Yes. Besides, if you change the "T : Encoder" to "T", it OK too.
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if I remove this abstract class A[T : Encoder] {} it's ok!
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spark standalone cluster
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do you run this on yarn mode or else?
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maybe you can use dataframe ,with the header file as a schema
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Besides, if you replace line #14 with:
Env.spark.createDataset(Seq("a","b","c")).rdd.map(func).collect()
You will have the same problem with a different stack trace:
Caused by: java.lang.NoClassDefFoundError: Could not initialize class Main$
at Main$$anonfun$main$1.apply(test.scala:14)
Hi,
I'm surprised too. Here's the entire stack trace for reference. I'd
also like to know what causes the issue.
Caused by: java.lang.NoClassDefFoundError: Could not initialize class Main$
at Main$$anonfun$main$1.apply(test.scala:14)
at Main$$anonfun$main$1.apply(test.scala:14)
at
Hi Sean,
Thanks a lot for help understanding the different jars.
Do you think there's anything that should be reported as an
enhancement/issue/task in JIRA?
Pozdrawiam,
Jacek Laskowski
https://medium.com/@jaceklaskowski/
Mastering Apache Spark 2.0 http://bit.ly/mastering-apache-spark
No, these are different major versions of these components, each of
which gets used by something in the transitive dependency graph. They
are not redundant because they're not actually presenting roughly the
same component in the same namespace.
However the parquet-hadoop bit looks wrong, in that
Hi,
In my application, I got a weird error message:
java.lang.NoClassDefFoundError: Could not initialize class X
This happens only when I try to submit my application in cluster mode. It
works perfectly in client mode.
I'm able to reproduce this error message by a simple 16-line program:
Hi,
I have two separate csv files one with header and other with data. I read
those two files in 2 different RDDs and now I need to merge both the RDDs.
I tried various options such as union, zip, join but none worked for my
problem.
What is the best way to merge two RDDs so that the header and
Hi,
Just noticed in assembly/target/scala-2.11/jars that similar libraries
have different versions:
-rw-r--r-- 1 jacek staff 1230201 17 wrz 09:51 netty-3.8.0.Final.jar
-rw-r--r-- 1 jacek staff 2305335 17 wrz 09:51 netty-all-4.0.41.Final.jar
and
-rw-r--r-- 1 jacek staff218076 17
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