Caused by: org.apache.rocketmq.client.exception.MQClientException: readLocalOffset Exception, maybe fastjson version too low
See http://rocketmq.apache.org/docs/faq/ for further details.
    at org.apache.rocketmq.client.consumer.store.LocalFileOffsetStore.readLocalOffsetBak(LocalFileOffsetStore.java:221)
    at org.apache.rocketmq.client.consumer.store.LocalFileOffsetStore.readLocalOffset(LocalFileOffsetStore.java:199)
    at org.apache.rocketmq.client.consumer.store.LocalFileOffsetStore.load(LocalFileOffsetStore.java:63)
    at org.apache.rocketmq.client.impl.consumer.DefaultMQPushConsumerImpl.start(DefaultMQPushConsumerImpl.java:609)
    at org.apache.rocketmq.client.consumer.DefaultMQPushConsumer.start(DefaultMQPushConsumer.java:698)
    at com.xquant.oms.tool.jetcache.JetCacheSyncMessageConsumer.init(JetCacheSyncMessageConsumer.java:89)
    ... 56 common frames omitted
Caused by: com.alibaba.fastjson.JSONException: syntax error, expect {, actual EOF, pos 710, fastjson-version 1.2.69
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:503)
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseRest(JavaBeanDeserializer.java:1576)
    at com.alibaba.fastjson.parser.deserializer.FastjsonASMDeserializer_1_OffsetSerializeWrapper.deserialze(Unknown Source)
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:284)
    at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:688)
    at com.alibaba.fastjson.JSON.parseObject(JSON.java:396)
    at com.alibaba.fastjson.JSON.parseObject(JSON.java:300)
    at com.alibaba.fastjson.JSON.parseObject(JSON.java:573)
    at org.apache.rocketmq.remoting.protocol.RemotingSerializable.fromJson(RemotingSerializable.java:43)
    at org.apache.rocketmq.client.consumer.store.LocalFileOffsetStore.readLocalOffsetBak(LocalFileOffsetStore.java:217)
    ... 61 common frames omitted

问题原因：因为mq换成了广播模式

解决方法：C盘搜索【.rocketmq_offsets】文件，删除即可

linux：

    find ~ -name ".rocketmq_offsets"
    
    sudo rm ~/.rocketmq_offsets