Play memcached error on heroku

gistfile1.txt

2012-06-24T17:11:03+00:00 app[web.1]: ~ play! 1.2.4, http://www.playframework.org
2012-06-24T17:11:03+00:00 app[web.1]: ~ framework ID is prod
2012-06-24T17:11:03+00:00 app[web.1]: ~
2012-06-24T17:11:03+00:00 app[web.1]: ~ Ctrl+C to stop
2012-06-24T17:11:03+00:00 app[web.1]: ~
2012-06-24T17:11:03+00:00 app[web.1]: 17:11:03,351 INFO  ~ Shut down memcached client
2012-06-24T17:11:04+00:00 app[web.1]: 17:11:04,335 INFO  ~ Starting /app
2012-06-24T17:11:04+00:00 app[web.1]: 17:11:04,340 INFO  ~ Module rythm is available (/app/modules/r
ythm-1.0.0-RC5)
2012-06-24T17:11:04+00:00 app[web.1]: 17:11:04,340 INFO  ~ Module less is available (/app/modules/le
ss-0.9.1)
2012-06-24T17:11:04+00:00 heroku[web.1]: Process exited with status 0
2012-06-24T17:11:06+00:00 app[web.1]: 17:11:06,730 INFO  ~ Application is precompiled
2012-06-24T17:11:07+00:00 app[web.1]: 17:11:07,520 ERROR ~ Error while connecting to memcached
2012-06-24T17:11:07+00:00 app[web.1]: java.lang.IllegalArgumentException: Invalid server ``mc6.ec2.n
orthscale.net'' in list:  mc6.ec2.northscale.net
2012-06-24T17:11:07+00:00 app[web.1]:   at net.spy.memcached.AddrUtil.getAddresses(AddrUtil.java:39)

2012-06-24T17:11:07+00:00 app[web.1]:   at play.cache.MemcachedImpl.initClient(MemcachedImpl.java:97
)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.cache.MemcachedImpl.<init>(MemcachedImpl.java:89)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.cache.MemcachedImpl.getInstance(MemcachedImpl.java:4
6)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.cache.Cache.init(Cache.java:233)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.Play.start(Play.java:511)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.Play.init(Play.java:300)
2012-06-24T17:11:07+00:00 app[web.1]:   at play.server.Server.main(Server.java:158)
2012-06-24T17:11:07+00:00 app[web.1]: 17:11:07,521 WARN  ~ Fallback to local cache
2012-06-24T17:11:07+00:00 app[web.1]: 17:11:07,557 INFO  ~ Application 'BTCtoX' is now started !
2012-06-24T17:11:07+00:00 app[web.1]: 17:11:07,717 INFO  ~ Listening for HTTP on port 50591 ...