hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (Reopened) (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HDFS-2948) HA: NN throws NPE during shutdown if it fails to startup
Date Thu, 16 Feb 2012 00:03:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon reopened HDFS-2948:
-------------------------------


Oops, this also needs to be fixed on the SBN it appears. Mind if I just commit the same null
check to the SBN under this same JIRA issue?

{code}

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
b/hadoop-hdfs-project/hadoop-hd
index 4e628ce..5c09512 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java
@@ -994,7 +994,9 @@ public class NameNode {
     @Override
     public void stopStandbyServices() throws IOException {
       // TODO(HA): Are we guaranteed to be the only active here?
-      namesystem.stopStandbyServices();
+      if (namesystem != null) {
+        namesystem.stopStandbyServices();
+      }
     }
     
     @Override
{code}
                
> HA: NN throws NPE during shutdown if it fails to startup
> --------------------------------------------------------
>
>                 Key: HDFS-2948
>                 URL: https://issues.apache.org/jira/browse/HDFS-2948
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: HA branch (HDFS-1623)
>
>         Attachments: hdfs-2948.txt
>
>
> Last night's nightly build had a bunch of NPEs thrown in NameNode.stop. Not sure which
patch introduced the issue, but the problem is that NameNode.stop() is called if an exception
is thrown during startup. If the exception is thrown before the namesystem is created, then
NameNode.namesystem is null, and {{namesystem.stop}} throws NPE.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message