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From Thomas Jungblut <thomas.jungb...@googlemail.com>
Subject Re: java.lang.NoClassDefFoundError: org/xerial/snappy/SnappyInputStream
Date Sun, 26 Feb 2012 12:49:34 GMT
@Apurv, no because of: if (conf.get(COMPRESSION_CODEC_CLASS) != null). If
it is not mapped in the configuration, then the returned string is null.

I think we should provide a setter for it so that user can specify
> compression type and optimize their jobs.


+1.

2012/2/26 Edward J. Yoon <edwardyoon@apache.org>

> I think we should provide a setter for it so that user can specify
> compression type and optimize their jobs.
>
> On Sun, Feb 26, 2012 at 9:29 PM, Thomas Jungblut
> <thomas.jungblut@googlemail.com> wrote:
> > You can delete the "hama.messenger.compression.class" property in
> > hama-default.xml.
> >
> > 2012/2/26 Edward J. Yoon <edwardyoon@apache.org>
> >
> >> Is there currently no way to disable the message compression?
> >>
> >> On Fri, Feb 24, 2012 at 4:50 PM, Thomas Jungblut
> >> <thomas.jungblut@googlemail.com> wrote:
> >> > I have reworked the Avro testcase to test these issues.
> >> > (org.apache.hama.bsp.message.TestAvroMessageManager).
> >> >
> >> > There I am sending 3 types of messages, booleans, doubles and ints.
> They
> >> > are packed into a single bundle, compressed and transfered and back at
> >> home
> >> > they get deserialized.
> >> > The boolean package seem to get to the desitnation correctly since B
> is
> >> the
> >> > first in the alphabet.
> >> > However, it seems that Integers and Doubles aren't transferred
> correctly:
> >> > EOF Exception while deserializing.
> >> >
> >> > Don't waste your time with it, I write him a mail later on.
> >> > The JNI version works correctly and is just a bit slower on
> compression,
> >> > whereas it is faster on decompression.
> >> >
> >> > No need to waste the time ;)
> >> >
> >> > 2012/2/24 Apurv Verma <dapurv5@gmail.com>
> >> >
> >> >> OK, I see it now. You mean to say the JNI-Snappy which is in
> org.xerial
> >> >> package works correctly but not Dain's snappy which is in org.iq80
,
> >> which
> >> >> is pure Java.
> >> >>
> >> >> I would try to check all of these after my exams, once again.(Day
> After
> >> >> tomorrow) I remember that I used 0.3-Incubating version of Dain's
> snappy
> >> >> and it seemed to work fine. I was able to run Pi Example with it.
> >> >>
> >> >> Now if we are to use the JNI version of snappy it might be slow so
> >> instead
> >> >> of using it as a default compressor, we would like to give option of
> >> >> choosing between compression and no-compression?
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >> thanks and regards,
> >> >>
> >> >> Apurv Verma
> >> >> B. Tech.(CSE)
> >> >> IIT- Ropar
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> On Fri, Feb 24, 2012 at 4:36 AM, Apurv Verma <dapurv5@gmail.com>
> wrote:
> >> >>
> >> >> > What is buggy in Dain's snappy, can you let me know?
> >> >> >
> >> >> > --
> >> >> > thanks and regards,
> >> >> >
> >> >> > Apurv Verma
> >> >> > B. Tech.(CSE)
> >> >> > IIT- Ropar
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > On Thu, Feb 23, 2012 at 5:06 PM, Thomas Jungblut <
> >> >> > thomas.jungblut@googlemail.com> wrote:
> >> >> >
> >> >> >> It seems that Dain's snappy is buggy. I tried the Hadoop codec
as
> >> well
> >> >> as
> >> >> >> directly using streams. However, I just changed it to the
xerial
> >> version
> >> >> >> in
> >> >> >> POM and it now works correctly.
> >> >> >>
> >> >> >> I will contact dain and try to sort out things.  Please update
the
> >> trunk
> >> >> >> and rebuild.
> >> >> >> Sorry for the inconvenience.
> >> >> >>
> >> >> >> 2012/2/23 Thomas Jungblut <thomas.jungblut@googlemail.com>
> >> >> >>
> >> >> >> > Yep, maybe this is the issue. In the Maven POM is the
dain
> >> version, in
> >> >> >> > impor statements the xerial version. Sorry for the
> inconsistency. I
> >> >> fix
> >> >> >> it.
> >> >> >> >
> >> >> >> >
> >> >> >> > 2012/2/23 Thomas Jungblut <thomas.jungblut@googlemail.com>
> >> >> >> >
> >> >> >> >> Wait a minute, I guess this is the wrong library.
> >> >> >> >>
> >> >> >> >> My intention was to use the  https://github.com/dain/snappylib,
> >> >> since
> >> >> >> >> it is faster than the JNI port.
> >> >> >> >> I investigate it after launch.
> >> >> >> >>
> >> >> >> >>
> >> >> >> >> 2012/2/23 Edward J. Yoon <edwardyoon@apache.org>
> >> >> >> >>
> >> >> >> >>> Hmm, the snappy-0.2.jar is already in lib folder.
> >> >> >> >>>
> >> >> >> >>> edward@slave:~/workspace/hama-trunk$ ls lib/
> >> >> >> >>> ant-1.7.1.jar           commons-configuration-1.6.jar
