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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