**BUG REPORT** 1. Please describe the issue you observed: When no queues have been allocated, RocketMQ Broker get the client ConsumerRunningInfo will deserialize error. ```java com.alibaba.fastjson.JSONException: syntax error, expect {, actual } at com.alibaba.fastjson.parser.deserializer.MapDeserializer.parseMap(MapDeserializer.java:261) at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:71) at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:43) at com.alibaba.fastjson.parser.deserializer.ContextObjectDeserializer.deserialze(ContextObjectDeserializer.java:9) at com.alibaba.fastjson.parser.deserializer.FastjsonASMDeserializer_27_ConsumerRunningInfo.deserialze(Unknown Source) at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:287) at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:705) at com.alibaba.fastjson.JSON.parseObject(JSON.java:394) at com.alibaba.fastjson.JSON.parseObject(JSON.java:298) at com.alibaba.fastjson.JSON.parseObject(JSON.java:588) at org.apache.rocketmq.remoting.protocol.RemotingSerializable.fromJson(RemotingSerializable.java:46) at org.apache.rocketmq.remoting.protocol.RemotingSerializable.decode(RemotingSerializable.java:42) ```
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