org.apache.hadoop.hive.thrift.HadoopThriftAuthBridge Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.thrift;
import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_SECURITY_AUTHENTICATION;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;
import java.util.Locale;
import java.util.Map;
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.sasl.AuthorizeCallback;
import javax.security.sasl.RealmCallback;
import javax.security.sasl.RealmChoiceCallback;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.hive.shims.Utils;
import org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport;
import org.apache.hadoop.security.SaslRpcServer;
import org.apache.hadoop.security.SaslRpcServer.AuthMethod;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
import org.apache.hadoop.security.authorize.AuthorizationException;
import org.apache.hadoop.security.authorize.ProxyUsers;
import org.apache.hadoop.security.token.SecretManager.InvalidToken;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.thrift.TException;
import org.apache.thrift.TProcessor;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSaslClientTransport;
import org.apache.thrift.transport.TSaslServerTransport;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
import org.apache.thrift.transport.TTransportFactory;
/**
* Functions that bridge Thrift's SASL transports to Hadoop's
* SASL callback handlers and authentication classes.
*/
public class HadoopThriftAuthBridge {
private static final Log LOG = LogFactory.getLog(HadoopThriftAuthBridge.class);
public Client createClient() {
return new Client();
}
public Client createClientWithConf(String authMethod) {
UserGroupInformation ugi;
try {
ugi = UserGroupInformation.getLoginUser();
} catch(IOException e) {
throw new IllegalStateException("Unable to get current login user: " + e, e);
}
if (loginUserHasCurrentAuthMethod(ugi, authMethod)) {
LOG.debug("Not setting UGI conf as passed-in authMethod of " + authMethod + " = current.");
return new Client();
} else {
LOG.debug("Setting UGI conf as passed-in authMethod of " + authMethod + " != current.");
Configuration conf = new Configuration();
conf.set(HADOOP_SECURITY_AUTHENTICATION, authMethod);
UserGroupInformation.setConfiguration(conf);
return new Client();
}
}
public Server createServer(String keytabFile, String principalConf) throws TTransportException {
return new Server(keytabFile, principalConf);
}
public String getServerPrincipal(String principalConfig, String host)
throws IOException {
String serverPrincipal = SecurityUtil.getServerPrincipal(principalConfig, host);
String names[] = SaslRpcServer.splitKerberosName(serverPrincipal);
if (names.length != 3) {
throw new IOException(
"Kerberos principal name does NOT have the expected hostname part: "
+ serverPrincipal);
}
return serverPrincipal;
}
public UserGroupInformation getCurrentUGIWithConf(String authMethod)
throws IOException {
UserGroupInformation ugi;
try {
ugi = UserGroupInformation.getCurrentUser();
} catch(IOException e) {
throw new IllegalStateException("Unable to get current user: " + e, e);
}
if (loginUserHasCurrentAuthMethod(ugi, authMethod)) {
LOG.debug("Not setting UGI conf as passed-in authMethod of " + authMethod + " = current.");
return ugi;
} else {
LOG.debug("Setting UGI conf as passed-in authMethod of " + authMethod + " != current.");
Configuration conf = new Configuration();
conf.set(HADOOP_SECURITY_AUTHENTICATION, authMethod);
UserGroupInformation.setConfiguration(conf);
return UserGroupInformation.getCurrentUser();
}
}
/**
* Return true if the current login user is already using the given authMethod.
