LOKESKUMAR VIJAYAKUMAR created HDFS-13965:
---------------------------------------------
Summary: hadoop.security.kerberos.ticket.cache.path setting is not
honored when KMS encryption is enabled.
Key: HDFS-13965
URL: https://issues.apache.org/jira/browse/HDFS-13965
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client, kms
Affects Versions: 2.7.7, 2.7.3
Reporter: LOKESKUMAR VIJAYAKUMAR
_We use the *+hadoop.security.kerberos.ticket.cache.path+* setting to provide a
custom kerberos cache path for all hadoop operations to be run as specified
user. But this setting is not honored when KMS encryption is enabled._
_The below program to read a file works when KMS encryption is not enabled, but
it fails when the KMS encryption is enabled._
_Looks like *hadoop.security.kerberos.ticket.cache.path* setting is not honored
by *createConnection on KMSClientProvider.java.*_
HadoopTest.java (CLASSPATH needs to be set to compile and run)
import java.io.InputStream;
import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
public class HadoopTest {
public static int runRead(String[] args) throws Exception{
if (args.length < 3) {
System.err.println("HadoopTest hadoop_file_path
hadoop_user kerberos_cache");
return 1;
}
Path inputPath = new Path(args[0]);
Configuration conf = new Configuration();
URI defaultURI = FileSystem.getDefaultUri(conf);
conf.set("hadoop.security.kerberos.ticket.cache.path",args[2]);
FileSystem fs = FileSystem.newInstance(defaultURI,conf,args[1]);
InputStream is = fs.open(inputPath);
byte[] buffer = new byte[4096];
int nr = is.read(buffer);
while (nr != -1)
{
System.out.write(buffer, 0, nr);
nr = is.read(buffer);
}
return 0;
}
public static void main( String[] args ) throws Exception {
int returnCode = HadoopTest.runRead(args);
System.exit(returnCode);
}
}
[root@lstrost3 testhadoop]# pwd
/testhadoop
[root@lstrost3 testhadoop]# ls
HadoopTest.java
[root@lstrost3 testhadoop]# export CLASSPATH=`hadoop classpath --glob`:.
[root@lstrost3 testhadoop]# javac HadoopTest.java
[root@lstrost3 testhadoop]# java HadoopTest
HadoopTest hadoop_file_path hadoop_user kerberos_cache
[root@lstrost3 testhadoop]# java HadoopTest /loki/loki.file loki
/tmp/krb5cc_1006
18/09/27 23:23:20 WARN util.NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
18/09/27 23:23:21 WARN shortcircuit.DomainSocketFactory: The short-circuit
local reads feature cannot be used because libhadoop cannot be loaded.
Exception in thread "main" java.io.IOException:
org.apache.hadoop.security.authentication.client.AuthenticationException:
GSSException: *{color:#FF0000}No valid credentials provided (Mechanism level:
Failed to find any Kerberos tgt){color}*
at
{color:#FF0000}*org.apache.hadoop.crypto.key.kms.KMSClientProvider.createConnection(KMSClientProvider.java:551)*{color}
at
org.apache.hadoop.crypto.key.kms.KMSClientProvider.decryptEncryptedKey(KMSClientProvider.java:831)
at
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension.java:388)
at
org.apache.hadoop.hdfs.DFSClient.decryptEncryptedDataEncryptionKey(DFSClient.java:1393)
at
org.apache.hadoop.hdfs.DFSClient.createWrappedInputStream(DFSClient.java:1463)
at
org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:333)
at
org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:327)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:340)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:786)
at HadoopTest.runRead(HadoopTest.java:18)
at HadoopTest.main(HadoopTest.java:29)
Caused by:
org.apache.hadoop.security.authentication.client.AuthenticationException:
GSSException: No valid credentials provided (Mechanism level: Failed to find
any Kerberos tgt)
at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.doSpnegoSequence(KerberosAuthenticator.java:333)
at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:203)
at
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:133)
at
org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:216)
at
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticatedURL.openConnection(DelegationTokenAuthenticatedURL.java:322)
at
org.apache.hadoop.crypto.key.kms.KMSClientProvider$1.run(KMSClientProvider.java:542)
at
org.apache.hadoop.crypto.key.kms.KMSClientProvider$1.run(KMSClientProvider.java:537)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1869)
at
org.apache.hadoop.crypto.key.kms.KMSClientProvider.createConnection(KMSClientProvider.java:536)
... 11 more
Caused by: GSSException: No valid credentials provided (Mechanism level: Failed
to find any Kerberos tgt)
at
sun.security.jgss.krb5.Krb5InitCredential.getInstance(Krb5InitCredential.java:147)
at
sun.security.jgss.krb5.Krb5MechFactory.getCredentialElement(Krb5MechFactory.java:122)
at
sun.security.jgss.krb5.Krb5MechFactory.getMechanismContext(Krb5MechFactory.java:187)
at
sun.security.jgss.GSSManagerImpl.getMechanismContext(GSSManagerImpl.java:224)
at
sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:212)
at
sun.security.jgss.GSSContextImpl.initSecContext(GSSContextImpl.java:179)
at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator$1.run(KerberosAuthenticator.java:309)
at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator$1.run(KerberosAuthenticator.java:285)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.doSpnegoSequence(KerberosAuthenticator.java:285)
... 21 more
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