[HBASE-21466] WALProcedureStore uses wrong FileSystem if wal.dir is not under rootdir

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Ted Yu
• Created: 11/Nov/18 17:27
• Updated: 13/Nov/18 14:20
• Resolved: 13/Nov/18 01:03

Description

In WALProcedureStore ctor , the fs field is initialized this way:

    this.fs = walDir.getFileSystem(conf);

However, when wal.dir is not under rootdir, the above would return wrong FileSystem.
In the modified TestMasterProcedureEvents, without fix, the master wouldn't initialize.