pyspark – java.lang.ClassFormatError: Unknown constant tag 83 in class file org/apache/spark/ml/param/DoubleArrayParam Exception when uploading SparkModel to S3

We are running a Spark Job in our kubernetes cluster, in which we are trying to save a Spark PipelineModel to S3. When submitting the job with only 1 executor, everything works fine, but when using 2 or more executors the job fails with the following Error: 22/07/01 07:07:48 ERROR Instrumentation: org.apache.spark.SparkException: Job aborted due … Read more

c++ – tuple foreach, index, find: return compile-time constant during runtime

Tuple foreach is relatively simple using either recursion or std::apply: #include <cstring> #include <iostream> #include <tuple> #include <utility> template<typename F, typename T> auto foreach_apply(F&& f, T &&t) { return std::apply([&f](auto&&… elements) { return (f(std::forward<decltype(elements)>(elements)) || …); }, std::forward<T> } template <std::size_t I=0, typename F, typename… Ts> void foreach_recurse(F&& f, std::tuple<Ts…> t) { if constexpr (I … Read more