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https://issues.apache.org/jira/browse/HBASE-1706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell updated HBASE-1706:
----------------------------------

    Attachment: HBASE-1706.patch

Patch addresses the symptom and gets the UI working again. 

> META row with missing HRI breaks UI
> -----------------------------------
>
>                 Key: HBASE-1706
>                 URL: https://issues.apache.org/jira/browse/HBASE-1706
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>            Priority: Critical
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1706.patch
>
>
> Seeing this in the master log:
> 2009-07-26 06:01:55,373 WARN org.apache.hadoop.hbase.master.BaseScanner: 
> Found 1 rows with empty HRegionInfo while scanning meta region .META.,,1
> 2009-07-26 06:01:55,373 WARN org.apache.hadoop.hbase.master.HMaster: Removed 
> region: content,9e1f3dbffe50886f56d67044ca7177e,1248262776854 from meta 
> region: .META.,,1 because HRegionInfo was empty
> Seeing this on the master UI (http://test:60010/master.jsp):
> HTTP ERROR: 500
> INTERNAL_SERVER_ERROR
> RequestURI=/master.jsp
> Caused by:
> java.lang.NullPointerException
>       at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:74)
>       at 
> org.apache.hadoop.hbase.util.Writables.getHRegionInfo(Writables.java:118)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers$1.processRow(HConnectionManager.java:356)
>       at 
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:63)
>       at 
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:28)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.listTables(HConnectionManager.java:369)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:127)
>       at 
> org.apache.hadoop.hbase.generated.master.master_jsp._jspService(master_jsp.java:125)
>       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>       at 
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>       at 
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>       at 
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>       at 
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>       at 
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>       at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>       at 
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>       at 
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>       at org.mortbay.jetty.Server.handle(Server.java:324)
>       at 
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>       at 
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>       at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>       at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>       at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>       at 
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>       at 
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)

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