Hi,
I'm trying to get Hadoop running on Windows, and I've found that it
isn't exactly a simple process (yes, I'm using Cygwin).
I've had a quick look though the mailing list, and I see the occasional
question about it, generally with the response "use Cygwin", and no
further details.
Is anyone actually successfully running Hadoop on Windows/Cygwin? If so,
have you had similar problems to those outlined below? I think there's a
fair chance the first two of these are environmental local to my
machine, but it would be nice to be sure that if I keep working on this
it will work in the end...
1) Running bin/start-all.sh gives:
: no address associated with name
That turns out to be a Unix vs DOS line endings thing (!).
Running the following commands fixed that:
dos2unix.exe /cygdrive/c/dev/prog/hadoop-0.14.1/conf/masters
dos2unix.exe /cygdrive/c/dev/prog/hadoop-0.14.1/conf/slaves
2) Any script using hadoop-daemon.sh failed. This turned out to be
another Unix vs DOS line endings thing. The critical error looked like
this:
<machine-name>: head: cannot open
`/cygdrive/c/dev/prog/hadoop-0.14.1/bin/../logs/hadoop-nlothian-namenode
-<machine-name>\r.out' for reading: No such file or directory
(note that "\r.out" in the logfile name...)
The fix for that was to alter the hadoop-daemon.sh script. Replace:
export
HADOOP_LOGFILE=hadoop-$HADOOP_IDENT_STRING-$command-`hostname`.log
with
export
HADOOP_LOGFILE=hadoop-$HADOOP_IDENT_STRING-$command-`'hostname' | sed
s/\r//`.log
and
log=$HADOOP_LOG_DIR/hadoop-$HADOOP_IDENT_STRING-$command-`hostname`.out
with
log=$HADOOP_LOG_DIR/hadoop-$HADOOP_IDENT_STRING-$command-`'hostname' |
sed s/\r//`.out
3) Now the start-all.sh script seems to run ok, but the Java processes
which are started on the slave machine (in this case the same machine as
the master) die soon after launching.
If I manually run:
bin/hadoop jobtracker
bin/hadoop tasktracker
bin/hadoop namenode
bin/hadoop datanode
I can succesfully submit jobs. However, when using the start-all.sh
script the submitted jobs fail to connect (because the jobtracker dies).
Has anyone else seen this? Is there a workaround?
Regards
Nick Lothian
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