[HDFS-14719] Correct the safemode threshold value in BlockManagerSafeMode

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.1
• Fix Version/s: 3.3.0
• Component/s: namenode
• Assignee: Hemanth Boyina
• Reporter: Surendra Singh Lilhore
• Created: 12/Aug/19 05:45
• Updated: 15/Aug/19 07:10
• Resolved: 15/Aug/19 06:54

Description

BlockManagerSafeMode is doing wrong parsing for safemode threshold. It is storing float value in double, which will give different result some time. If we store "0.999f" value in double then it will be converted to "0.9990000128746033".

this.threshold = conf.getFloat(DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY,
DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_DEFAULT);