Migration Guide: Spark Core
Upgrading from Core 2.4 to 3.0
org.apache.spark.ExecutorPlugininterface and related configuration has been replaced with
org.apache.spark.plugin.SparkPlugin, which adds new functionality. Plugins using the old interface need to be modified to extend the new interfaces. Check the Monitoring guide for more details.
TaskContext.isRunningLocallyhas been removed. Local execution was removed and it always has returned
ShuffleWriteMetricshave been removed. Instead, use
AccumulableInfo.applyhave been removed because creating
Event log file will be written as UTF-8 encoding, and Spark History Server will replay event log files as UTF-8 encoding. Previously Spark writes event log file as default charset of driver JVM process, so Spark History Server of Spark 2.x is needed to read the old event log files in case of incompatible encoding.