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From "Kevin O'dell" <kevin.od...@cloudera.com>
Subject Re: How to install Snappy?
Date Mon, 03 Dec 2012 14:09:50 GMT
There is a compression test JIRA right now.  What are you seeing?

On Mon, Dec 3, 2012 at 8:47 AM, Jean-Marc Spaggiari <jean-marc@spaggiari.org
> wrote:

> Ok....
>
> This: http://code.google.com/p/hadoop-snappy/issues/detail?id=2 helped
> me and my test program is now working. I'm able to load both
> libraries. Fine.
>
> But the CompressionTest is still not working.
>
> What is very strange is that:
> 12/12/03 08:44:24 WARN snappy.LoadSnappy: Snappy native library is
> available
> 12/12/03 08:44:24 WARN snappy.LoadSnappy: Snappy native library not loaded
>
> It's available, but not loaded.
>
> But from the code:
>   static {
>     try {
>       System.loadLibrary("snappy");
>       System.loadLibrary("hadoopsnappy");
>       LOG.warn("Snappy native library is available");
>       AVAILABLE = true;
>     } catch (UnsatisfiedLinkError ex) {
>       //NOP
>     }
>     LOADED = AVAILABLE;
>     if (LOADED) {
>       LOG.info("Snappy native library loaded");
>     } else {
>       LOG.warn("Snappy native library not loaded");
>     }
>   }
> If "Snappy native library is available" is displayed, that mean
> AVAILABLE = true... And if AVAILABLE = true, then LOADED is set to
> true and Snappy native library loaded must be displayed... But it's
> not... How is this possible?
>
> I have not expected Snappy installation to be such a challenge...
>
> I will continue to dig and summarize the steps when I will be done (If
> I'm able to finish...)
>
> JM
>
> 2012/12/3, Jean-Marc Spaggiari <jean-marc@spaggiari.org>:
> > Thanks all for your replies.
> >
> > So, to reply to all in one.
> >
> > I'm not using CD3. I'm using Hadoop  1.0.3 and HBase 0.94.2 directly
> > from the JARs.
> >
> > Here are all the places where I have put the lib:
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-amd64-64/libsnappy.so
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-amd64-64/libsnappy.so.1
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-amd64-64/libsnappy.so.1.1.3
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-i386-32/libsnappy.so
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-i386-32/libsnappy.so.1
> > /home/hadoop/hadoop-1.0.3/lib/native/Linux-i386-32/libsnappy.so.1.1.3
> > /home/hbase/hbase-0.94.2/lib/native/libsnappy.so
> > /home/hbase/hbase-0.94.2/lib/native/libsnappy.so.1
> > /home/hbase/hbase-0.94.2/lib/native/libsnappy.so.1.1.3
> > /home/hbase/hbase-0.94.2/lib/native/Linux-amd64-64/libsnappy.so
> > /home/hbase/hbase-0.94.2/lib/native/Linux-amd64-64/libsnappy.so.1
> > /home/hbase/hbase-0.94.2/lib/native/Linux-amd64-64/libsnappy.so.1.1.3
> > /home/hbase/hbase-0.94.2/lib/native/Linux-i386-32/libsnappy.so
> > /home/hbase/hbase-0.94.2/lib/native/Linux-i386-32/libsnappy.so.1
> > /home/hbase/hbase-0.94.2/lib/native/Linux-i386-32/libsnappy.so.1.1.3
> > /lib/x86_64-linux-gnu/libsnappy.so
> > /usr/lib/libsnappy.so
> > /usr/lib/libsnappy.so.1
> > /usr/lib/libsnappy.so.1.1.3
> > /usr/local/lib/libsnappy.so
> > /usr/local/lib/libsnappy.so.1
> > /usr/local/lib/libsnappy.so.1.1.3
> >
> > I tried to add this on my hbase-env.xml:
> > export
> > HBASE_LIBRARY_PATH=/home/hbase/hbase-0.94.2/lib/native/Linux-amd64-64
> >
> > Before I was trying with doing export on the command line directly
> > since it seems the hbase script is taking that into consideration too.
> >
> > I have not yet put the hbase.regionserver.codecs line since I still
> > need to use my cluster until I get snappy working. On the hbase/lib
> > directory I have snappy-java-1.0.3.2.jar.
> >
> >
> > Should snappy be installed within hbase? Or should it be in hadoop?
> > I'm not sure anymore.
