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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4358) NPE from CreateEditsLog
Date Mon, 13 Oct 2008 22:55:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639241#action_12639241
] 

Konstantin Shvachko commented on HADOOP-4358:
---------------------------------------------

{{CreateEditsLog}} generates edits file. It should be able to work without name-node present.
Unfortunately, {{INode.setAccessTime()}} calls a static method on {{FSNamesystem}}, which
had not been instantiated at the time. 
I think the right thing to do here is to store aTime as-is, rather than up to an hour. {{getAccessTime()}}
then should round aTime up to the latset hour and return it.
{code}
void setAccessTime(long aTime) {
  this.accessTime = aTime;
}
long getAccessTime() {
  return (this.accessTime / precision) * precision;
}
{code}


> NPE from CreateEditsLog
> -----------------------
>
>                 Key: HADOOP-4358
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4358
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs, test
>    Affects Versions: 0.19.0
>            Reporter: Chris Douglas
>            Priority: Blocker
>             Fix For: 0.19.0
>
>
> HADOOP-1869 added a call to setAccessTime(long) from the INode cstr, which relies on
a non-null value from FSNamesystem::getFSNamesystem.
> {noformat}
> java.lang.NullPointerException
>         at org.apache.hadoop.hdfs.server.namenode.INode.setAccessTime(INode.java:301)
>         at org.apache.hadoop.hdfs.server.namenode.INode.<init>(INode.java:99)
>         at org.apache.hadoop.hdfs.server.namenode.INodeDirectory.<init>(INodeDirectory.java:45)
>         at org.apache.hadoop.hdfs.CreateEditsLog.addFiles(CreateEditsLog.java:68)
>         at org.apache.hadoop.hdfs.CreateEditsLog.main(CreateEditsLog.java:214)
> {noformat}

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