Spark 2.4.3 with hadoop 3.2 docker image.

[José Luis Pedrosa <jl...@gmail.com>]

Hi All

I'm trying to create docker images that can access azure services using
abfs hadoop driver, which is only available in haddop 3.2.

So I downloaded spark without Hadoop and generated spark images using the
docker-image-tool.sh  itself.

In a new image using the resulting image as FROM, I've added hadoop 3.2
binary distro and following
https://spark.apache.org/docs/2.2.0/hadoop-provided.html I've set:

export SPARK_DIST_CLASSPATH=$(/path/to/hadoop/bin/hadoop classpath)


Then when launching the jobs in K8s, it turns out, that the driver uses
internally spark-submit for the driver
<https://github.com/apache/spark/blob/c3e32bf06c35ba2580d46150923abfa795b4446a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh#L89>
but
it seems that launches with java directly for the executor
<https://github.com/apache/spark/blob/c3e32bf06c35ba2580d46150923abfa795b4446a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh#L111>
Result is that drivers can run correctly, but executors fails due to
missing sl4j class

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/Logger
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.slf4j.Logger
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)


If I'd add it manually to the class path, then another hadoop class would
be missing.

What is the right way to generate a docker image for spark 2.4 with a
custom hadoop distribution?


Thanks and regards
JL

Re: Spark 2.4.3 with hadoop 3.2 docker image.

[Julien Laurenceau <ju...@pepitedata.com>]

Hi
Did you try using the image build by mesosphere ?
I am not sure they already build the combo 2.4 / 3.2 but they provide a
project on github that Can be used to generate tour custom combo. It is
named mesosphere/spark-build
Regards

Le jeu. 4 juil. 2019 à 19:13, José Luis Pedrosa <jl...@gmail.com> a
écrit :

> Hi All
>
> I'm trying to create docker images that can access azure services using
> abfs hadoop driver, which is only available in haddop 3.2.
>
> So I downloaded spark without Hadoop and generated spark images using the
> docker-image-tool.sh  itself.
>
> In a new image using the resulting image as FROM, I've added hadoop 3.2
> binary distro and following
> https://spark.apache.org/docs/2.2.0/hadoop-provided.html I've set:
>
> export SPARK_DIST_CLASSPATH=$(/path/to/hadoop/bin/hadoop classpath)
>
>
> Then when launching the jobs in K8s, it turns out, that the driver uses
> internally spark-submit for the driver
> <https://github.com/apache/spark/blob/c3e32bf06c35ba2580d46150923abfa795b4446a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh#L89> but
> it seems that launches with java directly for the executor
> <https://github.com/apache/spark/blob/c3e32bf06c35ba2580d46150923abfa795b4446a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/entrypoint.sh#L111>
> Result is that drivers can run correctly, but executors fails due to
> missing sl4j class
>
> Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/Logger
> at java.lang.Class.getDeclaredMethods0(Native Method)
> at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
> at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
> at java.lang.Class.getMethod0(Class.java:3018)
> at java.lang.Class.getMethod(Class.java:1784)
> at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
> at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
> Caused by: java.lang.ClassNotFoundException: org.slf4j.Logger
> at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>
>
> If I'd add it manually to the class path, then another hadoop class would
> be missing.
>
> What is the right way to generate a docker image for spark 2.4 with a
> custom hadoop distribution?
>
>
> Thanks and regards
> JL
>