[PIG-3830] HiveColumnarLoader throwing FileNotFoundException on Hadoop 2

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.12.0
• Fix Version/s: 0.18.0
• Assignee: Unassigned
• Reporter: Jarek Jarcec Cecho
• Created: 24/Mar/14 02:19
• Updated: 26/May/17 22:35

Description

I've noticed that HiveColumnarLoader will thrown java.io.FileNotFoundException when used with glob path on Hadoop 2.0. It will run just fine on Hadoop 1.0:

Failed to parse: java.io.FileNotFoundException: File /home/jarcec/cloudera/repos/pig/contrib/piggybank/java/simpleDataDir1395623312698/*.txt does not exist
	at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:198)
	at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1676)
	at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1623)
	at org.apache.pig.PigServer.registerQuery(PigServer.java:575)
	at org.apache.pig.PigServer.registerQuery(PigServer.java:588)
	at org.apache.pig.piggybank.test.storage.TestHiveColumnarLoader.testHdfdsGlobbing(TestHiveColumnarLoader.java:220)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at junit.framework.TestCase.runTest(TestCase.java:176)
	at junit.framework.TestCase.runBare(TestCase.java:141)
	at junit.framework.TestResult$1.protect(TestResult.java:122)
	at junit.framework.TestResult.runProtected(TestResult.java:142)
	at junit.framework.TestResult.run(TestResult.java:125)
	at junit.framework.TestCase.run(TestCase.java:129)
	at junit.framework.TestSuite.runTest(TestSuite.java:255)
	at junit.framework.TestSuite.run(TestSuite.java:250)
	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)
	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052)
	at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:906)
Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: File /home/jarcec/cloudera/repos/pig/contrib/piggybank/java/simpleDataDir1395623312698/*.txt does not exist
	at org.apache.hadoop.fs.RawLocalFileSystem.listStatus(RawLocalFileSystem.java:362)
	at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1484)
	at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1524)
	at org.apache.hadoop.fs.ChecksumFileSystem.listStatus(ChecksumFileSystem.java:564)
	at org.apache.pig.piggybank.storage.partition.PathPartitioner.getPartitionKeys(PathPartitioner.java:105)
	at org.apache.pig.piggybank.storage.partition.PathPartitionHelper.getPartitionKeys(PathPartitionHelper.java:101)
	at org.apache.pig.piggybank.storage.HiveColumnarLoader.getPartitionColumns(HiveColumnarLoader.java:576)
	at org.apache.pig.piggybank.storage.HiveColumnarLoader.getSchema(HiveColumnarLoader.java:646)
	at org.apache.pig.newplan.logical.relational.LOLoad.getSchemaFromMetaData(LOLoad.java:175)
	at org.apache.pig.newplan.logical.relational.LOLoad.<init>(LOLoad.java:89)
	at org.apache.pig.parser.LogicalPlanBuilder.buildLoadOp(LogicalPlanBuilder.java:853)
	at org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerator.java:3479)
	at org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1536)
	at org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:1013)
	at org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:553)
	at org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:421)
	at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:188)
	... 20 more
Caused by: java.io.FileNotFoundException: File /home/jarcec/cloudera/repos/pig/contrib/piggybank/java/simpleDataDir1395623312698/*.txt does not exist
	... 37 more

I've dived into the problem and found a difference in Hadoop implementation of DistributedFileSystem. For non existing directory method listStatus will return null in Hadoop 1:

    if (thisListing == null) { // the directory does not exist
      return null;
    }

But will thrown an exception in Hadoop 2:

    if (thisListing == null) { // the directory does not exist
      throw new FileNotFoundException("File " + p + " does not exist.");
    }

Issue Links

• links to: Review request