> >
> > But it's still not working. So I tried the small code below:
> >
> > import java.util.StringTokenizer;
> >
> > public class Test
> > {
> >   static {
> >     try {
> >       System.loadLibrary("snappy");
> >       System.loadLibrary("hadoopsnappy");
> >       System.out.println ("Snappy native library is available");
> >     } catch (UnsatisfiedLinkError ex) {
> >         ex.printStackTrace();
> >     }
> >   }
> >
> >         public static void main (String [] args)
> >         {
> >                 System.out.println ("Coucou");
> > String property = System.getProperty("java.library.path");
> > StringTokenizer parser = new StringTokenizer(property, ";");
> > while (parser.hasMoreTokens()) {
> >     System.err.println(parser.nextToken());
> >     }
> >         }
> > }
> >
> >
> > This code is from org.apache.hadoop.io.compress.snappy.LoadSnappy.
> > The error I'm getting is java.lang.UnsatisfiedLinkError: no
> > hadoopsnappy in java.library.path.
> >
> > So the issue is not the snappy lib. It' there and working fine. The
> > issue is the hadoopsnappy lib which I don't have...
> >
> > I found it there: http://code.google.com/p/hadoop-snappy/
> >
> > So I have extracted it with svn checkout
> > http://hadoop-snappy.googlecode.com/svn/trunk/
> > hadoop-snappy-read-only, tried to built it with mvn package but it's
> > failing with something saying "cannot find -ljvm"
> >
> > So seems my challenge will be to build hadoop-snappy and not to
> > install snappy which is already there and working...
> >
> > JM
> >
> > 2012/12/3, surfer <surfer@crs4.it>:
> >> hope it helps. this is what I do on apache hadoop 1.0.x and hbase
> 0.92.y:
> >> in hbase-site.xml add:
> >>
> >> <property>
> >> <name>hbase.regionserver.codecs</name>
> >> <value>snappy</value>
> >> </property>
> >>
> >> copy that file into the hadoop conf directory.
> >>
> >> in hbase-env.sh:
> >> export HBASE_LIBRARY_PATH=/pathtoyourhadoop/lib/native/Linux-amd64-64
> >>
> >> ( In hbase-env.sh I set also HBASE_HOME, HBASE_CONF_DIR, HADOOP_HOME,
> >> HADOOP_CONF_DIR but I don't know if they contribute to make snappy
> >> working...)
> >>
> >> in /pathtoyourhadoop/lib/native/Linux-amd64-64 I have:
> >> libsnappy.a
> >> libsnappy.so
> >> libsnappy.so.1
> >> libsnappy.so.1.1.2
> >>
> >> good luck
> >> giovanni
> >>
> >>
> >>
> >>
> >>
> >>
> >> On 12/02/2012 02:25 PM, Jean-Marc Spaggiari wrote:
> >>> So. I spent few hours on that yesterday with no luck.
> >>>
> >>> Here is what I did:
> >>> - Install the google tar, untared, configured, maked and installed it.
> >>> - Copied the .so files all over my fs in the os lib dir,
> >>> HBase/lib/native and subdirs, Hadoop/lib/native and subdirs.
> >>> - Installed all debian packages with snappy in the name:
> >>> python-snappy, libsnappy-dev, libsnappy1, libsnappy-java
> >>>
> >>> But still exactly the same issue as above. And I don't have any clue
> >>> where to dig. There is nothing on internet about that.
> >>>
> >>> Anyone faced that already while installing Snappy?
> >>>
> >>> JM
> >>>
> >>> 2012/12/1, Jean-Marc Spaggiari <jean-marc@spaggiari.org>:
> >>>> Sorry, I forgot to paste few maybe useful lines. I have the lib in
> >>>> /usr/local/lib copied properly, and I have the HBASE_LIBRARY_PATH set
> >>>> correctly. Do I need to restart HBase to run this test?
> >>>>
> >>>> hbase@node3:~/hbase-0.94.2$ export HBASE_LIBRARY_PATH=/usr/local/lib/
> >>>> hbase@node3:~/hbase-0.94.2$ bin/hbase
> >>>> org.apache.hadoop.hbase.util.CompressionTest /tmp/test.txt snappy
> >>>> 12/12/01 18:55:29 INFO util.ChecksumType:
> >>>> org.apache.hadoop.util.PureJavaCrc32 not available.
