Kafka consumption reports an error coordinator unavailable Rediscovery will be attempt redisCovery

     This situation is coordinate Too much pressure ,_consumer_offset The distribution of historical messages in the meta topic is uneven , Because of this meta theme clean,policy Not normal delete, So it will always accumulate , And this problem is easy to occur in a single node
     terms of settlement ： Delete _consumer_offset History file ,_consumer_offset Historical documents are in log In the document , I am here kafka Of config Medium server.properties The setting in the file will log Print in the specified directory ,

So my _consumer_offset Historical files in /java/kafka/logs In file

It's here ,

take _consumer_offset Delete historical files

That's it