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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-14869) Make ORC Reader resilient to 0 length files
Date Fri, 30 Sep 2016 20:27:20 GMT
Prasanth Jayachandran created HIVE-14869:
--------------------------------------------

             Summary: Make ORC Reader resilient to 0 length files
                 Key: HIVE-14869
                 URL: https://issues.apache.org/jira/browse/HIVE-14869
             Project: Hive
          Issue Type: Bug
          Components: Reader
    Affects Versions: 1.2.1
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran


Orc reader will throw IndexOutOfBounds if used directly. Following is the exception
{code}
Caused by: java.lang.IndexOutOfBoundsException
	at java.nio.Buffer.checkIndex(Buffer.java:540)
	at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:139)
	at org.apache.orc.impl.ReaderImpl.extractFileTail(ReaderImpl.java:515)
	at org.apache.orc.impl.ReaderImpl.<init>(ReaderImpl.java:368)
	at org.apache.orc.OrcFile.createReader(OrcFile.java:222)
	at org.apache.orc.TestReader.testReadZeroLengthFile(TestReader.java:57)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:19)
	... 22 more

{code}

Input format usually avoids such files but not generating splits but if someone uses the Reader
directly on invalid files it should be resilient too. OrcOutputFormat will not create a 0
length so this shouldn't be a problem for files written by Orc itself.



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