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From Sean Busbey <>
Subject Re: Problem starting region server with Hbase version hbase-2.0.0
Date Thu, 07 Jun 2018 13:20:51 GMT
HBase needs HDFS syncs to avoid dataloss during component failure.

What's the output of the command "bin/hbase version"?

What's the result of doing the following in the hbase install?

ls -lah lib/hadoop*

On Jun 7, 2018 00:58, "Mich Talebzadeh" <> wrote:

yes correct I am using Hbase on hdfs  with hadoop-2.7.3

The file system is ext4.

I was hoping that I can avoid the sync option,

many thanks

Dr Mich Talebzadeh

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On 7 June 2018 at 01:43, Sean Busbey <> wrote:

> On Wed, Jun 6, 2018 at 6:11 PM, Mich Talebzadeh
> <> wrote:
> >
> >
> > so the region server started OK but then I had a problem with master :(
> >
> > java.lang.IllegalStateException: The procedure WAL relies on the
> ability to
> > hsync for proper operation during component failures, but the underlying
> > filesystem does not support doing so. Please check the config value of
> > '' to set the desired level of
> > robustness and ensure the config value of 'hbase.wal.dir' points to a
> > FileSystem mount that can provide it.
> >
> This error means that you're running on top of a Filesystem that
> doesn't provide sync.
> Are you using HDFS? What version?

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