Hi,
I encounter a problem about when I install the LZO,
after i install it, I found that it can run on Pig scripts
and streaming scripts and when I check these jobs though
jobtracker , it shows that
mapred.compress.map.output true,
io.compression.codecs
org.apache.hadoop.io.compress.GzipCodec,
org.apache.hadoop.io.compress.DefaultCodec,
com.hadoop.compression.lzo.LzoCodec,
com.hadoop.compression.lzo.LzopCodec
io.compression.codec.lzo.classcom.hadoop.compression.lzo.LzoCodec
and the pig && streaming can run also.
However, I found that it would gave me some error notices
such as:
2012-05-23 17:32:57,052 [Thread-6] ERROR
com.hadoop.compression.lzo.GPLNativeCodeLoader - Could not load native gpl
library
java.lang.UnsatisfiedLinkError: no gplcompression in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1738)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
at
com.hadoop.compression.lzo.GPLNativeCodeLoader.<clinit>(GPLNativeCodeLoader.java:32)
at com.hadoop.compression.lzo.LzoCodec.<clinit>(LzoCodec.java:71)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at
org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:943)
at
org.apache.hadoop.io.compress.CompressionCodecFactory.getCodecClasses(CompressionCodecFactory.java:89)
at
org.apache.hadoop.io.compress.CompressionCodecFactory.<init>(CompressionCodecFactory.java:134)
at
org.apache.hadoop.mapreduce.lib.input.TextInputFormat.isSplitable(TextInputFormat.java:46)
at
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:254)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:268)
at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:944)
at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:961)
at org.apache.hadoop.mapred.JobClient.access$500(JobClient.java:170)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:880)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:833)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
at
org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:833)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:807)
at org.apache.hadoop.mapred.jobcontrol.Job.submit(Job.java:378)
at
org.apache.hadoop.mapred.jobcontrol.JobControl.startReadyJobs(JobControl.java:247)
at
org.apache.hadoop.mapred.jobcontrol.JobControl.run(JobControl.java:279)
at java.lang.Thread.run(Thread.java:662)
2012-05-23 17:32:57,053 [Thread-6] ERROR com.hadoop.compression.lzo.LzoCodec -
Cannot load native-lzo without native-hadoop
2012-05-23 17:32:57,070 [Thread-6] INFO
org.apache.pig.backend.hadoop.executionengine.util.MapRedUtil - Total input
paths (combined) to process : 1
2012-05-23 17:32:58,419 [main] INFO
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- HadoopJobId: job_201204051731_1249
2012-05-23 17:32:58,419 [main] INFO
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- More information at:
http://hdjt:50030/jobdetails.jsp?jobid=job_201204051731_1249
2012-05-23 17:33:14,526 [main] INFO
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- 50% complete
2012-05-23 17:33:18,134 [main] INFO
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
- 100% complete
2012-05-23 17:33:18,136 [main] INFO org.apache.pig.tools.pigstats.PigStats -
Script Statistics:
HadoopVersion PigVersion UserId StartedAt FinishedAt Features
0.20.2-cdh3u0 0.8.0-cdh3u0 root 2012-05-23 17:32:54 2012-05-23
17:33:18 FILTER
Success!
Job Stats (time in seconds):
JobId Maps Reduces MaxMapTime MinMapTIme AvgMapTime
MaxReduceTime MinReduceTime AvgReduceTime Alias Feature Outputs
job_201204051731_1249 1 0 10 10 10 0 0
A,B MAP_ONLY
hdfs://hdmaster:54310/tmp/temp-1842686846/tmp-2027515206,
It make me confuse because if it has some issues, it would not work, however it
may work. So I need some help, thank you for your help!
Best Regards
Malone
2012-05-23
