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spark-instrumented-optimizer/docs/core-migration-guide.md
Marcelo Vanzin 56a0b5421e [SPARK-29399][CORE] Remove old ExecutorPlugin interface 
SPARK-29397 added new interfaces for creating driver and executor
plugins. These were added in a new, more isolated package that does
not pollute the main o.a.s package.

The old interface is now redundant. Since it's a DeveloperApi and
we're about to have a new major release, let's remove it instead of
carrying more baggage forward.

Closes #26390 from vanzin/SPARK-29399.

Authored-by: Marcelo Vanzin <vanzin@cloudera.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
2019-11-13 09:52:40 +09:00

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global Migration Guide: Spark Core Migration Guide: Spark Core Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
  • Table of contents {:toc}

Upgrading from Core 2.4 to 3.0

  • The org.apache.spark.ExecutorPlugin interface 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.

  • Deprecated method TaskContext.isRunningLocally has been removed. Local execution was removed and it always has returned false.

  • Deprecated method shuffleBytesWritten, shuffleWriteTime and shuffleRecordsWritten in ShuffleWriteMetrics have been removed. Instead, use bytesWritten, writeTime and recordsWritten respectively.

  • Deprecated method AccumulableInfo.apply have been removed because creating AccumulableInfo is disallowed.

  • 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.