David Phillips created HIVE-3569:
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             Summary: RCFile requires native Hadoop library
                 Key: HIVE-3569
                 URL: https://issues.apache.org/jira/browse/HIVE-3569
             Project: Hive
          Issue Type: Bug
    Affects Versions: 0.10.0
            Reporter: David Phillips


RCFile requires the native Hadoop library. It does not work when using the Java 
{{GzipCodec}}.

The root cause is that the two versions of {{GzipCodec.createInputStream()}} 
work differently. The native version simply saves a reference to the supplied 
input stream. The Java version wraps the stream in a Java {{GZIPInputStream}}, 
which immediately tries to read the header.

The problem occurs because the stream passed by the {{RCFile.ValueBuffer}} 
constructor is empty (the buffer backing the stream is still empty at that 
point).

{noformat}
12/10/11 10:37:25 WARN util.NativeCodeLoader: Unable to load native-hadoop 
library for your platform... using builtin-java classes where applicable
12/10/11 10:37:25 INFO io.CodecPool: Got brand-new decompressor
12/10/11 10:37:25 INFO io.CodecPool: Got brand-new decompressor
Exception in thread "main" java.io.EOFException
        at java.util.zip.GZIPInputStream.readUByte(GZIPInputStream.java:264)
        at java.util.zip.GZIPInputStream.readUShort(GZIPInputStream.java:254)
        at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:163)
        at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:78)
        at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:90)
        at 
org.apache.hadoop.io.compress.GzipCodec$GzipInputStream$ResetableGZIPInputStream.<init>(GzipCodec.java:92)
        at 
org.apache.hadoop.io.compress.GzipCodec$GzipInputStream.<init>(GzipCodec.java:101)
        at 
org.apache.hadoop.io.compress.GzipCodec.createInputStream(GzipCodec.java:169)
        at 
org.apache.hadoop.io.compress.GzipCodec.createInputStream(GzipCodec.java:179)
        at 
org.apache.hadoop.hive.ql.io.RCFile$ValueBuffer.<init>(RCFile.java:451)
        at org.apache.hadoop.hive.ql.io.RCFile$Reader.<init>(RCFile.java:1205)
        at org.apache.hadoop.hive.ql.io.RCFile$Reader.<init>(RCFile.java:1111)
        at 
org.apache.hadoop.hive.ql.io.RCFileRecordReader.<init>(RCFileRecordReader.java:52)
{noformat}

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