在启动memcached时出现以下异常：
ERROR [2014-12-15 14:26:52,926] com.schooner.MemCached.AscIIClient:-1 – ++++ exception thrown while trying to get object from cache for key: discount_quota79com.bst.discount.entity.DiscountInfoabcBank
ERROR [2014-12-15 14:26:52,928] com.schooner.MemCached.AscIIClient:-1 – null
java.nio.BufferUnderflowException: null
        at java.nio.Buffer.nextGetIndex(Buffer.java:492) ~[na:1.7.0_51]
        at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:249) ~[na:1.7.0_51]
        at com.schooner.MemCached.SockInputStream.read(Unknown Source) ~[Memcached-Java-Client-3.0.2.jar:na]
        at com.schooner.MemCached.AscIIClient.get(Unknown Source) [Memcached-Java-Client-3.0.2.jar:na]
        at com.schooner.MemCached.AscIIClient.get(Unknown Source) [Memcached-Java-Client-3.0.2.jar:naat com.schooner.MemCached.AscIIClient.get(Unknown Source) [Memcached-Java-Client-3.0.2.jar:na]
        at com.schooner.MemCached.AscIIClient.get(Unknown Source) [Memcached-Java-Client-3.0.2.jar:na]
        at com.whalin.MemCached.MemCachedClient.get(Unknown Source) [Memcached-Java-Client-3.0.2.jar:na]
        at com.bst.common.tool.MemCachedUtil.get(MemCachedUtil.java:131) [MemCachedUtil.class:na]
        at com.bst.discount.service.impl.MemoryCachedService.getDiscountInfoByCode(MemoryCachedService.java:57) [MemoryCachedService.class:na]
        at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source) ~[na:na]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_51]
        at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_51]
这个异常偶尔会出现，不知道具体是什么原因