Arabic text not able to get from memcache after few days

[Senthil Raja]

Hi Folks,

I got an error from Memcache server. I able to get Arabic text from
Memcache, after initialize memcache. After few days, memcache returns ?
mark symbol, instead of Arabic text.

Please help me to resolve this issue.

Thanks for you support.

Regards
N.SenthilRaja.