Problems submitting Kafka library with pyspark

[Borja Garrido <bo...@cern.ch>]

Hi all,

I've a working version of Zeppelin with Spark 1.5.1, I'm using my own 
Spark build and not the one packaged with Zeppelin.

If I try streaming Kafka with Scala everything works just fine, however 
if I try it with Pyspark it just won't find the Utils library.

I'm using the SPARK_SUBMIT variable in zep-env.sh in order to load the 
kafka jar with --packages (as it is said in the Spark documentation), 
but always get the same error.

Py4JJavaError: An error occurred while calling o48.loadClass. : 
java.lang.ClassNotFoundException: 
org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper at 
java.net.URLClassLoader$1.run(URLClassLoader.java:366) at 
java.net.URLClassLoader$1.run(URLClassLoader.java:355) at 
java.security.AccessController.doPrivileged(Native Method) at 
java.net.URLClassLoader.findClass(URLClassLoader.java:354) at 
java.lang.ClassLoader.loadClass(ClassLoader.java:425) at 
java.lang.ClassLoader.loadClass(ClassLoader.java:358) at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:606) at 
py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231) at 
py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379) at 
py4j.Gateway.invoke(Gateway.java:259) at 
py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133) at 
py4j.commands.CallCommand.execute(CallCommand.java:79) at 
py4j.GatewayConnection.run(GatewayConnection.java:207) at 
java.lang.Thread.run(Thread.java:745)
Anyone else with a similar problem?

Thanks in advance
Borja

Re: Problems submitting Kafka library with pyspark

[moon soo Lee <mo...@apache.org>]

Hi Borja,

Thanks for sharing the issue. I could reproduce the problem.
So far, you can use %dep in the notebook instead of --packages in
zeppelin-env.sh as a workaround.

%dep
z.reset()
z.load("org.apache.spark:spark-streaming-kafka_2.10:1.5.1")

%pyspark
from pyspark.streaming.kafka import KafkaUtils
from pyspark.streaming import StreamingContext

ssc = StreamingContext(sc, ...)
kafkaStream = KafkaUtils.createStream(ssc, ...)


will work. I'll take a look why --packages does not work in pyspark.

Thanks,
moon

On Mon, Oct 12, 2015 at 9:08 AM Borja Garrido <bo...@cern.ch>
wrote:

> Hi all,
>
> I've a working version of Zeppelin with Spark 1.5.1, I'm using my own
> Spark build and not the one packaged with Zeppelin.
>
> If I try streaming Kafka with Scala everything works just fine, however if
> I try it with Pyspark it just won't find the Utils library.
>
> I'm using the SPARK_SUBMIT variable in zep-env.sh in order to load the
> kafka jar with --packages (as it is said in the Spark documentation), but
> always get the same error.
>
> Py4JJavaError: An error occurred while calling o48.loadClass. :
> java.lang.ClassNotFoundException:
> org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper at
> java.net.URLClassLoader$1.run(URLClassLoader.java:366) at
> java.net.URLClassLoader$1.run(URLClassLoader.java:355) at
> java.security.AccessController.doPrivileged(Native Method) at
> java.net.URLClassLoader.findClass(URLClassLoader.java:354) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:425) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:358) at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606) at
> py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231) at
> py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379) at
> py4j.Gateway.invoke(Gateway.java:259) at
> py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133) at
> py4j.commands.CallCommand.execute(CallCommand.java:79) at
> py4j.GatewayConnection.run(GatewayConnection.java:207) at
> java.lang.Thread.run(Thread.java:745)
> Anyone else with a similar problem?
>
> Thanks in advance
>
> Borja
>