[jira] Created: (HADOOP-2953) namenode doesn't start if group id cannot be resolved to name

[Andrew Gudkov (JIRA)]

namenode doesn't start if group id cannot be resolved to name
-------------------------------------------------------------

                 Key: HADOOP-2953
                 URL: https://issues.apache.org/jira/browse/HADOOP-2953
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.16.0
         Environment: Linux n510 2.6.22-3-686 #1 SMP Mon Nov 12 08:32:57 UTC 
2007 i686 GNU/Linux

Java:
java version "1.5.0_14"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_14-b03)
Java HotSpot(TM) Client VM (build 1.5.0_14-b03, mixed mode, sharing)

PAM: ldap
            Reporter: Andrew Gudkov
            Priority: Minor


Namenode failes to start because unix group name for my user can't be got. 
First, system threw rather obscure message:
{quote}
ERROR dfs.NameNode (NameNode.java:main(856)) - java.lang.NullPointerException
        at org.apache.hadoop.dfs.FSNamesystem.close(FSNamesystem.java:428)
        at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:237)
        at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:175)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:161)
        at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:843)
        at org.apache.hadoop.dfs.NameNode.main(NameNode.java:852)
{quote}

I traversed through stack trace entries, and found (FSNamesystem:237) this code
{quote}
233   FSNamesystem(NameNode nn, Configuration conf) throws IOException {
 234     try {
 235       initialize(nn, conf);
 236     } catch(IOException e) {
 237       close();
 238       throw e;
 239     }
 240   }
{quote}

Inserting e.printStackTrace() gave me next
{quote}
dfs.NameNodeMetrics (NameNodeMetrics.java:<init>(76)) - Initializing 
NameNodeMeterics using context object:org.apache.hadoop.metrics.spi.NullContext
java.io.IOException: javax.security.auth.login.LoginException: Login failed: 
id: cannot find name for group ID 1040

        at 
org.apache.hadoop.security.UnixUserGroupInformation.login(UnixUserGroupInformation.java:250)
        at 
org.apache.hadoop.security.UnixUserGroupInformation.login(UnixUserGroupInformation.java:268)
        at 
org.apache.hadoop.dfs.FSNamesystem.setConfigurationParameters(FSNamesystem.java:330)
        at org.apache.hadoop.dfs.FSNamesystem.initialize(FSNamesystem.java:249)
        at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:235)
        at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:175)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:161)
        at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:843)
        at org.apache.hadoop.dfs.NameNode.main(NameNode.java:852)

        at 
org.apache.hadoop.dfs.FSNamesystem.setConfigurationParameters(FSNamesystem.java:332)
        at org.apache.hadoop.dfs.FSNamesystem.initialize(FSNamesystem.java:249)
        at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:235)
        at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:130)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:175)
        at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:161)
        at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:843)
        at org.apache.hadoop.dfs.NameNode.main(NameNode.java:852)

{quote}

And this is true - command "groups" returns the same - id: cannot find name for 
group ID 1040.

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