[MAPREDUCE-7325] Intermediate data encryption is broken in LocalJobRunner

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.4.0, 3.3.1, 2.10.2, 3.2.3
• Component/s: job submission, security
• Assignee: Ahmed Hussein
• Reporter: Ahmed Hussein
• Created: 25/Feb/21 15:42
• Updated: 10/Jun/21 08:10
• Resolved: 22/Mar/21 20:55

Description

With enabling intermediate encryption, running a job using LocalJobRunner with multiple reducers fails with the following error:

 

2021-02-23 18:18:05,145 WARN  [Thread-2381] mapred.LocalJobRunner (LocalJobRunner.java:run(590)) - job_local1344328673_0004
java.lang.Exception: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in localfetcher#5
	at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:492)
	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:559)
Caused by: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in localfetcher#5
	at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:136)
	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:377)
	at org.apache.hadoop.mapred.LocalJobRunner$Job$ReduceTaskRunnable.run(LocalJobRunner.java:347)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.hadoop.fs.ChecksumException: Checksum Error
	at org.apache.hadoop.mapred.IFileInputStream.doRead(IFileInputStream.java:229)
	at org.apache.hadoop.mapred.IFileInputStream.read(IFileInputStream.java:153)
	at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:210)
	at org.apache.hadoop.mapreduce.task.reduce.InMemoryMapOutput.doShuffle(InMemoryMapOutput.java:91)
	at org.apache.hadoop.mapreduce.task.reduce.IFileWrappedMapOutput.shuffle(IFileWrappedMapOutput.java:63)
	at org.apache.hadoop.mapreduce.task.reduce.LocalFetcher.copyMapOutput(LocalFetcher.java:156)
	at org.apache.hadoop.mapreduce.task.reduce.LocalFetcher.doCopy(LocalFetcher.java:103)
	at org.apache.hadoop.mapreduce.task.reduce.LocalFetcher.run(LocalFetcher.java:86)

The bug can be reproduced with any test unit like TestLocalJobSubmission.

Another way to reproduce the bug is to run LargeSorter with multiple reducers.

Configuration config = new Configuration();
// set all the necessary configurations
config.setInt(LargeSorter.NUM_REDUCE_TASKS,2);
String[] args = new String[] {"output-dir"};
int res = ToolRunner.run(config, new LargeSorter(), args);

Issue Links

• is related to: MAPREDUCE-7322 revisiting TestMRIntermediateDataEncryption