[HBASE-16122] PerformanceEvaluation should provide user friendly hint when client threads argument is missing

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.4.0, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Konstantin Ryakhovskiy
• Reporter: Ted Yu
• Created: 27/Jun/16 18:12
• Updated: 29/Jun/16 06:17
• Resolved: 29/Jun/16 03:28

Description

I tried to run this command:

hbase pe --rows=10000 --nomapred --valueSize=2000000 sequentialWrite

java.util.NoSuchElementException
	at java.util.LinkedList.removeFirst(LinkedList.java:270)
	at java.util.LinkedList.remove(LinkedList.java:685)
	at org.apache.hadoop.hbase.PerformanceEvaluation.parseOpts(PerformanceEvaluation.java:2077)
	at org.apache.hadoop.hbase.PerformanceEvaluation.run(PerformanceEvaluation.java:2122)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
	at org.apache.hadoop.hbase.PerformanceEvaluation.main(PerformanceEvaluation.java:2159)

Number of client threads argument was missing.
PerformanceEvaluation should print user friendly message informing user of the missing argument.