> >>>> 12/12/01 18:55:29 INFO util.ChecksumType: Checksum can use
> >>>> java.util.zip.CRC32
> >>>> 12/12/01 18:55:29 INFO util.ChecksumType:
> >>>> org.apache.hadoop.util.PureJavaCrc32C not available.
> >>>> 12/12/01 18:55:29 DEBUG util.FSUtils: Creating file:/tmp/test.txtwith
> >>>> permission:rwxrwxrwx
> >>>> 12/12/01 18:55:29 WARN util.NativeCodeLoader: Unable to load
> >>>> native-hadoop library for your platform... using builtin-java classes
> >>>> where applicable
> >>>> 12/12/01 18:55:29 WARN metrics.SchemaConfigured: Could not determine
> >>>> table and column family of the HFile path /tmp/test.txt. Expecting at
> >>>> least 5 path components.
> >>>> 12/12/01 18:55:29 WARN snappy.LoadSnappy: Snappy native library is
> >>>> available
> >>>> 12/12/01 18:55:29 WARN snappy.LoadSnappy: Snappy native library not
> >>>> loaded
> >>>> Exception in thread "main" java.lang.RuntimeException: native snappy
> >>>> library not available
> >>>>    at
> >>>>
> org.apache.hadoop.io.compress.SnappyCodec.getCompressorType(SnappyCodec.java:123)
> >>>>    at
> >>>>
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:100)
> >>>>    at
> >>>>
> org.apache.hadoop.io.compress.CodecPool.getCompressor(CodecPool.java:112)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.Compression$Algorithm.getCompressor(Compression.java:264)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.HFileBlock$Writer.<init>(HFileBlock.java:739)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.finishInit(HFileWriterV2.java:127)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.<init>(HFileWriterV2.java:118)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2$WriterFactoryV2.createWriter(HFileWriterV2.java:101)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.io.hfile.HFile$WriterFactory.create(HFile.java:394)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.util.CompressionTest.doSmokeTest(CompressionTest.java:108)
> >>>>    at
> >>>>
> org.apache.hadoop.hbase.util.CompressionTest.main(CompressionTest.java:138)
> >>>> hbase@node3:~/hbase-0.94.2$ ll /usr/local/lib/
> >>>> total 572
> >>>> -rw-r--r-- 1 root staff 391614 déc  1 18:33 libsnappy.a
> >>>> -rwxr-xr-x 1 root staff    957 déc  1 18:33 libsnappy.la
> >>>> lrwxrwxrwx 1 root staff     18 déc  1 18:33 libsnappy.so ->
> >>>> libsnappy.so.1.1.3
> >>>> lrwxrwxrwx 1 root staff     18 déc  1 18:33 libsnappy.so.1 ->
> >>>> libsnappy.so.1.1.3
> >>>> -rwxr-xr-x 1 root staff 178210 déc  1 18:33 libsnappy.so.1.1.3
> >>>> drwxrwsr-x 4 root staff   4096 jui 13 10:06 python2.6
> >>>> drwxrwsr-x 4 root staff   4096 jui 13 10:06 python2.7
> >>>> hbase@node3:~/hbase-0.94.2$
> >>>>
> >>>>
> >>>> 2012/12/1, Jean-Marc Spaggiari <jean-marc@spaggiari.org>:
> >>>>> Hi,
> >>>>>
> >>>>> I'm currently using GZip and want to move to Snappy.
> >>>>>
> >>>>> I have downloaded the tar file, extracted, build, make install,
make
> >>>>> check, everything is working fine.
> >>>>>
> >>>>> However, I'm not able to get this working:
> >>>>> bin/hbase org.apache.hadoop.hbase.util.CompressionTest /tmp/test.txt
> >>>>> snappy
> >>>>> 12/12/01 18:46:21 WARN snappy.LoadSnappy: Snappy native library
not
> >>>>> loaded
> >>>>> Exception in thread "main" java.lang.RuntimeException: native snappy
> >>>>> library not available
> >>>>>   at
> >>>>>
> org.apache.hadoop.io.compress.SnappyCodec.getCompressorType(SnappyCodec.java:123)
> >>>>>
> >>>>> Sound like HBase is not able to find the native library. How can
I
> >>>>> tell HBase where the library is?
> >>>>>
> >>>>> Thanks,
> >>>>>
> >>>>> JM
> >>>>>
> >>
> >>
> >
>



-- 
Kevin O'Dell
Customer Operations Engineer, Cloudera

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