Q&A

• concurrent.DefaultPromise: An exception was thrown by org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper$4.operationComplete()
  java.lang.IllegalArgumentException: object is not an instance of declaring class

hbase-site.xml 加入

<property>
  <name>hbase.wal.provider</name>
  <value>filesystem</value>
</property>

• 检查配置
• hdfs dfs -rm -r -f /hbase
• 删除元数据

zkCli.sh
rmr /hbase
deleteall /hbase
quit