KurtYoung commented on a change in pull request #10170: [FLINK-14722][hadoop] Optimize mapred.HadoopInputSplit to not serialize conf when split is not configurable URL: https://github.com/apache/flink/pull/10170#discussion_r349455337
########## File path: flink-connectors/flink-hadoop-compatibility/src/main/java/org/apache/flink/api/java/hadoop/mapred/wrapper/HadoopInputSplit.java ########## @@ -103,23 +109,28 @@ private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundE // read the parent fields and the final fields in.defaultReadObject(); - // the job conf knows how to deserialize itself - jobConf = new JobConf(); - jobConf.readFields(in); - try { hadoopInputSplit = (org.apache.hadoop.mapred.InputSplit) WritableFactories.newInstance(splitType); - } - catch (Exception e) { + } catch (Exception e) { throw new RuntimeException("Unable to instantiate Hadoop InputSplit", e); } - if (hadoopInputSplit instanceof Configurable) { - ((Configurable) hadoopInputSplit).setConf(this.jobConf); - } - else if (hadoopInputSplit instanceof JobConfigurable) { - ((JobConfigurable) hadoopInputSplit).configure(this.jobConf); + if (isConfigurable(hadoopInputSplit)) { + // the job conf knows how to deserialize itself + jobConf = new JobConf(); + jobConf.readFields(in); + + if (hadoopInputSplit instanceof Configurable) { + ((Configurable) hadoopInputSplit).setConf(this.jobConf); Review comment: Is it ok to `conf` this `hadoopInputSplit` before `hadoopInputSplit.readFields(in)`? Looks dangerous to me. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services