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https://issues.apache.org/jira/browse/HADOOP-7750?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Trevor Powell resolved HADOOP-7750.
-----------------------------------
Resolution: Not A Problem
> DataNode: Cannot start secure cluster without privileged resources |
> tags/release-0.20.205.0-rc2
> -------------------------------------------------------------------------------------------------
>
> Key: HADOOP-7750
> URL: https://issues.apache.org/jira/browse/HADOOP-7750
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 0.20.205.1
> Environment: Linux RHEL5 64bit
> sunjava2 1.6.0r14
> http://svn.apache.org/repos/asf/hadoop/common/tags/release-0.20.205.0-rc2/branch-0.20-security-205/src/hdfs/org/apache/hadoop/hdfs/server/datanode/DataNode.java
> Reporter: Trevor Powell
> Labels: hdfs
>
> This tag compiles just fine. But after configuring it, the datanode fails on
> startup with the below error:
> TARTUP_MSG: Starting DataNode
> STARTUP_MSG: host = hd3w94m7/10.152.94.111
> STARTUP_MSG: args = []
> STARTUP_MSG: version = 0.20.205.1
> STARTUP_MSG: build =
> http://svn.apache.org/repos/asf/hadoop/common/tags/release-0.20.205.0-rc2 -r
> 1179942; compiled by 'tpowell1' on Wed Oct 12 11:14:46 PDT 2011
> ************************************************************/
> 2011-10-14 15:24:56,028 INFO org.apache.hadoop.metrics2.impl.MetricsConfig:
> loaded properties from hadoop-metrics2.properties
> 2011-10-14 15:24:56,043 INFO
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source
> MetricsSystem,sub=Stats registered.
> 2011-10-14 15:24:56,044 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period
> at 10 second(s).
> 2011-10-14 15:24:56,044 INFO
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system
> started
> 2011-10-14 15:24:56,192 INFO
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi
> registered.
> 2011-10-14 15:24:56,421 INFO org.apache.hadoop.security.UserGroupInformation:
> Asked the TGT renewer thread to terminate
> 2011-10-14 15:24:57,241 INFO org.apache.hadoop.security.UserGroupInformation:
> Login successful for user hdfs/hd3w94m7@XXX using keytab file
> /home/tpowell1/hadoop.tags.release-0.20.205.0-rc2/conf/hdfs.keytab
> 2011-10-14 15:24:57,242 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: java.lang.RuntimeException:
> Cannot start secure cluster without privileged resources.
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:306)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:281)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1545)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1484)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1502)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1628)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1645)
> 2011-10-14 15:24:57,243 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> SHUTDOWN_MSG:
> /************************************************************
> SHUTDOWN_MSG: Shutting down DataNode at hd3w94m7.XXX/10.152.94.111
> ************************************************************/
> Checking the Datanode.java code it is started with a null SecureResources .
> public static void main(String args[]) {
> secureMain(args, null);
> }
> This null resource seems to get passed all the way down to startDataNode()
> where there is a null check... which in turns throws the error we see.
> void startDataNode(Configuration conf,
> AbstractList<File> dataDirs, SecureResources resources
> ) throws IOException {
> if(UserGroupInformation.isSecurityEnabled() && resources == null)
> throw new RuntimeException("Cannot start secure cluster without " +
> "privileged resources.");
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