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From Arun C Murthy <...@hortonworks.com>
Subject Re: Sqoop 1.4.1-cdh4.0.1 is not running in Hadoop 2.0.0-cdh4.1.1
Date Wed, 24 Oct 2012 14:14:45 GMT
Please ask CDH questions on CDH lists. 

On Oct 23, 2012, at 3:17 PM, Kartashov, Andy wrote:

> Guys tried for hours to resolve this error.
> I am trying to import a table to Hadoop using Sqoop.
> ERROR is:
> Error: org.hsqldb.DatabaseURL.parseURL(Ljava/lang/String;ZZ)Lorg/hsqldb/persist/HsqlProperties
> I realise that there is an issue with the versions of hsqldb.jar files
> At first, Sqoop was spitting above error until I realised that my /usr/lib/sqoop/lib
folder had both versions hsqldb- and just hsqldb.jar (2.0? I suppose), and sqoop-conf
was picking up the first (wrong jar).
> When I moved the hsqldb- away, Sqoop stopped complaining but them Hadoop
began spitting out the same error. No matter what I tried I could not get Hadoop to pick the
right jar.
> I tried setting:
> export HADOOP_CLASSPATH=”/usr/lib/sqoop/lib/hsqldb.jar” and then
> without luck..
> Please help.
> Thnks
> AK
> From: Jonathan Bishop [mailto:jbishop.rwc@gmail.com] 
> Sent: Tuesday, October 23, 2012 2:41 PM
> To: user@hadoop.apache.org
> Subject: Re: zlib does not uncompress gzip during MR run
> Just to follow up on my own question...
> I believe the problem is caused by the input split during MR. So my real question is
how to handle input splits when the input is gzipped.
> Is it even possible to have splits of a gzipped file?
> Thanks,
> Jon
> On Tue, Oct 23, 2012 at 11:10 AM, Jonathan Bishop <jbishop.rwc@gmail.com> wrote:
> Hi,
> My input files are gzipped, and I am using the builtin java codecs successfully to uncompress
them in a normal java run...
>         fileIn = fs.open(fsplit.getPath());
>         codec = compressionCodecs.getCodec(fsplit.getPath());
>         in = new LineReader(codec != null ? codec.createInputStream(fileIn) : fileIn,
> But when I use the same piece of code in a MR job I am getting...
> 12/10/23 11:02:25 INFO util.NativeCodeLoader: Loaded the native-hadoop library
> 12/10/23 11:02:25 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib
> 12/10/23 11:02:25 INFO compress.CodecPool: Got brand-new compressor
> 12/10/23 11:02:26 INFO mapreduce.HFileOutputFormat: Incremental table output configured.
> 12/10/23 11:02:26 INFO input.FileInputFormat: Total input paths to process : 3
> 12/10/23 11:02:27 INFO mapred.JobClient: Running job: job_201210221549_0014
> 12/10/23 11:02:28 INFO mapred.JobClient:  map 0% reduce 0%
> 12/10/23 11:02:49 INFO mapred.JobClient: Task Id : attempt_201210221549_0014_m_000003_0,
Status : FAILED
> java.io.IOException: incorrect header check
>     at org.apache.hadoop.io.compress.zlib.ZlibDecompressor.inflateBytesDirect(Native
>     at org.apache.hadoop.io.compress.zlib.ZlibDecompressor.decompress(ZlibDecompressor.java:221)
>     at org.apache.hadoop.io.compress.DecompressorStream.decompress(DecompressorStream.java:82)
>     at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:76)
>     at java.io.InputStream.read(InputStream.java:101)
> So I am thinking that there is some incompatibility of zlib and my gzip. Is there a way
to force hadoop to use the java built-in compression codecs?
> Also, I would like to try lzo which I hope will allow splitting of the input files (I
recall reading this somewhere). Can someone point me to the best way to do this?
> Thanks,
> Jon
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Arun C. Murthy
Hortonworks Inc.

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