[OOZIE-1166] Print a more helpful message when ProxyUserService is configured wrong

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: trunk
• Fix Version/s: 3.3.2
• Assignee: Robert Kanter
• Reporter: Robert Kanter
• Created: 14/Jan/13 22:58
• Updated: 20/Jul/13 00:03
• Resolved: 16/Jan/13 01:53

Description

If you don't properly configure oozie.service.ProxyUserService.proxyuser.#USER#.hosts and oozie.service.ProxyUserService.proxyuser.#USER#.groups and then try to use the ProxyUserService, you can get an exception like this:

2013-01-14 13:46:25,482 ERROR V1JobsServlet:536 - USER[-] GROUP[-] TOKEN[-] APP[-] JOB[-] ACTION[-] URL[GET http://localhost:11000/oozie/v1/jobs?doAs=foo] error, proxyUser cannot be null
java.lang.IllegalArgumentException: proxyUser cannot be null
	at org.apache.oozie.util.ParamChecker.notEmpty(ParamChecker.java:68)
	at org.apache.oozie.service.ProxyUserService.validate(ProxyUserService.java:131)
	at org.apache.oozie.servlet.JsonRestServlet.getUser(JsonRestServlet.java:553)
	at org.apache.oozie.servlet.JsonRestServlet.service(JsonRestServlet.java:278)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.oozie.servlet.AuthFilter$2.doFilter(AuthFilter.java:126)
	at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:372)
	at org.apache.oozie.servlet.AuthFilter.doFilter(AuthFilter.java:131)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.oozie.servlet.HostnameFilter.doFilter(HostnameFilter.java:67)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Thread.java:680)

It would be more helpful to the user if it gave more information such as "proxyUser cannot be null, please make sure that oozie.service.ProxyUserService.proxyuser.#USER#.hosts and oozie.service.ProxyUserService.proxyuser.#USER#.groups are configured correctly"