Error Couldn t properly initialize access to HDFS internals Please update your WAL Provider to not make use of the asyncfs provider

Question

Hi Guys,

I am trying to use Hbase for a large data set, but it shows me the below error.

18/07/02 18:51:06 WARN concurrent.DefaultPromise: An exception was
thrown by org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper$13.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. See HBASE-16110 for more information.
     at org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputSaslHelper.<clinit>(FanOutOneBlockAsyncDFSOutputSaslHelper.java:268)
     at org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper.initialize(FanOutOneBlockAsyncDFSOutputHelper.java:661)
     at org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper.access$300(FanOutOneBlockAsyncDFSOutputHelper.java:118)

How can I solve this error?

Answer 1

Hi@akhtar,

I think you are trying to use AsyncFSWAL for HBase-2.x as it has better performance while consuming less resources. But the problem for AsyncFSWAL is that it hacks into the internal of the DFSClient implementation, so it will easily be broken when upgrading hadoop, even for a simple patch release.

To avoid this error you have to specify FSHLog, i.e, filesystem, explicitly in your config file.

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

Hope this will help.