SERVER_ERROR proxy write to downstream : Error while telnet

Hi,

I am using rpm of membase 1.6.4 membase-server-enterprise_x86_64_1.6.4.1.rpm. I have tested this in various redhat version. But when i tried to work with redhat EL5 kernal 2.6.18-238.5.1.el5 i am getting a strange issue.

I have done the below steps.

1. Installed the membase rpm
2. Created default bucket with membase option and replica as 1
3. restarted membase
4. telnet localhost 11211

I am getting the error
]# telnet localhost 11211
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
stats
SERVER_ERROR proxy write to downstream
===============================================================================
While checking the logs i am getting below error logs

INFO REPORT <5649.214.0> 2011-04-11 02:27:42
===============================================================================

ns_log: logging ns_port_server:0:Port server memcached on node 'ns_1@127.0.0.1' exited with status 139. Restarting. Messages:

ERROR REPORT <5649.214.0> 2011-04-11 02:27:42
===============================================================================

** Generic server <5649.214.0> terminating
** Last message in was {#Port<5649.2420>,{exit_status,139}}
** When Server state == {state,#Port<5649.2420>,memcached,
{[empty],[empty,empty]},
undefined,[],0}
** Reason for termination ==
** {abnormal,139}

CRASH REPORT <5649.214.0> 2011-04-11 02:27:42
===============================================================================
Crashing process
initial_call {ns_port_server,init,['Argument__1']}
pid <5649.214.0>
registered_name []
error_info
{exit,{abnormal,139},
[{gen_server,terminate,6},{proc_lib,init_p_do_apply,3}]}
ancestors
[<5649.213.0>,ns_port_sup,ns_server_sup,ns_server_cluster_sup,
<5649.53.0>]
messages [{'EXIT',#Port<5649.2420>,normal}]
links [<5649.213.0>]
dictionary []
trap_exit true
status running
heap_size 610
stack_size 24
reductions 731

INFO REPORT <5649.213.0> 2011-04-11 02:27:42
===============================================================================

Cushion managed supervisor for memcached failed: {abnormal,139}

INFO REPORT <5649.213.0> 2011-04-11 02:27:42
===============================================================================

ns_log: logging supervisor_cushion:1:Service memcached exited on node 'ns_1@127.0.0.1' in 0.01s

INFO REPORT <5649.71.0> 2011-04-11 02:27:42
===============================================================================

ns_log: suppressing duplicate log ns_port_server:0("Port server memcached on node 'ns_1@127.0.0.1' exited with status 139. Restarting. Messages: ") because it's been seen 4 times in the past 20.039507 secs (last seen 5.007965 secs ago

ERROR REPORT <5649.111.0> 2011-04-11 02:27:43
===============================================================================

ns_1@127.0.0.1:ns_memcached:374: Unable to connect: {error,
{badmatch,
{error,econnrefused}}}, retrying.

INFO REPORT <5649.215.0> 2011-04-11 02:27:44
===============================================================================

ns_1@127.0.0.1:ns_janitor:269: Waiting for "default" on ['ns_1@127.0.0.1']

ERROR REPORT <5649.111.0> 2011-04-11 02:27:44
===============================================================================

ns_1@127.0.0.1:ns_memcached:374: Unable to connect: {error,
{badmatch,
{error,econnrefused}}}, retrying.

INFO REPORT <5649.215.0> 2011-04-11 02:27:45
===============================================================================

ns_1@127.0.0.1:ns_janitor:269: Waiting for "default" on ['ns_1@127.0.0.1']

ERROR REPORT <5649.111.0> 2011-04-11 02:27:45
===============================================================================

ns_1@127.0.0.1:ns_memcached:374: Unable to connect: {error,
{badmatch,
{error,econnrefused}}}, retrying.

*********************************************************************************************************

Please help me out with this issue

Thanks,
Pradeep