*
* Used above to ensure we do not create a new Configuration object and as such
* lose other settings such as the cluster to which the JVM is connected. Required
* for oozie since it does not have a core-site.xml see HIVE-7682
*/
private boolean loginUserHasCurrentAuthMethod(UserGroupInformation ugi, String sAuthMethod) {
AuthenticationMethod authMethod;
try {
// based on SecurityUtil.getAuthenticationMethod()
authMethod = Enum.valueOf(AuthenticationMethod.class, sAuthMethod.toUpperCase(Locale.ENGLISH));
} catch (IllegalArgumentException iae) {
throw new IllegalArgumentException("Invalid attribute value for " +
HADOOP_SECURITY_AUTHENTICATION + " of " + sAuthMethod, iae);
}
LOG.debug("Current authMethod = " + ugi.getAuthenticationMethod());
return ugi.getAuthenticationMethod().equals(authMethod);
}
/**
* Read and return Hadoop SASL configuration which can be configured using
* "hadoop.rpc.protection"
* @param conf
* @return Hadoop SASL configuration
*/
public Map getHadoopSaslProperties(Configuration conf) {
// Initialize the SaslRpcServer to ensure QOP parameters are read from conf
SaslRpcServer.init(conf);
return SaslRpcServer.SASL_PROPS;
}
public static class Client {
/**
* Create a client-side SASL transport that wraps an underlying transport.
*
* @param method The authentication method to use. Currently only KERBEROS is
* supported.
* @param serverPrincipal The Kerberos principal of the target server.
* @param underlyingTransport The underlying transport mechanism, usually a TSocket.
* @param saslProps the sasl properties to create the client with
*/
public TTransport createClientTransport(
String principalConfig, String host,
String methodStr, String tokenStrForm, TTransport underlyingTransport,
Map saslProps) throws IOException {
AuthMethod method = AuthMethod.valueOf(AuthMethod.class, methodStr);
TTransport saslTransport = null;
switch (method) {
case DIGEST:
Token t= new Token();
t.decodeFromUrlString(tokenStrForm);
saslTransport = new TSaslClientTransport(
method.getMechanismName(),
null,
null, SaslRpcServer.SASL_DEFAULT_REALM,
saslProps, new SaslClientCallbackHandler(t),
underlyingTransport);
return new TUGIAssumingTransport(saslTransport, UserGroupInformation.getCurrentUser());
case KERBEROS:
String serverPrincipal = SecurityUtil.getServerPrincipal(principalConfig, host);
String names[] = SaslRpcServer.splitKerberosName(serverPrincipal);
if (names.length != 3) {
throw new IOException(
"Kerberos principal name does NOT have the expected hostname part: "
+ serverPrincipal);
}
try {
saslTransport = new TSaslClientTransport(
method.getMechanismName(),
null,
names[0], names[1],
saslProps, null,
underlyingTransport);
return new TUGIAssumingTransport(saslTransport, UserGroupInformation.getCurrentUser());
} catch (SaslException se) {
throw new IOException("Could not instantiate SASL transport", se);
}
default:
throw new IOException("Unsupported authentication method: " + method);
}
}
private static class SaslClientCallbackHandler implements CallbackHandler {
private final String userName;
private final char[] userPassword;
public SaslClientCallbackHandler(Token token) {
this.userName = encodeIdentifier(token.getIdentifier());
this.userPassword = encodePassword(token.getPassword());
}
@Override
public void handle(Callback[] callbacks)
throws UnsupportedCallbackException {
NameCallback nc = null;
PasswordCallback pc = null;
RealmCallback rc = null;
for (Callback callback : callbacks) {
if (callback instanceof RealmChoiceCallback) {
continue;
} else if (callback instanceof NameCallback) {
nc = (NameCallback) callback;
} else if (callback instanceof PasswordCallback) {
pc = (PasswordCallback) callback;
} else if (callback instanceof RealmCallback) {
rc = (RealmCallback) callback;
} else {
throw new UnsupportedCallbackException(callback,
"Unrecognized SASL client callback");
}
}
