http://git-wip-us.apache.org/repos/asf/ignite/blob/857cdcde/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/IgniteHadoopIgfsSecondaryFileSystem.java
----------------------------------------------------------------------
diff --git 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/IgniteHadoopIgfsSecondaryFileSystem.java
 
b/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/IgniteHadoopIgfsSecondaryFileSystem.java
deleted file mode 100644
index 6b5c776..0000000
--- 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/IgniteHadoopIgfsSecondaryFileSystem.java
+++ /dev/null
@@ -1,580 +0,0 @@
-/*
- * 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.ignite.hadoop.fs;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.ParentNotDirectoryException;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.PathExistsException;
-import org.apache.hadoop.fs.PathIsNotEmptyDirectoryException;
-import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.ignite.IgniteCheckedException;
-import org.apache.ignite.IgniteException;
-import org.apache.ignite.IgniteFileSystem;
-import org.apache.ignite.igfs.IgfsDirectoryNotEmptyException;
-import org.apache.ignite.igfs.IgfsException;
-import org.apache.ignite.igfs.IgfsFile;
-import org.apache.ignite.igfs.IgfsParentNotDirectoryException;
-import org.apache.ignite.igfs.IgfsPath;
-import org.apache.ignite.igfs.IgfsPathAlreadyExistsException;
-import org.apache.ignite.igfs.IgfsPathNotFoundException;
-import org.apache.ignite.igfs.IgfsUserContext;
-import 
org.apache.ignite.igfs.secondary.IgfsSecondaryFileSystemPositionedReadable;
-import org.apache.ignite.internal.processors.hadoop.HadoopPayloadAware;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsProperties;
-import 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsSecondaryFileSystemPositionedReadable;
-import org.apache.ignite.internal.processors.igfs.IgfsEntryInfo;
-import org.apache.ignite.internal.processors.igfs.IgfsFileImpl;
-import org.apache.ignite.internal.processors.igfs.IgfsSecondaryFileSystemV2;
-import org.apache.ignite.internal.processors.igfs.IgfsUtils;
-import org.apache.ignite.internal.util.typedef.F;
-import org.apache.ignite.lang.IgniteOutClosure;
-import org.apache.ignite.lang.IgniteUuid;
-import org.apache.ignite.lifecycle.LifecycleAware;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.net.URI;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.concurrent.Callable;
-
-/**
- * Secondary file system which delegates calls to an instance of Hadoop {@link 
FileSystem}.
- * <p>
- * Target {@code FileSystem}'s are created on per-user basis using passed 
{@link HadoopFileSystemFactory}.
- */
-public class IgniteHadoopIgfsSecondaryFileSystem implements 
IgfsSecondaryFileSystemV2, LifecycleAware,
-    HadoopPayloadAware {
-    /** The default user name. It is used if no user context is set. */
-    private String dfltUsrName;
-
-    /** Factory. */
-    private HadoopFileSystemFactory fsFactory;
-
-    /**
-     * Default constructor for Spring.
-     */
-    public IgniteHadoopIgfsSecondaryFileSystem() {
-        // No-op.
-    }
-
-    /**
-     * Simple constructor that is to be used by default.
-     *
-     * @param uri URI of file system.
-     * @throws IgniteCheckedException In case of error.
-     * @deprecated Use {@link #getFileSystemFactory()} instead.
-     */
-    @Deprecated
-    public IgniteHadoopIgfsSecondaryFileSystem(String uri) throws 
IgniteCheckedException {
-        this(uri, null, null);
-    }
-
-    /**
-     * Constructor.
-     *
-     * @param uri URI of file system.
-     * @param cfgPath Additional path to Hadoop configuration.
-     * @throws IgniteCheckedException In case of error.
-     * @deprecated Use {@link #getFileSystemFactory()} instead.
-     */
-    @Deprecated
-    public IgniteHadoopIgfsSecondaryFileSystem(@Nullable String uri, @Nullable 
String cfgPath)
-        throws IgniteCheckedException {
-        this(uri, cfgPath, null);
-    }
-
-    /**
-     * Constructor.
-     *
-     * @param uri URI of file system.
-     * @param cfgPath Additional path to Hadoop configuration.
-     * @param userName User name.
-     * @throws IgniteCheckedException In case of error.
-     * @deprecated Use {@link #getFileSystemFactory()} instead.
-     */
-    @Deprecated
-    public IgniteHadoopIgfsSecondaryFileSystem(@Nullable String uri, @Nullable 
String cfgPath,
-        @Nullable String userName) throws IgniteCheckedException {
-        setDefaultUserName(userName);
-
-        CachingHadoopFileSystemFactory fac = new 
CachingHadoopFileSystemFactory();
-
-        fac.setUri(uri);
-
-        if (cfgPath != null)
-            fac.setConfigPaths(cfgPath);
-
-        setFileSystemFactory(fac);
-    }
-
-    /**
-     * Gets default user name.
