Here's the test case conditions:
-Kerberized cluster
-Thread one authenticates as user1 (using keytab) and start performing a
long running task on a specific table.
-Thread two simply authenticates as user2 (using username and password ).
My observation is that as soon as thread two logins, thread one runs into
the exception below.
java.lang.RuntimeException:
org.apache.accumulo.core.client.AccumuloSecurityException: Error
BAD_CREDENTIALS for user Principal in credentials object should match
kerberos principal. Expected 'user2@example' but was 'user1@example' on
table user1.test_table(ID:3) - Username or Password is Invalid
at
org.apache.accumulo.core.client.impl.ScannerIterator.hasNext(ScannerIterator.java:161)
at java.lang.Iterable.forEach(Iterable.java:74)
at com.example.test.TestBug$1.run(TestBug.java:53)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.accumulo.core.client.AccumuloSecurityException: Error
BAD_CREDENTIALS for user Principal in credentials object should match
kerberos principal. Expected 'user2@example' but was 'user1@example' on
table user1.test_table(ID:3) - Username or Password is Invalid
at
org.apache.accumulo.core.client.impl.ThriftScanner.scan(ThriftScanner.java:465)
at
org.apache.accumulo.core.client.impl.ThriftScanner.scan(ThriftScanner.java:285)
at
org.apache.accumulo.core.client.impl.ScannerIterator$Reader.run(ScannerIterator.java:80)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.accumulo.fate.util.LoggingRunnable.run(LoggingRunnable.java:35)
... 1 more
Caused by: ThriftSecurityException(user:Principal in credentials object
should match kerberos principal. Expected 'user2@example' but was
'user1@example', code:BAD_CREDENTIALS)
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$startScan_result$startScan_resultStandardScheme.read(TabletClientService.java:6696)
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$startScan_result$startScan_resultStandardScheme.read(TabletClientService.java:6673)
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$startScan_result.read(TabletClientService.java:6596)
at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.recv_startScan(TabletClientService.java:232)
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.startScan(TabletClientService.java:208)
at
org.apache.accumulo.core.client.impl.ThriftScanner.scan(ThriftScanner.java:410)
... 6 more
========================
Java class to reproduce the issue
========================
package com.example.test;
import org.apache.accumulo.core.client.ClientConfiguration;
import org.apache.accumulo.core.client.Connector;
import org.apache.accumulo.core.client.ZooKeeperInstance;
import org.apache.accumulo.core.client.security.tokens.KerberosToken;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.security.UserGroupInformation;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginContext;
import java.io.File;
import java.io.IOException;
import java.security.PrivilegedExceptionAction;
public class TestBug {
public static void main(String[] args) throws Exception {
final String hadoopHome = "/path/to/hadoophome";
final String hadoopConfigFile = "/path/to/my-site.xml";
final String accumuloTableName = "test_table";
final String user1Name = "user1@example";
final String user1Keytab = "/etc/security/keytabs/user1.keytab";
final String user2Name = "user2@example";
final String user2Password = "user2password";
System.out.println("===================== Initializing Hadoop");
System.setProperty("hadoop.home.dir", hadoopHome);
Configuration hadoopConf = new Configuration();
hadoopConf.addResource(new Path(hadoopConfigFile));
UserGroupInformation.setConfiguration(hadoopConf);
Thread scanner = new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("=====================
Authenticate as user1 using keytab");
Connector connector = new
ZooKeeperInstance(ClientConfiguration.loadDefault())
.getConnector(user1Name, new
KerberosToken(user1Name, new File(user1Keytab), true));
for ( int i = 0; true; ++i) {
System.out.println("===================== scan
table - " + i);
connector.createScanner(accumuloTableName, new
Authorizations()).forEach(e -> System.out.println(e));
Thread.sleep(1000);
}
}catch(Exception x) {
x.printStackTrace();
}
}
});
Thread authenticator = new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("=====================
authenticate as user2 using password");
LoginContext loginCtx = new
LoginContext("MyClientJaas", new CallbackHandler() {
public void handle(Callback[] callbacks)
throws IOException, UnsupportedCallbackException {
for (Callback c : callbacks) {
if (c instanceof NameCallback)
((NameCallback) c).setName(user2Name);
if (c instanceof PasswordCallback)
((PasswordCallback)
c).setPassword(user2Password.toCharArray());
}
}
});
loginCtx.login();
UserGroupInformation.loginUserFromSubject(loginCtx.getSubject());
UserGroupInformation ugi =
UserGroupInformation.getUGIFromSubject(loginCtx.getSubject());
Connector newConnector =
ugi.doAs((PrivilegedExceptionAction<Connector>) () -> {
KerberosToken token = new KerberosToken();
return new
ZooKeeperInstance(ClientConfiguration.loadDefault()).getConnector(token.getPrincipal(),
token);
});
} catch (Exception x) {
x.printStackTrace();
}
}
});
scanner.start();
scanner.join(1000);
authenticator.start();
scanner.join();
authenticator.join();
}
}
========================
my jaas config file content:
========================
MyClientJaas {
com.sun.security.auth.module.Krb5LoginModule required client=TRUE;
};
Client {
com.sun.security.auth.module.Krb5LoginModule required
useKeyTab=true
keyTab="/etc/security/keytabs/user1.keytab"
storeKey=true
useTicketCache=false
doNotPrompt=true
debug=true
principal="user1@example";
};