if (nc != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("SASL client callback: setting username: " + userName);
}
nc.setName(userName);
}
if (pc != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("SASL client callback: setting userPassword");
}
pc.setPassword(userPassword);
}
if (rc != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("SASL client callback: setting realm: "
+ rc.getDefaultText());
}
rc.setText(rc.getDefaultText());
}
}
static String encodeIdentifier(byte[] identifier) {
return new String(Base64.encodeBase64(identifier));
}
static char[] encodePassword(byte[] password) {
return new String(Base64.encodeBase64(password)).toCharArray();
}
}
}
public static class Server {
public enum ServerMode {
HIVESERVER2, METASTORE
};
public static final String DELEGATION_TOKEN_GC_INTERVAL =
"hive.cluster.delegation.token.gc-interval";
private final static long DELEGATION_TOKEN_GC_INTERVAL_DEFAULT = 3600000; // 1 hour
//Delegation token related keys
public static final String DELEGATION_KEY_UPDATE_INTERVAL_KEY =
"hive.cluster.delegation.key.update-interval";
public static final long DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT =
24*60*60*1000; // 1 day
public static final String DELEGATION_TOKEN_RENEW_INTERVAL_KEY =
"hive.cluster.delegation.token.renew-interval";
public static final long DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT =
24*60*60*1000; // 1 day
public static final String DELEGATION_TOKEN_MAX_LIFETIME_KEY =
"hive.cluster.delegation.token.max-lifetime";
public static final long DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT =
7*24*60*60*1000; // 7 days
public static final String DELEGATION_TOKEN_STORE_CLS =
"hive.cluster.delegation.token.store.class";
public static final String DELEGATION_TOKEN_STORE_ZK_CONNECT_STR =
"hive.cluster.delegation.token.store.zookeeper.connectString";
// alternate connect string specification configuration
public static final String DELEGATION_TOKEN_STORE_ZK_CONNECT_STR_ALTERNATE =
"hive.zookeeper.quorum";
public static final String DELEGATION_TOKEN_STORE_ZK_CONNECT_TIMEOUTMILLIS =
"hive.cluster.delegation.token.store.zookeeper.connectTimeoutMillis";
public static final String DELEGATION_TOKEN_STORE_ZK_ZNODE =
"hive.cluster.delegation.token.store.zookeeper.znode";
public static final String DELEGATION_TOKEN_STORE_ZK_ACL =
"hive.cluster.delegation.token.store.zookeeper.acl";
public static final String DELEGATION_TOKEN_STORE_ZK_ZNODE_DEFAULT =
"/hivedelegation";
protected final UserGroupInformation realUgi;
protected DelegationTokenSecretManager secretManager;
public Server() throws TTransportException {
try {
realUgi = UserGroupInformation.getCurrentUser();
} catch (IOException ioe) {
throw new TTransportException(ioe);
}
}
/**
* Create a server with a kerberos keytab/principal.
*/
protected Server(String keytabFile, String principalConf)
throws TTransportException {
if (keytabFile == null || keytabFile.isEmpty()) {
throw new TTransportException("No keytab specified");
}
if (principalConf == null || principalConf.isEmpty()) {
throw new TTransportException("No principal specified");
}
// Login from the keytab
String kerberosName;
try {
kerberosName =
SecurityUtil.getServerPrincipal(principalConf, "0.0.0.0");
UserGroupInformation.loginUserFromKeytab(
kerberosName, keytabFile);
realUgi = UserGroupInformation.getLoginUser();
assert realUgi.isFromKeytab();
} catch (IOException ioe) {
throw new TTransportException(ioe);
}
}
/**
* Create a TTransportFactory that, upon connection of a client socket,
* negotiates a Kerberized SASL transport. The resulting TTransportFactory
* can be passed as both the input and output transport factory when
* instantiating a TThreadPoolServer, for example.
*
* @param saslProps Map of SASL properties
*/
public TTransportFactory createTransportFactory(Map saslProps)
throws TTransportException {
// Parse out the kerberos principal, host, realm.
