"An exception was thrown by org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHel
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有两种情况和原因
情况一:
WARN concurrent.DefaultPromise: An exception was thrown by
org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper$6.operationComplete()
java.lang.Error: Couldn't properly initialize access to HDFS internals.
Please update your WAL Provider to not make use of the 'asyncfs' provider.
* 其中的6也可能是其它数值
原因:
WAL(Write-Ahead-Log)需要指定写入模式(WALFactory),有defaultProvider、asyncfs、filesystem、multiwal四种选项。
https://hbase.apache.org/devapidocs/org/apache/hadoop/hbase/wal/WALFactory.html
解决方法:
在hbase-site.xml文件添加属性
vim /hbase/conf/hbase-site.xml
添加以下内容:
<property> <name>hbase.wal.provider</name> <value>filesystem</value> <!--也可以用multiwal--> </property>
情况二:
WARN [RS-EventLoopGroup-1-1] 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
* 其中的1-1也可能是其它数值
原因和解决方法:
只启动成功了Master(HMaster)和部分RegionServer,有1个或多个RegionServer没启动成功。
有可能是以下错误(解决方法也在里面):
https://www.cnblogs.com/live41/p/15497022.html
标签:thrown,exception,FanOutOneBlockAsyncDFSOutputHelper,asyncfs,hadoop,apache,org,hb 来源: https://www.cnblogs.com/live41/p/15497029.html