Blocker Description
hadoop jar hadoop-mapreduce-examples-*.jar sort -Dmapreduce.job.acl-view
-job=* -Dmapreduce.map.output.compress=true
-Dmapreduce.map.output.compress.codec=org.apache.hadoop.io.compress.GzipCodec
-Dmapreduce.output.fileoutputformat.compress=true -Dmapreduce.output.fileoutputformat.compression.type=NONE -Dmap
reduce.output.fileoutputformat.compression.codec=org.apache.hadoop.io.compress.GzipCodec -outKey
org.apache.hadoop.io.Text -outValue org.apache.hadoop.io.Text Compression/textinput Compression/textoutput-1317315994
This will fail with native libs not found error unless -Dmapred.child.java.opts='-Djava.library.path=${HADOOP_COMMON_HOME}/lib/native/Linux-i386-32' is added.
The error in container log:
2011-09-29 17:06:56,787 DEBUG org.apache.hadoop.util.NativeCodeLoader: Trying to load the custom-built native-hadoop
library...2011-09-29 17:06:56,787 DEBUG org.apache.hadoop.util.NativeCodeLoader: Failed to load native-hadoop with
error: java.lang.UnsatisfiedLinkError: no hadoop in java.library.path2011-09-29 17:06:56,787 DEBUG
org.apache.hadoop.util.NativeCodeLoader:
java.library.path=/share/gridjdk-1.6.0_21/jre/lib/i386/server:/share/gridjdk-1.6.0_21/jre/lib/i386:/share/gridjdk-1.6.0_21/jre/../lib/i386:/tmp/mapred-local/usercache/hadoopqa/appcache/application_1317314754104_0012/container_1317314754104_0012_01_000002:/current/lib:/usr/java/packages/lib/i386:/lib:/usr/lib2011-09-29
17:06:56,787 WARN org.apache.hadoop.util.NativeCodeLoader: Unable to load native-hadoop library for your platform...
using builtin-java classes where applicable
Also note that the error that shows up at the application master for this is terrible:
Container killed by the ApplicationMaster. Container killed on request. Exit code is 137 Too Many fetch failures.Failing the attempt