Hadoop 0.20.3 hangs

[rishi kapoor <rk...@gmail.com>]

Hi,

With Hadoop 0.20.3 the command for accessing dfs just hangs
(bin/hadoop dfs -ls , bin/hadoop dfs -put ).
Namenode,Datanode,Task tracker, job Tracker, Secondary Namenode all
are running and there is no error message
in any of the log files.

Stack trace show that it is waiting on  a library call to futex..

$ strace  bin/hadoop dfsadmin -report
.............
............
...........

clone(child_stack=0x7f0e54627210,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
parent_tidptr=0x7f0e546279e0, tls=0x7f0e54627910,
child_tidptr=0x7f0e546279e0) = 19893
futex(0x7f0e546279e0, FUTEX_WAIT, 19893, NULL


ipv6 is disabled on machine
"net.ipv6.conf.all.disable_ipv6 => 1" /etc/sysctl.conf."
java version 1.6.0_16

I am facing no issues while running hadoop version 0.18.3 .

Any help will be appreciated.

Thanks,
Rishi

Re: Hadoop 0.20.3 hangs

[Allen Wittenauer <aw...@linkedin.com>]

On Apr 10, 2010, at 5:36 PM, rishi kapoor wrote:
> With Hadoop 0.20.3 the command for accessing dfs just hangs
> (bin/hadoop dfs -ls , bin/hadoop dfs -put ).


hadoop 0.20.3 hasn't been released, so you'll need to be more explicit about what you are actually running.