[SLIDER-971] NPE when "slider resolve" with "--out"

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Slider 0.80
• Fix Version/s: Slider 0.91
• Component/s: client
• Assignee: kyungwan nam
• Reporter: kyungwan nam
• Created: 10/Nov/15 07:10
• Updated: 10/Feb/16 17:59
• Resolved: 10/Feb/16 17:54

Description

this is what i did

slider-0.80.0-incubating/bin/slider resolve --path /users/yarn/services/org-apache-slider/hbase1 --out hbase1_resolved.json

but, that was failed with NPE as follows.

Exception: java.lang.NullPointerException
2015-11-10 15:41:44,063 [main] ERROR main.ServiceLauncher - Exception: java.lang.NullPointerException
java.lang.NullPointerException
        at org.apache.slider.common.tools.SliderUtils.write(SliderUtils.java:2051)
        at org.apache.slider.client.SliderClient.actionResolve(SliderClient.java:3494)
        at org.apache.slider.client.SliderClient.exec(SliderClient.java:526)
        at org.apache.slider.client.SliderClient.runService(SliderClient.java:424)
        at org.apache.slider.core.main.ServiceLauncher.launchService(ServiceLauncher.java:188)
        at org.apache.slider.core.main.ServiceLauncher.launchServiceRobustly(ServiceLauncher.java:475)
        at org.apache.slider.core.main.ServiceLauncher.launchServiceAndExit(ServiceLauncher.java:403)
        at org.apache.slider.core.main.ServiceLauncher.serviceMain(ServiceLauncher.java:630)
        at org.apache.slider.Slider.main(Slider.java:49)
2015-11-10 15:41:44,065 [main] INFO  util.ExitUtil - Exiting with status 56

I think that "parentDir" in "SliderUtils.write" should be checked whether that is null or not.