[GE users] reresolve hostname failed: can't resolve host name

Chris Dagdigian dag at sonsorol.org
Mon May 5 14:19:14 BST 2008

Hi Sangamesh,

The cause of the error is clear and is entirely DNS or hostname  
related -- Grid Engine is reading the name of the qmaster host from  
the $SGE_ROOT/default/common/act_qmaster file and is then failing to  
do an hostname to IP resolve operation.

First check the contents of act_qmaster and consider adding the proper  
IP to /etc/hosts

Another good test is to use the binaries located in $SGE_ROOT/utilbin/ 
<arch>/ -- there are a number of programs there such as gethostbyname  
and gethostbyaddr -- those binaries are the ones used by SGE to do DNS  
lookups so they are the perfect tool to use when manually testing how  
SGE sees your DNS environment.


On May 5, 2008, at 3:02 AM, Sangamesh B wrote:

> Hi all,
>      The cluster has three systems. Master, Node and a submit host.
> Master and node have dual core dual processor AMD64 opterons, with  
> Rocks 4.3 x86_64 OS.
> Submit host: AMD athlon 64 bit processor, with RHEL 3 AS 32 bit  
> version OS.
> SGE is installed on Master and node as lx24-amd64, and on submit  
> host I untarred lx24-x86 package and copied the $SGE_ROOT/default   
> from Master node.
> The following is the error:
> # qstat -f
> reresolve hostname failed: can't resolve host name
> I observe that, when the master system boots, only sge_execd starts  
> running default. But sge_qmaster doesn't start.
> If sge_qmaster started manually (/etc/init.d/sgemaster start), throws:
> # /etc/init.d/sgemaster start
> sge_qmaster didn't start!
> This is not a qmaster host!
> Please, check your act_qmaster file!
> Changed content of $SGE_ROOT/default/common/act_qmaster from  
> test.local to test.locuzcluster.org, then manual start of sge_qmaster
> worked out.
> On submit host, the act_qmaster was "test.local",  I changed it into  
> test.locuzcluster.org. But still qstat -f throws same error:
> reresolve hostname failed: can't resolve host name
> Can any one know what might  be causing this error?
> Thanks,
> Sangamesh

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