InvalidRequestException（为什么：预计日期为 8 或 0 字节长）cassandra

Question

我是 Cassandra 的新手。我正在尝试使用包含 longtype 时间戳的复合键创建一个列族。代码如下：

Composite cs = new Composite(); 
cs.addComponent(id, StringSerializer.get());
cs.addComponent(tstamp, DateSerializer.get());
Mutator mutator  = HFactory.createMutator(keyspace, stringSerializer);
mutator.insert(id, cf.getName(), HFactory.createColumn(cs, id, CompositeSerializer.get(), StringSerializer.get()));
                 mutator.insert( id, cf.getName(), HFactory.createColumn("ipaddress", usrlog.getIpaddress()));
                 mutator.insert( id, cf.getName(), HFactory.createColumn("timestamp", tstamp.getTime(), StringSerializer.get(), LongSerializer.get()));
                 mutator.insert( id, cf.getName(), HFactory.createColumn("search_term", usrlog.getSearchterm()));
                 mutator.insert( id, cf.getName(), HFactory.createColumn("user_agent", usrlog.getUseragent()));

Answer 1

因为您插入了错误的日期。长度不合适。