[HBASE-18263] Resolve NPE in backup Master UI when access to procedures.jsp

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 1.2.0, 2.0.0-alpha-1
• Fix Version/s: 2.0.0-alpha-2, 2.0.0
• Component/s: UI
• Hadoop Flags: Reviewed
• Assignee: Shibin Zhang
• Reporter: Shibin Zhang
• Created: 23/Jun/17 09:11
• Updated: 01/Aug/18 06:21
• Resolved: 24/Jun/17 14:17

Description

When accessing procedures.jsp ,the NPE comes in backup master UI:
HTTP ERROR 500

Problem accessing /procedures.jsp. Reason:

INTERNAL_SERVER_ERROR
Caused by:

java.lang.NullPointerException
at org.apache.hadoop.hbase.generated.master.procedures_jsp._jspService(procedures_jsp.java:67)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:113)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.hbase.http.ClickjackingPreventionFilter.doFilter(ClickjackingPreventionFilter.java:48)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.hbase.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:1354)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.apache.hadoop.hbase.http.NoCacheFilter.doFilter(NoCacheFilter.java:49)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)

In server ,only the active master initialize procedureStore in HMaster.

so ,i think it will be better to remove procedures.jsp link in backup Master UI