String kerberosName = realUgi.getUserName();
final String names[] = SaslRpcServer.splitKerberosName(kerberosName);
if (names.length != 3) {
throw new TTransportException("Kerberos principal should have 3 parts: " + kerberosName);
}
TSaslServerTransport.Factory transFactory = new TSaslServerTransport.Factory();
transFactory.addServerDefinition(
AuthMethod.KERBEROS.getMechanismName(),
names[0], names[1], // two parts of kerberos principal
saslProps,
new SaslRpcServer.SaslGssCallbackHandler());
transFactory.addServerDefinition(AuthMethod.DIGEST.getMechanismName(),
null, SaslRpcServer.SASL_DEFAULT_REALM,
saslProps, new SaslDigestCallbackHandler(secretManager));
return new TUGIAssumingTransportFactory(transFactory, realUgi);
}
/**
* Wrap a TProcessor in such a way that, before processing any RPC, it
* assumes the UserGroupInformation of the user authenticated by
* the SASL transport.
*/
public TProcessor wrapProcessor(TProcessor processor) {
return new TUGIAssumingProcessor(processor, secretManager, true);
}
/**
* Wrap a TProcessor to capture the client information like connecting userid, ip etc
*/
public TProcessor wrapNonAssumingProcessor(TProcessor processor) {
return new TUGIAssumingProcessor(processor, secretManager, false);
}
protected DelegationTokenStore getTokenStore(Configuration conf)
throws IOException {
String tokenStoreClassName = conf.get(DELEGATION_TOKEN_STORE_CLS, "");
if (StringUtils.isBlank(tokenStoreClassName)) {
return new MemoryTokenStore();
}
try {
Class storeClass = Class
.forName(tokenStoreClassName).asSubclass(
DelegationTokenStore.class);
return ReflectionUtils.newInstance(storeClass, conf);
} catch (ClassNotFoundException e) {
throw new IOException("Error initializing delegation token store: " + tokenStoreClassName,
e);
}
}
public void startDelegationTokenSecretManager(Configuration conf, Object rawStore, ServerMode smode)
throws IOException{
long secretKeyInterval =
conf.getLong(DELEGATION_KEY_UPDATE_INTERVAL_KEY,
DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT);
long tokenMaxLifetime =
conf.getLong(DELEGATION_TOKEN_MAX_LIFETIME_KEY,
DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT);
long tokenRenewInterval =
conf.getLong(DELEGATION_TOKEN_RENEW_INTERVAL_KEY,
DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT);
long tokenGcInterval = conf.getLong(DELEGATION_TOKEN_GC_INTERVAL,
DELEGATION_TOKEN_GC_INTERVAL_DEFAULT);
DelegationTokenStore dts = getTokenStore(conf);
dts.init(rawStore, smode);
secretManager = new TokenStoreDelegationTokenSecretManager(secretKeyInterval,
tokenMaxLifetime,
tokenRenewInterval,
tokenGcInterval, dts);
secretManager.startThreads();
}
public String getDelegationToken(final String owner, final String renewer)
throws IOException, InterruptedException {
if (!authenticationMethod.get().equals(AuthenticationMethod.KERBEROS)) {
throw new AuthorizationException(
"Delegation Token can be issued only with kerberos authentication. " +
"Current AuthenticationMethod: " + authenticationMethod.get()
);
}
//if the user asking the token is same as the 'owner' then don't do
//any proxy authorization checks. For cases like oozie, where it gets
//a delegation token for another user, we need to make sure oozie is
//authorized to get a delegation token.
