I can 
view the

contents but get the same error.

I have looked through the source code and simply have no idea where this 
process is running or where it is trying to write out the image


My end customer for this effort is really into R so the ability to 
produce graphs in Zeppelin in R is critical.


I welcome ANY suggestion on how to demonstrate graphs/plots.



--
= mailto:db...@incadencecorp.com 
David W. Boyd
VP,  Data Solutions
10432 Balls Ford, Suite 240
Manassas, VA 20109
office:   +1-703-552-2862
cell: +1-703-402-7908
== http://www.incadencecorp.com/ 
ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
Chair INCITS TG Big Data
Co-chair NIST Big Data Public Working Group Reference Architecture
First Robotic Mentor - FRC, FTC - www.iliterobotics.org
Board Member- USSTEM Foundation - www.usstem.org

The information contained in this message may be privileged
and/or confidential and protected from disclosure.
If the reader of this message is not the intended recipient
or an employee or agent responsible for delivering this message
to the intended recipient, you are hereby notified that any
dissemination, distribution or copying of this communication
is strictly prohibited.  If you have received this communication
in error, please notify the sender immediately by replying to
this message and deleting the material from any computer.

spark.jars.packages not working in spark interpreter tutorial

2020-07-02 Thread David Boyd 

All:

   Trying to run the Spark Interpreter tutorial note.

The spark.conf paragraph which specifies spark.jars.packages runs clean.
But the next paragraph which tries to use the avro jar fails with a 
class not found for


org.apache.spark.sql.avro.AvroFileFormat.DefaultSource

Spark is set to run Per Note in scoped process.

There are no errors in the 
zeppelin-interpreter-spark-shared_process-zeppelin-dspcnode11.dspc.incadencecorp.com.log


Any thoughts would be appreciated.

Note Spark Basic Features tutorial works fine.


The base zeppelin log has this error:

 INFO [2020-07-02 15:57:58,339] ({qtp923219673-142} 
VFSNotebookRepo.java[save]:145) - Saving note 2F8KN6TKK to Spark 
Tutorial/1. Spark Interpreter Introduction_2F8KN6TKK.zpln
 INFO [2020-07-02 15:57:58,343] ({SchedulerFactory3} 
AbstractScheduler.java[runJob]:125) - Job 20180530-222838_1995256600 
started by scheduler RemoteInterpreter-spark-shared_process-2F8KN6TKK
 INFO [2020-07-02 15:57:58,343] ({SchedulerFactory3} 
Paragraph.java[jobRun]:388) - Run paragraph [paragraph_id: 
20180530-222838_1995256600, interpreter: 
org.apache.zeppelin.spark.SparkInterpreter, note_id: 2F8KN6TKK, user: 
dspc_demo]
 INFO [2020-07-02 15:57:58,444] 
({JobStatusPoller-20180530-222838_1995256600} 
NotebookServer.java[onStatusChange]:1927) - Job 
20180530-222838_1995256600 starts to RUNNING
 INFO [2020-07-02 15:57:58,445] 
({JobStatusPoller-20180530-222838_1995256600} 
VFSNotebookRepo.java[save]:145) - Saving note 2F8KN6TKK to Spark 
Tutorial/1. Spark Interpreter Introduction_2F8KN6TKK.zpln
 WARN [2020-07-02 15:57:58,734] ({SchedulerFactory3} 
NotebookServer.java[onStatusChange]:1924) - Job 
20180530-222838_1995256600 is finished, status: ERROR, exception: 
null, result: %text java.lang.ClassNotFoundException: Failed to find 
data source: org.apache.spark.sql.avro.AvroFileFormat. Please find 
packages at http://spark.apache.org/third-party-projects.html
  at 
org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:657)

  at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:194)
  at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178)
  ... 45 elided
Caused by: java.lang.ClassNotFoundException: 
org.apache.spark.sql.avro.AvroFileFormat.DefaultSource
  at 
scala.reflect.internal.util.AbstractFileClassLoader.findClass(AbstractFileClassLoader.scala:62)

  at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
  at 
org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20$$anonfun$apply$12.apply(DataSource.scala:634)
  at 
org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20$$anonfun$apply$12.apply(DataSource.scala:634)

  at scala.util.Try$.apply(Try.scala:192)
  at 
org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20.apply(DataSource.scala:634)
  at 
org.apache.spark.sql.execution.datasources.DataSource$$anonfun$20.apply(DataSource.scala:634)

  at scala.util.Try.orElse(Try.scala:84)
  at 
org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:634)

  ... 47 more

 INFO [2020-07-02 15:57:58,735] ({SchedulerFactory3} 
VFSNotebookRepo.java[save]:145) - Saving note 2F8KN6TKK to Spark 
Tutorial/1. Spark Interpreter Introduction_2F8KN6TKK.zpln



--
= mailto:db...@incadencecorp.com 
David W. Boyd
VP,  Data Solutions
10432 Balls Ford, Suite 240
Manassas, VA 20109
office:   +1-703-552-2862
cell: +1-703-402-7908
== http://www.incadencecorp.com/ 
ISO/IEC JTC1 SC42/WG2, editor ISO/IEC 20546, ISO/IEC 20547-1
Chair INCITS TG Big Data
Co-chair NIST Big Data Public Working Group Reference Architecture
First Robotic Mentor - FRC, FTC - www.iliterobotics.org
Board Member- USSTEM Foundation - www.usstem.org

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