[GIRAPH-138] Don't throw stack trace for classes that aren't vertices

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Abandoned
• Assignee: Unassigned
• Reporter: Jakob Homan
• Created: 31/Jan/12 21:31
• Updated: 12/May/20 18:24
• Resolved: 12/May/20 18:24

Description

Currently if one passes in a class that isn't a vertex, we throw up a complete stack trace:

[tardis giraph-0.1]$ bin/giraph lib/giraph-0.1.jar org.apache.giraph.benchmark.PageRankBenchmark -w 10 -if org.apache.giraph.benchmark.PseudoRandomVertexInputFormat
Exception in thread "main" java.lang.RuntimeException: class org.apache.giraph.benchmark.PageRankBenchmark not org.apache.giraph.graph.BasicVertex
	at org.apache.hadoop.conf.Configuration.setClass(Configuration.java:858)
	at org.apache.giraph.graph.GiraphJob.setVertexClass(GiraphJob.java:395)
	at org.apache.giraph.GiraphRunner.run(GiraphRunner.java:94)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
	at org.apache.giraph.GiraphRunner.main(GiraphRunner.java:132)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:156)

This type of user error is routine and should be caught and result in a more descriptive error message.