[jira] [Created] (TEZ-4244) Consider using RawLocalFileSystem in LocalDiskFetchedInput

["Rajesh Balamohan (Jira)" <ji...@apache.org>]

Rajesh Balamohan created TEZ-4244:
-------------------------------------

             Summary: Consider using RawLocalFileSystem in LocalDiskFetchedInput
                 Key: TEZ-4244
                 URL: https://issues.apache.org/jira/browse/TEZ-4244
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Rajesh Balamohan


Using RawLocalFileSystem (LocalFSFileInputStream) should avoid the native FS call for seek() and should be using just (pos < 0) condition.

 
{noformat}
"TezTR-348763_0_9_6_172_0" #68186 daemon prio=5 os_prio=0 tid=0x000055d7afbce800 nid=0x3877 runnable [0x00007f645019c000]
   java.lang.Thread.State: RUNNABLE
	at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
	at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:242)
	at java.io.File.exists(File.java:821)
	at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:646)
	at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:939)
	at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:640)
	at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:456)
	at org.apache.hadoop.fs.FileSystem.getContentSummary(FileSystem.java:1781)
	at org.apache.hadoop.fs.ChecksumFileSystem$FSDataBoundedInputStream.getFileLength(ChecksumFileSystem.java:294)
	at org.apache.hadoop.fs.ChecksumFileSystem$FSDataBoundedInputStream.seek(ChecksumFileSystem.java:337)
	- locked <0x00007f9f10196f00> (a org.apache.hadoop.fs.ChecksumFileSystem$FSDataBoundedInputStream)
	at org.apache.tez.runtime.library.common.shuffle.LocalDiskFetchedInput.getInputStream(LocalDiskFetchedInput.java:73)
	at org.apache.tez.runtime.library.common.readers.UnorderedKVReader.openIFileReader(UnorderedKVReader.java:226)
	at org.apache.tez.runtime.library.common.readers.UnorderedKVReader.moveToNextInput(UnorderedKVReader.java:212)
	at org.apache.tez.runtime.library.common.readers.UnorderedKVReader.next(UnorderedKVReader.java:125)
	at org.apache.hadoop.hive.ql.exec.vector.mapjoin.fast.VectorMapJoinFastHashTableLoader.load(VectorMapJoinFastHashTableLoader.java:144)
	at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTableInternal(MapJoinOperator.java:386)
	at org.apache.hadoop.hive.ql.exec.MapJoinOperator.loadHashTable(MapJoinOperator.java:455)
	at org.apache.hadoop.hive.ql.exec.MapJoinOperator.initializeOp(MapJoinOperator.java:242)
	at org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinCommonOperator.initializeOp(VectorMapJoinCommonOperator.java:555)
	at org.apache.hadoop.hive.ql.exec.vector.mapjoin.VectorMapJoinGenerateResultOperator.initializeOp(VectorMapJoinGenerateResultOperator.java:111)
	at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:375)
	at org.apache.hadoop.hive.ql.exec.tez.ReduceRecordProcessor.init(ReduceRecordProcessor.java:193)
	at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:266)
	at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250)
	at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:374)
	at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:75)
	at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:62)
 {noformat}



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