Hi all,
I have followed the steps in this notebook to install rasterframes on my databricks cluster.
Eventually I am able to import the following:
from pyrasterframes import rf_ipython
from pyrasterframes.utils import create_rf_spark_session
from pyspark.sql.functions import lit
from pyrasterframes.rasterfunctions import *
But when I run:
spark = create_rf_spark_session()
I get the following error: "java.lang.NoClassDefFoundError: scala/Product$class".
I am using a cluster with Spark 3.2.1. I also installed Java Runtime Environment 1.8.0_341, but this made no difference.
Could someone explain what went wrong? And how to solve this error?
The full error log:
---------------------------------------------------------------------------
Py4JJavaError Traceback (most recent call last)
<command-2354681519525034> in <module>
5
6 # Use the provided convenience function to create a basic local SparkContext
----> 7 spark = create_rf_spark_session()
/databricks/python/lib/python3.8/site-packages/pyrasterframes/utils.py in create_rf_spark_session(master, **kwargs)
97
98 try:
---> 99 spark.withRasterFrames()
100 return spark
101 except TypeError as te:
/databricks/python/lib/python3.8/site-packages/pyrasterframes/__init__.py in _rf_init(spark_session)
42 """ Adds RasterFrames functionality to PySpark session."""
43 if not hasattr(spark_session, "rasterframes"):
---> 44 spark_session.rasterframes = RFContext(spark_session)
45 spark_session.sparkContext._rf_context = spark_session.rasterframes
46
/databricks/python/lib/python3.8/site-packages/pyrasterframes/rf_context.py in __init__(self, spark_session)
37 self._jvm = self._gateway.jvm
38 jsess = self._spark_session._jsparkSession
---> 39 self._jrfctx = self._jvm.org.locationtech.rasterframes.py.PyRFContext(jsess)
40
41 def list_to_seq(self, py_list):
/databricks/spark/python/lib/py4j-0.10.9.1-src.zip/py4j/java_gateway.py in __call__(self, *args)
1566
1567 answer = self._gateway_client.send_command(command)
-> 1568 return_value = get_return_value(
1569 answer, self._gateway_client, None, self._fqn)
1570
/databricks/spark/python/pyspark/sql/utils.py in deco(*a, **kw)
115 def deco(*a, **kw):
116 try:
--> 117 return f(*a, **kw)
118 except py4j.protocol.Py4JJavaError as e:
119 converted = convert_exception(e.java_exception)
/databricks/spark/python/lib/py4j-0.10.9.1-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
324 value = OUTPUT_CONVERTER[type](answer[2:], gateway_client)
325 if answer[1] == REFERENCE_TYPE:
--> 326 raise Py4JJavaError(
327 "An error occurred while calling {0}{1}{2}.\n".
328 format(target_id, ".", name), value)
Py4JJavaError: An error occurred while calling None.org.locationtech.rasterframes.py.PyRFContext.
: java.lang.NoClassDefFoundError: scala/Product$class
at org.locationtech.rasterframes.model.TileDimensions.<init>(TileDimensions.scala:35)
at org.locationtech.rasterframes.package$.<init>(rasterframes.scala:55)
at org.locationtech.rasterframes.package$.<clinit>(rasterframes.scala)
at org.locationtech.rasterframes.py.PyRFContext.<init>(PyRFContext.scala:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:380)
at py4j.Gateway.invoke(Gateway.java:250)
at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)
at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)
at py4j.GatewayConnection.run(GatewayConnection.java:251)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: scala.Product$class
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
at com.databricks.backend.daemon.driver.ClassLoaders$LibraryClassLoader.loadClass(ClassLoaders.scala:151)
at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
... 15 more
Many thanks in advance!