> >> >> >> >>> hadoop-test-1.0.0.jar         jetty-util-6.1.14.jar
> >> >> >> >>> netty-3.2.6.Final.jar    zookeeper-3.3.3.jar
> >> >> >> >>> ant-launcher-1.7.1.jar  commons-lang-2.6.jar
> >> >> >> >>> jackson-core-asl-1.9.2.jar    jsp-2.1-6.1.14.jar
> >> >> >> >>> servlet-api-6.0.32.jar
> >> >> >> >>> avro-1.6.0.jar          commons-logging-1.1.1.jar
> >> >> >> >>> jackson-mapper-asl-1.9.2.jar  jsp-api-2.1-6.1.14.jar
> >> >> >> >>> slf4j-api-1.5.8.jar
> >> >> >> >>> avro-ipc-1.6.0.jar      guava-10.0.1.jar
> >> >> >> >>> jetty-6.1.14.jar              junit-4.8.1.jar
> >> >> >> >>> slf4j-log4j12-1.5.8.jar
> >> >> >> >>> commons-cli-1.2.jar     hadoop-core-1.0.0.jar
> >> >> >> >>> jetty-annotations-6.1.14.jar  log4j-1.2.16.jar
> >>  snappy-0.2.jar
> >> >> >> >>>
> >> >> >> >>>
> >> >> >> >>> On Thu, Feb 23, 2012 at 4:51 PM, Thomas Jungblut
> >> >> >> >>> <thomas.jungblut@googlemail.com> wrote:
> >> >> >> >>> > You have to update your jars, Snappy is
a new dependency for
> >> >> >> >>> compression.
> >> >> >> >>> >
> >> >> >> >>> > 2012/2/23 Edward J. Yoon <edwardyoon@apache.org>
> >> >> >> >>> >
> >> >> >> >>> >> I received below error message with
pi example.
> >> >> >> >>> >>
> >> >> >> >>> >> 12/02/23 15:26:16 DEBUG sync.ZooKeeperSyncClientImpl:
> >> >> >> leaveBarrier()
> >> >> >> >>> >> at superstep:-1 znode size: (0) znodes:[]
> >> >> >> >>> >> 12/02/23 15:26:16 WARN bsp.GroomServer:
Error running child
> >> >> >> >>> >> java.lang.NoClassDefFoundError:
> >> >> org/xerial/snappy/SnappyInputStream
> >> >> >> >>> >>        at java.lang.Class.forName0(Native
Method)
> >> >> >> >>> >>        at java.lang.Class.forName(Class.java:247)
> >> >> >> >>> >>        at
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> >>
> >>
> org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:819)
> >> >> >> >>> >>        at
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> >>
> >>
> org.apache.hama.bsp.message.compress.BSPMessageCompressorFactory.getCompressor(BSPMessageCompressorFactory.java:37)
> >> >> >> >>> >>        at
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> >>
> >>
> org.apache.hama.bsp.message.CompressableMessageManager.initCompression(CompressableMessageManager.java:36)
> >> >> >> >>> >>        at
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> >>
> >>
> org.apache.hama.bsp.message.AvroMessageManagerImpl.init(AvroMessageManagerImpl.java:60)
> >> >> >> >>> >>        at
> >> >> >> org.apache.hama.bsp.BSPPeerImpl.<init>(BSPPeerImpl.java:145)
> >> >> >> >>> >>        at
> >> >> >> >>> >>
> >> >> >> >>>
> >> >> >>
> >> org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:969)
> >> >> >> >>> >> Caused by: java.lang.ClassNotFoundException:
> >> >> >> >>> >> org.xerial.snappy.SnappyInputStream
> >> >> >> >>> >>        at
> >> java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> >> >> >> >>> >>        at
> java.security.AccessController.doPrivileged(Native
> >> >> >> Method)
> >> >> >> >>> >>        at
> >> >> >> java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> >> >> >> >>> >>        at
> >> java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> >> >> >> >>> >>        at
> >> >> >> >>> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> >> >> >> >>> >>        at
> >> java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> >> >> >> >>> >>
> >> >> >> >>> >>
> >> >> >> >>> >> --
> >> >> >> >>> >> Best Regards, Edward J. Yoon
> >> >> >> >>> >> @eddieyoon
> >> >> >> >>> >>
> >> >> >> >>> >
> >> >> >> >>> >
> >> >> >> >>> >
> >> >> >> >>> > --
> >> >> >> >>> > Thomas Jungblut
> >> >> >> >>> > Berlin <thomas.jungblut@gmail.com>
> >> >> >> >>>
> >> >> >> >>>
> >> >> >> >>>
> >> >> >> >>> --
> >> >> >> >>> Best Regards, Edward J. Yoon
> >> >> >> >>> @eddieyoon
> >> >> >> >>>
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> >> >> >> >> --
> >> >> >> >> Thomas Jungblut
> >> >> >> >> Berlin <thomas.jungblut@gmail.com>
> >> >> >> >>
> >> >> >> >
> >> >> >> >
> >> >> >> >
> >> >> >> > --
> >> >> >> > Thomas Jungblut
> >> >> >> > Berlin <thomas.jungblut@gmail.com>
> >> >> >> >
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> --
> >> >> >> Thomas Jungblut
> >> >> >> Berlin <thomas.jungblut@gmail.com>
> >> >> >>
> >> >> >
> >> >> >
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Thomas Jungblut
> >> > Berlin <thomas.jungblut@gmail.com>
> >>
> >>
> >>
> >> --
> >> Best Regards, Edward J. Yoon
> >> @eddieyoon
> >>
> >
> >
> >
> > --
> > Thomas Jungblut
> > Berlin <thomas.jungblut@gmail.com>
>
>
>
> --
> Best Regards, Edward J. Yoon
> @eddieyoon
>



-- 
Thomas Jungblut
Berlin <thomas.jungblut@gmail.com>

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