Hi,
I'm testing out native lib support on our test amd64 test cluster
running 0.20.205 running the following
./bin/hadoop jar hadoop-test-0.20.205.0.jar testsequencefile -seed 0
-count 1000 -compressType RECORD xxx -codec
org.apache.hadoop.io.compress.GzipCodec -check 2
it fails with
WARN util.NativeCodeLoader: Unable to load native-hadoop library for
your platform... using builtin-java classes where applicable
Looking at
bin/hadoop
it seems to successfully detect that the native libs are available (they
seem to come pre-compiled with 0.20.205 which is nice)
if [ -d "${HADOOP_HOME}/lib/native" ]; then
if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then
JAVA_LIBRARY_PATH=${JAVA_LIBRARY_PATH}:${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
else
JAVA_LIBRARY_PATH=${HADOOP_HOME}/lib/native/${JAVA_PLATFORM}
fi
fi
and sets JAVA_LIBRARY_PATH to contain them.
Then in the following line, if ${HADOOP_HOME}/lib contains libhadoop.a
(which is seems to in the stock tar) then it proceeds to ignore the
native libs
if [ -e "${HADOOP_PREFIX}/lib/libhadoop.a" ]; then
JAVA_LIBRARY_PATH=${HADOOP_PREFIX}/lib
fi
Is this intentional or a bug? I can successfully use the native libs if
I comment this out but just wondering why it would prefer
${HADOOP_PREFIX}/lib/libhadoop.a?
Thanks,
-stephen
--
Stephen Mulcahy, DI2, Digital Enterprise Research Institute,
NUI Galway, IDA Business Park, Lower Dangan, Galway, Ireland
http://di2.deri.ie http://webstar.deri.ie http://sindice.com
