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From Apurv Verma <dapu...@gmail.com>
Subject Re: java.lang.NoClassDefFoundError: org/xerial/snappy/SnappyInputStream
Date Fri, 24 Feb 2012 04:27:40 GMT
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/snappy lib, 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>
>>
>
>

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