//Do all checks on short names
UserGroupInformation currUser = UserGroupInformation.getCurrentUser();
UserGroupInformation ownerUgi = UserGroupInformation.createRemoteUser(owner);
if (!ownerUgi.getShortUserName().equals(currUser.getShortUserName())) {
//in the case of proxy users, the getCurrentUser will return the
//real user (for e.g. oozie) due to the doAs that happened just before the
//server started executing the method getDelegationToken in the MetaStore
ownerUgi = UserGroupInformation.createProxyUser(owner,
UserGroupInformation.getCurrentUser());
InetAddress remoteAddr = getRemoteAddress();
ProxyUsers.authorize(ownerUgi,remoteAddr.getHostAddress(), null);
}
return ownerUgi.doAs(new PrivilegedExceptionAction() {
@Override
public String run() throws IOException {
return secretManager.getDelegationToken(renewer);
}
});
}
public String getDelegationTokenWithService(String owner, String renewer, String service)
throws IOException, InterruptedException {
String token = getDelegationToken(owner, renewer);
return Utils.addServiceToToken(token, service);
}
public long renewDelegationToken(String tokenStrForm) throws IOException {
if (!authenticationMethod.get().equals(AuthenticationMethod.KERBEROS)) {
throw new AuthorizationException(
"Delegation Token can be issued only with kerberos authentication. " +
"Current AuthenticationMethod: " + authenticationMethod.get()
);
}
return secretManager.renewDelegationToken(tokenStrForm);
}
public String getUserFromToken(String tokenStr) throws IOException {
return secretManager.getUserFromToken(tokenStr);
}
public void cancelDelegationToken(String tokenStrForm) throws IOException {
secretManager.cancelDelegationToken(tokenStrForm);
}
final static ThreadLocal remoteAddress =
new ThreadLocal() {
@Override
protected synchronized InetAddress initialValue() {
return null;
}
};
public InetAddress getRemoteAddress() {
return remoteAddress.get();
}
final static ThreadLocal authenticationMethod =
new ThreadLocal() {
@Override
protected synchronized AuthenticationMethod initialValue() {
return AuthenticationMethod.TOKEN;
}
};
private static ThreadLocal remoteUser = new ThreadLocal () {
@Override
protected synchronized String initialValue() {
return null;
}
};
public String getRemoteUser() {
return remoteUser.get();
}
/** CallbackHandler for SASL DIGEST-MD5 mechanism */
// This code is pretty much completely based on Hadoop's
// SaslRpcServer.SaslDigestCallbackHandler - the only reason we could not
// use that Hadoop class as-is was because it needs a Server.Connection object
// which is relevant in hadoop rpc but not here in the metastore - so the
// code below does not deal with the Connection Server.object.
static class SaslDigestCallbackHandler implements CallbackHandler {
private final DelegationTokenSecretManager secretManager;
public SaslDigestCallbackHandler(
DelegationTokenSecretManager secretManager) {
this.secretManager = secretManager;
}
private char[] getPassword(DelegationTokenIdentifier tokenid) throws InvalidToken {
return encodePassword(secretManager.retrievePassword(tokenid));
}
private char[] encodePassword(byte[] password) {
return new String(Base64.encodeBase64(password)).toCharArray();
}
/** {@inheritDoc} */
@Override
public void handle(Callback[] callbacks) throws InvalidToken,
UnsupportedCallbackException {
NameCallback nc = null;
PasswordCallback pc = null;
AuthorizeCallback ac = null;
for (Callback callback : callbacks) {
if (callback instanceof AuthorizeCallback) {
ac = (AuthorizeCallback) callback;
} else if (callback instanceof NameCallback) {
nc = (NameCallback) callback;
} else if (callback instanceof PasswordCallback) {
pc = (PasswordCallback) callback;
} else if (callback instanceof RealmCallback) {
continue; // realm is ignored
} else {
throw new UnsupportedCallbackException(callback,
"Unrecognized SASL DIGEST-MD5 Callback");
}
}
if (pc != null) {
DelegationTokenIdentifier tokenIdentifier = SaslRpcServer.
getIdentifier(nc.getDefaultName(), secretManager);
char[] password = getPassword(tokenIdentifier);
if (LOG.isDebugEnabled()) {
LOG.debug("SASL server DIGEST-MD5 callback: setting password "
+ "for client: " + tokenIdentifier.getUser());
}
pc.setPassword(password);
}
if (ac != null) {
String authid = ac.getAuthenticationID();
String authzid = ac.getAuthorizationID();
if (authid.equals(authzid)) {
ac.setAuthorized(true);
} else {
ac.setAuthorized(false);
}
if (ac.isAuthorized()) {
if (LOG.isDebugEnabled()) {
String username =
SaslRpcServer.getIdentifier(authzid, secretManager).getUser().getUserName();
LOG.debug("SASL server DIGEST-MD5 callback: setting "
+ "canonicalized client ID: " + username);
}
ac.setAuthorizedID(authzid);
}
}
}
}
/**
* Processor that pulls the SaslServer object out of the transport, and
* assumes the remote user's UGI before calling through to the original
* processor.
