[HDFS-156] namenode doesn't start if group id cannot be resolved to name

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate

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

• Assignee: Patrick Winters
• Reporter: Andrei Gudkov
• Created: 06/Mar/08 17:47
• Updated: 03/Feb/14 10:56
• Resolved: 03/Feb/14 10:56

Description

Namenode failes to start because unix group name for my user can't be got. First, system threw rather obscure message:

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)

I traversed through stack trace entries, and found (FSNamesystem:237) this code

233 FSNamesystem(NameNode nn, Configuration conf) throws IOException {
234 try

Unknown macro: { 235 initialize(nn, conf); 236 }

catch(IOException e)

Unknown macro: { 237 close(); 238 throw e; 239 }

240 }

Inserting e.printStackTrace() gave me next

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)

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

Issue Links

• duplicates: HADOOP-4656 Add a user to groups mapping service