apache-spark How to ask Apache Spark related question? Diagnostic information
Example
Debugging questions.
When question is related to debugging specific exception always provide relevant traceback. While it is advisable to remove duplicated outputs (from different executors or attempts) don't cut tracebacks to a single line or exception class only.
Performance questions.
Depending on the context try to provide details like:
RDD.debugString/Dataset.explain.- Output from Spark UI with DAG diagram if applicable in particular case.
- Relevant log messages.
- Diagnostic information collected by external tools (Ganglia, VisualVM).