*
* This is used on the server side to set the UGI for each specific call.
*/
protected class TUGIAssumingProcessor implements TProcessor {
final TProcessor wrapped;
DelegationTokenSecretManager secretManager;
boolean useProxy;
TUGIAssumingProcessor(TProcessor wrapped, DelegationTokenSecretManager secretManager,
boolean useProxy) {
this.wrapped = wrapped;
this.secretManager = secretManager;
this.useProxy = useProxy;
}
@Override
public boolean process(final TProtocol inProt, final TProtocol outProt) throws TException {
TTransport trans = inProt.getTransport();
if (!(trans instanceof TSaslServerTransport)) {
throw new TException("Unexpected non-SASL transport " + trans.getClass());
}
TSaslServerTransport saslTrans = (TSaslServerTransport)trans;
SaslServer saslServer = saslTrans.getSaslServer();
String authId = saslServer.getAuthorizationID();
authenticationMethod.set(AuthenticationMethod.KERBEROS);
LOG.debug("AUTH ID ======>" + authId);
String endUser = authId;
if(saslServer.getMechanismName().equals("DIGEST-MD5")) {
try {
TokenIdentifier tokenId = SaslRpcServer.getIdentifier(authId,
secretManager);
endUser = tokenId.getUser().getUserName();
authenticationMethod.set(AuthenticationMethod.TOKEN);
} catch (InvalidToken e) {
throw new TException(e.getMessage());
}
}
Socket socket = ((TSocket)(saslTrans.getUnderlyingTransport())).getSocket();
remoteAddress.set(socket.getInetAddress());
UserGroupInformation clientUgi = null;
try {
if (useProxy) {
clientUgi = UserGroupInformation.createProxyUser(
endUser, UserGroupInformation.getLoginUser());
remoteUser.set(clientUgi.getShortUserName());
LOG.debug("Set remoteUser :" + remoteUser.get());
return clientUgi.doAs(new PrivilegedExceptionAction() {
@Override
public Boolean run() {
try {
return wrapped.process(inProt, outProt);
} catch (TException te) {
throw new RuntimeException(te);
}
}
});
} else {
// use the short user name for the request
UserGroupInformation endUserUgi = UserGroupInformation.createRemoteUser(endUser);
remoteUser.set(endUserUgi.getShortUserName());
LOG.debug("Set remoteUser :" + remoteUser.get() + ", from endUser :" + endUser);
return wrapped.process(inProt, outProt);
}
} catch (RuntimeException rte) {
if (rte.getCause() instanceof TException) {
throw (TException)rte.getCause();
}
throw rte;
} catch (InterruptedException ie) {
throw new RuntimeException(ie); // unexpected!
} catch (IOException ioe) {
throw new RuntimeException(ioe); // unexpected!
}
finally {
if (clientUgi != null) {
try { FileSystem.closeAllForUGI(clientUgi); }
catch(IOException exception) {
LOG.error("Could not clean up file-system handles for UGI: " + clientUgi, exception);
}
}
}
}
}
/**
* A TransportFactory that wraps another one, but assumes a specified UGI
* before calling through.
*
* This is used on the server side to assume the server's Principal when accepting
* clients.
*/
static class TUGIAssumingTransportFactory extends TTransportFactory {
private final UserGroupInformation ugi;
private final TTransportFactory wrapped;
public TUGIAssumingTransportFactory(TTransportFactory wrapped, UserGroupInformation ugi) {
assert wrapped != null;
assert ugi != null;
this.wrapped = wrapped;
this.ugi = ugi;
}
@Override
public TTransport getTransport(final TTransport trans) {
return ugi.doAs(new PrivilegedAction() {
@Override
public TTransport run() {
return wrapped.getTransport(trans);
}
});
}
}
}
}
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