[GIRAPH-795] NPE when trying to run Giraph YARN when no Zookeeper configuration is supplied

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.0
• Assignee: Unassigned
• Reporter: Rob Vesse
• Created: 13/Nov/13 15:51
• Updated: 16/Dec/13 16:27
• Resolved: 16/Dec/13 16:27

Description

If you try and run Giraph compiled for YARN but have not specified any external Zookeeper settings in your Hadoop configuration files you'll receive the following error:

Exception in thread "main" java.lang.NullPointerException
	at org.apache.giraph.yarn.GiraphYarnClient.checkJobLocalZooKeeperSupported(GiraphYarnClient.java:460)
	at org.apache.giraph.yarn.GiraphYarnClient.run(GiraphYarnClient.java:116)
	at org.apache.giraph.GiraphRunner.run(GiraphRunner.java:96)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
	at org.apache.giraph.GiraphRunner.main(GiraphRunner.java:126)
	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:212)

When actually in the situations where the NPE is hit Giraph is supposed to be throwing an informative error message about the need for an external Zookeeper configuration.

This looks to be a trivial fix for which I will attach a proposed patch

Issue Links

• is duplicated by: GIRAPH-805 getZookeeperList can return null
• is related to: GIRAPH-805 getZookeeperList can return null