Details
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Bug
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Status: In Progress
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Major
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Resolution: Unresolved
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2.6.0
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None
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None
Description
The _HOST marker used for Kerberos principals in various configuration files does not always return lowercase fully qualified hostnames. For example this setting in hdfs-site.xml
<property> <name>dfs.namenode.kerberos.principal</name> <value>hdfs/_HOST@YOURREALM.COM</value> </property>
In particular, this is impeding our work to have Hadoop work with equivalent security on Windows as on Linux.
In the windows env in which I'm having the issue, I was able to get a fully qualified host name using this version of method getLocalHostName() in .
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SecurityUtil.java
public static String getLocalHostName() throws UnknownHostException { String hostname = InetAddress.getLocalHost().getCanonicalHostName(); if ( !hostname.contains( "." ) ) { final String os = System.getProperties().getProperty( "os.name", "?" ).toLowerCase(); if ( os.startsWith( "windows" ) ) { String domain = System.getenv( "USERDNSDOMAIN" ); if ( domain != null ) { hostname += "." + domain.trim(); } } } return hostname == null ? "localhost" : hostname.toLowerCase(); }
Attachments
Issue Links
- is related to
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HADOOP-18047 hostnmae is shown in LowerCase in SecurityUtil#replacePattern
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- Resolved
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