Thanks a lot for your help. I solved that problem by removing LDFLAGS (containing libjvm.so) from hdfs_test compilation. I added that flag to compile correctly using Makefile but that was the real problem. Only after removing it I was able to run with ant.
Thanks, Arifa -----Original Message----- From: Rasit OZDAS [mailto:rasitoz...@gmail.com] Sent: Friday, January 23, 2009 6:47 AM To: core-user@hadoop.apache.org Subject: Re: Problem running hdfs_test Hi, Arifa I had to add "LD_LIBRARY_PATH" env. var. to correctly run my example. But I have no idea if it helps, because my error wasn't a segmentation fault. I would try it anyway. LD_LIBRARY_PATH:/usr/JRE/jre1.6.0_11/jre1.6.0_11/lib:/usr/JRE/jre1.6.0_11/jre1.6.0_11/lib/amd64/server (server directory of a JRE, which contains libjvm.so file, and lib directory of the same JRE.) Hope this helps, Rasit 2009/1/21 Arifa Nisar <a-ni...@u.northwestern.edu> > Hello, > > As I mentioned in my previous email, I am having segmentation fault at > 0x0000000000000001 while running hdfs_test. I was suggested to build and > run > hdfs_test usning ant, as ant should set some environment variable which > Makefile won't. I tried building libhdfs and running hdfs_test using ant > but > I am still having same problem. Now, instead of hdfs_test, I am testing a > simple test with libhdfs. I linked a following hello world program with > libhdfs. > > #include "hdfs.h" > int main() { > printf("Hello World.\n"); > return(0); > } > > I added a line to compile this test program in > ${HADOOP_HOME}/src/c++/libhdfs/Makefile and replaced hdfs_test with this > test program in {HADOOP_HOME}/src/c++/libhdfs/tests/test-libhdfs.sh. I > build > and invoked this test using test-libhdfs target in build.xml but I am still > having segmentation fault when this simple test program is invoked from > test-libhdfs.sh. I followed the following steps > > cd ${HADOOP_HOME} > ant clean > cd ${HADOOP_HOME}/src/c++/libhdfs/ > rm -f hdfs_test hdfs_write hdfs_read libhdfs.so* *.o test > Cd ${HADOOP_HOME} > ant test-libhdfs -Dlibhdfs=1 > > Error Line > -------------- > [exec] ./tests/test-libhdfs.sh: line 85: 23019 Segmentation fault > $LIBHDFS_BUILD_DIR/$HDFS_TEST > > I have attached the output of this command with this email. I have added > "env" in test-libhdfs.sh to see what environmental variable are set. Please > suggest if any variable is wrongly set. Any kind of suggestion will be > helpful for me as I have already spent a lot of time on this problem. > > I have added following lines in Makefile and test-libhdfs.sh > > Makefile > ------------- > export JAVA_HOME=/usr/lib/jvm/java-1.7.0-icedtea-1.7.0.0.x86_64 > export OS_ARCH=amd64 > export OS_NAME=Linux > export LIBHDFS_BUILD_DIR=$(HADOOP_HOME)/src/c++/libhdfs > export SHLIB_VERSION=1 > > test-libhdfs.sh > ------------------ > > HADOOP_CONF_DIR=${HADOOP_HOME}/conf > HADOOP_LOG_DIR=${HADOOP_HOME}/logs > LIBHDFS_BUILD_DIR=${HADOOP_HOME}/src/c++/libhdfs > HDFS_TEST=test > > When I don't link libdhfs with test.c it doesn't give error and prints > "Hello World" when "ant test-libhdfs -Dlibhdfs=1" is run. I made sure that > "ant" and "hadoop" uses same java installation, I have tried this on 32 bit > machine but I am still having segmentation fault. Now, I am clueless what I > can do to correct this. Please help. > > Thanks, > Arifa. > > PS: Also please suggest is there any java version of hdfs_test? > > -----Original Message----- > From: Delip Rao [mailto:delip...@gmail.com] > Sent: Saturday, January 17, 2009 3:49 PM > To: core-user@hadoop.apache.org > Subject: Re: Problem running unning hdfs_test > > Try enabling the debug flags while compiling to get more information. > > On Sat, Jan 17, 2009 at 4:19 AM, Arifa Nisar <a-ni...@u.northwestern.edu> > wrote: > > Hello all, > > > > > > > > I am trying to test hdfs_test.c provided with hadoop installation. > > libhdfs.so and hdfs_test are built fine after making a few changes in > > $(HADOOP_HOME)/src/c++/libhdfs/Makefile. But when I try to run > ./hdfs_test, > > I get segmentation fault at 0x0000000000000001 > > > > > > > > Program received signal SIGSEGV, Segmentation fault. > > > > 0x0000000000000001 in ?? () > > > > (gdb) bt > > > > #0 0x0000000000000001 in ?? () > > > > #1 0x00007fffd0c51af5 in ?? () > > > > #2 0x0000000000000000 in ?? () > > > > > > > > A simple hello world program linked with libdhfs.so also gives the same > > error. In CLASSPATH all the jar files in $(HADOOP_HOME), > > $(HADOOP_HOME)/conf, $(HADOOP_HOME)/lib,$(JAVA_HOME)/lib are included. > > Please help. > > > > > > > > Thanks, > > > > Arifa. > > > > > > > > > -- M. Raşit ÖZDAŞ
