JedisDataException: ERR wrong number of arguments for 'hmset' command解决办法

向Jedis中存map出现如下错误：JedisDataException: ERR wrong number of arguments for ‘hmset’ command

java.lang.RuntimeException: redis.clients.jedis.exceptions.JedisDataException: ERR wrong number of arguments for 'hmset' command
redis.clients.jedis.exceptions.JedisDataException: ERR wrong number of arguments for 'hmset' command
	at redis.clients.jedis.Protocol.processError(Protocol.java:127)
	at redis.clients.jedis.Protocol.process(Protocol.java:161)
	at redis.clients.jedis.Protocol.read(Protocol.java:215)
	at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340)
	at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239)
	at redis.clients.jedis.Jedis.hmset(Jedis.java:705)
	at com.gmall.cart.service.impl.CartServiceImpl.loadCartCache(CartServiceImpl.java:185)
	at com.gmall.cart.service.impl.CartServiceImpl.getCartList(CartServiceImpl.java:153)
	at com.alibaba.dubbo.common.bytecode.Wrapper2.invokeMethod(Wrapper2.java)
	at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:45)
	at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:71)
	at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:48)
	at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:52)
	at com.reger.dubbo.rpc.filter.ProceedingJoinPoint.proceed(ProceedingJoinPoint.java:40)
	at com.reger.dubbo.rpc.filter.ProviderFilterBean.invoke(ProviderFilterBean.java:34)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:61)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:74)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:41)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:77)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:71)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:131)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:98)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:168)
	at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:50)
	at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:79)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:748)

解决办法：

是因为hmset(key,map)中map为空导致的，具体的应该判断一下再存。

  if(cartInfoList == null || cartInfoList.size()==0){
           return null;
  }