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Posted to common-dev@hadoop.apache.org by "Koji Noguchi (JIRA)" <ji...@apache.org> on 2008/10/27 23:03:44 UTC
[jira] Commented: (HADOOP-4526) fsck failing with
NullPointerException (return value 0)
[ https://issues.apache.org/jira/browse/HADOOP-4526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643075#action_12643075 ]
Koji Noguchi commented on HADOOP-4526:
--------------------------------------
Reproduced the problem on a singlenode cluster by inserting some sleep.
Very similar issue with HADOOP-3107.
It somehow prints out the full stacktrace to the log only when there's no successful fsck before that.
(I believe it's an uncaught exception)
{noformat}
2008-10-27 21:50:17,285 WARN /: /fsck?path=%2Fuser:
java.lang.NullPointerException
at org.apache.hadoop.dfs.NamenodeFsck.check(NamenodeFsck.java:172)
at org.apache.hadoop.dfs.NamenodeFsck.check(NamenodeFsck.java:166)
at org.apache.hadoop.dfs.NamenodeFsck.fsck(NamenodeFsck.java:129)
at org.apache.hadoop.dfs.FsckServlet.doGet(FsckServlet.java:48)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:475)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
at org.mortbay.http.HttpServer.service(HttpServer.java:954)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
{noformat}
{code:title=NamenodeFsck.java|borderStyle=solid}
171 LocatedBlocks blocks = nn.namesystem.getBlockLocations(path, 0, fileLen);
172 isOpen = blocks.isUnderConstruction();
{code}
> fsck failing with NullPointerException (return value 0)
> --------------------------------------------------------
>
> Key: HADOOP-4526
> URL: https://issues.apache.org/jira/browse/HADOOP-4526
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.1
> Environment: 0.18.1_H4277_H4271_H4326_H4314_H4395_H4351_H4407_H3217
> Reporter: Koji Noguchi
>
> fsck is siliently dying with return value of 0.
> Namenode log showing
> 2008-10-27 07:57:00,514 WARN /: /fsck?path=%2F:
> java.lang.NullPointerException
> No stack trace.
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