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 <[email protected]> > 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 <[email protected]> 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 < > > [email protected]> 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 <[email protected]> > >> > >> > 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 <[email protected]> > >> > > >> >> 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 <[email protected]> > >> >> > >> >>> 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 > >> >>> <[email protected]> wrote: > >> >>> > You have to update your jars, Snappy is a new dependency for > >> >>> compression. > >> >>> > > >> >>> > 2012/2/23 Edward J. Yoon <[email protected]> > >> >>> > > >> >>> >> 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 <[email protected]> > >> >>> > >> >>> > >> >>> > >> >>> -- > >> >>> Best Regards, Edward J. Yoon > >> >>> @eddieyoon > >> >>> > >> >> > >> >> > >> >> > >> >> -- > >> >> Thomas Jungblut > >> >> Berlin <[email protected]> > >> >> > >> > > >> > > >> > > >> > -- > >> > Thomas Jungblut > >> > Berlin <[email protected]> > >> > > >> > >> > >> > >> -- > >> Thomas Jungblut > >> Berlin <[email protected]> > >> > > > > > -- Thomas Jungblut Berlin <[email protected]>
