Wei-Chiu Chuang commented on HBASE-20145:

It doesn't seem to reproduce for me – tried hadoop trunk + hbase master, hadoop 
3.0.0-beta1 + hbase 2.0.0-beta1. Neither reproduced.

[~rohithsharma] could you share your hadoop and hbase configuration?

I would actually think it makes sense to add additional check to see if the 
file system directory is erasure coded, and log extra message to avoid 

> HMaster start fails with IllegalStateException when HADOOP_HOME is set
> ----------------------------------------------------------------------
>                 Key: HBASE-20145
>                 URL: https://issues.apache.org/jira/browse/HBASE-20145
>             Project: HBase
>          Issue Type: Bug
>         Environment: HBase-2.0-beta1.
> Hadoop trunk version.
> java version "1.8.0_144"
>            Reporter: Rohith Sharma K S
>            Assignee: Wei-Chiu Chuang
>            Priority: Critical
> It is observed that HMaster start is failed when HADOOP_HOME is set as env 
> while starting HMaster. HADOOP_HOME is pointing to Hadoop trunk version.
> {noformat}
> 2018-03-07 16:59:52,654 ERROR [master//] master.HMaster: 
> Failed to become active 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 
> 'hbase.procedure.store.wal.use.hsync' 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.
>     at 
> org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore.rollWriter(WALProcedureStore.java:1036)
>     at 
> org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore.recoverLease(WALProcedureStore.java:374)
>     at 
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.start(ProcedureExecutor.java:532)
>     at 
> org.apache.hadoop.hbase.master.HMaster.startProcedureExecutor(HMaster.java:1232)
>     at 
> org.apache.hadoop.hbase.master.HMaster.startServiceThreads(HMaster.java:1145)
>     at 
> org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:837)
>     at 
> org.apache.hadoop.hbase.master.HMaster.startActiveMasterManager(HMaster.java:2026)
>     at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:547)
>     at java.lang.Thread.run(Thread.java:748)
> {noformat}
> The same configs is working in HBase-1.2.6 build properly. 

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