[HBASE-28778] NPE may occur when opening master-status or table.jsp or procedure.jsp while Master is initializing

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.7.0, 3.0.0-beta-2, 2.6.1, 2.5.11
• Component/s: UI
• Labels: pull-request-available
• Hadoop Flags: Reviewed
• Assignee: guluo
• Reporter: guluo
• Created: 13/Aug/24 12:19
• Updated: 07/Sep/24 07:35
• Resolved: 06/Sep/24 08:57

Description

The reason:

For table.jsp, NPE may occur when calling  master.getConnection() while Master is initializing.
asyncClusterConnection will only be initialized when HMaster call method setupClusterConnection,
so before that, asyncClusterConnection is null, at this moment,  we would get NPE if opening table.jsp.

procedure.jsp and master-status may also encounter NPE for the similar reason.

 

Error Message：

java.lang.NullPointerException: Cannot invoke "org.apache.hadoop.hbase.procedure2.ProcedureExecutor.getProcedures()" because "procExecutor" is null at org.apache.hadoop.hbase.generated.master.procedures_jsp._jspService(procedures_jsp.java:76) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1450) at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799) at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656) at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:117) at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)

 

2024-08-13T20:41:40,056 WARN  [qtp463313451-80] server.HttpChannel: /master-status
java.lang.NullPointerException: Cannot invoke "org.apache.hadoop.hbase.master.assignment.RegionStateNode.isInState(org.apache.hadoop.hbase.master.RegionState$State[])" because "rsn" is null
        at org.apache.hadoop.hbase.master.http.MasterStatusServlet.getMetaLocationOrNull(MasterStatusServlet.java:80) ~[hbase-server-4.0.0-alpha-1-SNAPSHOT.jar:4.0.0-alpha-1-SNAPSHOT]
        at org.apache.hadoop.hbase.master.http.MasterStatusServlet.doGet(MasterStatusServlet.java:60) ~[hbase-server-4.0.0-alpha-1-SNAPSHOT.jar:4.0.0-alpha-1-SNAPSHOT]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) ~[javax.servlet-api-3.1.0.jar:3.1.0]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[javax.servlet-api-3.1.0.jar:3.1.0]
        at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799) ~[hbase-shaded-jetty-4.1.7.jar:?]
        at org.apache.hbase.thirdparty.org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656) ~[hbase-shaded-jetty-4.1.7.jar:?]
        at org.apache.hadoop.hbase.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:117) ~[hbase-http-4.0.0-alpha-1-SNAPSHOT.jar:4.0.0-alpha-1-SNAPSHOT]

 

 

Issue Links

• links to: GitHub Pull Request #6152
• links to: GitHub Pull Request #6210