问题
I am trying to run a Python Flink Application on the standalone Flink cluster. The application works fine on a single node cluster but it throws the following error on a multi-node cluster. java.lang.Exception: The user defined 'open()' method caused an exception: An error occurred while copying the file. Please help me resolve this problem. Thank you
The application I am trying to execute has the following code.
from flink.plan.Environment import get_environment
from flink.plan.Constants import INT, STRING, WriteMode
env = get_environment()
data = env.from_elements("Hello")
data.map(lambda x: list(x)).output()
env.execute()
回答1:
You have to configure "python.dc.tmp.dir" in "flink-conf.yaml" to point to a distributed filesystem (like HDFS). This directory is used to distributed the python scripts.
来源：https://stackoverflow.com/questions/49005505/unable-to-run-a-python-flink-application-on-cluster