-     * <p>
-     * Defines user name which will be used during file system invocation in 
case no user name is defined explicitly
-     * through {@link FileSystem#get(URI, Configuration, String)}.
-     * <p>
-     * Also this name will be used if you manipulate {@link IgniteFileSystem} 
directly and do not set user name
-     * explicitly using {@link IgfsUserContext#doAs(String, IgniteOutClosure)} 
or
-     * {@link IgfsUserContext#doAs(String, Callable)} methods.
-     * <p>
-     * If not set value of system property {@code "user.name"} will be used. 
If this property is not set either,
-     * {@code "anonymous"} will be used.
-     *
-     * @return Default user name.
-     */
-    @Nullable public String getDefaultUserName() {
-        return dfltUsrName;
-    }
-
-    /**
-     * Sets default user name. See {@link #getDefaultUserName()} for details.
-     *
-     * @param dfltUsrName Default user name.
-     */
-    public void setDefaultUserName(@Nullable String dfltUsrName) {
-        this.dfltUsrName = dfltUsrName;
-    }
-
-    /**
-     * Gets secondary file system factory.
-     * <p>
-     * This factory will be used whenever a call to a target {@link 
FileSystem} is required.
-     * <p>
-     * If not set, {@link CachingHadoopFileSystemFactory} will be used.
-     *
-     * @return Secondary file system factory.
-     */
-    public HadoopFileSystemFactory getFileSystemFactory() {
-        return fsFactory;
-    }
-
-    /**
-     * Sets secondary file system factory. See {@link #getFileSystemFactory()} 
for details.
-     *
-     * @param factory Secondary file system factory.
-     */
-    public void setFileSystemFactory(HadoopFileSystemFactory factory) {
-        this.fsFactory = factory;
-    }
-
-    /**
-     * Convert IGFS path into Hadoop path.
-     *
-     * @param path IGFS path.
-     * @return Hadoop path.
-     */
-    private Path convert(IgfsPath path) {
-        URI uri = fileSystemForUser().getUri();
-
-        return new Path(uri.getScheme(), uri.getAuthority(), path.toString());
-    }
-
-    /**
-     * Heuristically checks if exception was caused by invalid HDFS version 
and returns appropriate exception.
-     *
-     * @param e Exception to check.
-     * @param detailMsg Detailed error message.
-     * @return Appropriate exception.
-     */
-    private IgfsException handleSecondaryFsError(IOException e, String 
detailMsg) {
-        return cast(detailMsg, e);
-    }
-
-    /**
-     * Cast IO exception to IGFS exception.
-     *
-     * @param e IO exception.
-     * @return IGFS exception.
-     */
-    public static IgfsException cast(String msg, IOException e) {
-        if (e instanceof FileNotFoundException)
-            return new IgfsPathNotFoundException(e);
-        else if (e instanceof ParentNotDirectoryException)
-            return new IgfsParentNotDirectoryException(msg, e);
-        else if (e instanceof PathIsNotEmptyDirectoryException)
-            return new IgfsDirectoryNotEmptyException(e);
-        else if (e instanceof PathExistsException)
-            return new IgfsPathAlreadyExistsException(msg, e);
-        else
-            return new IgfsException(msg, e);
-    }
-
-    /**
-     * Convert Hadoop FileStatus properties to map.
-     *
-     * @param status File status.
-     * @return IGFS attributes.
-     */
-    private static Map<String, String> properties(FileStatus status) {
-        FsPermission perm = status.getPermission();
-
-        if (perm == null)
-            perm = FsPermission.getDefault();
-
-        HashMap<String, String> res = new HashMap<>(3);
-
-        res.put(IgfsUtils.PROP_PERMISSION, String.format("%04o", 
perm.toShort()));
-        res.put(IgfsUtils.PROP_USER_NAME, status.getOwner());
-        res.put(IgfsUtils.PROP_GROUP_NAME, status.getGroup());
-
-        return res;
-    }
-
-    /** {@inheritDoc} */
-    @Override public boolean exists(IgfsPath path) {
-        try {
-            return fileSystemForUser().exists(convert(path));
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to check file existence 
[path=" + path + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Nullable @Override public IgfsFile update(IgfsPath path, Map<String, 
String> props) {
-        HadoopIgfsProperties props0 = new HadoopIgfsProperties(props);
-
-        final FileSystem fileSys = fileSystemForUser();
-
-        try {
-            if (props0.userName() != null || props0.groupName() != null)
-                fileSys.setOwner(convert(path), props0.userName(), 
props0.groupName());
-
-            if (props0.permission() != null)
-                fileSys.setPermission(convert(path), props0.permission());
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to update file properties 
[path=" + path + "]");
-        }
-
-        //Result is not used in case of secondary FS.
-        return null;
-    }
-
-    /** {@inheritDoc} */
-    @Override public void rename(IgfsPath src, IgfsPath dest) {
-        // Delegate to the secondary file system.
-        try {
-            if (!fileSystemForUser().rename(convert(src), convert(dest)))
-                throw new IgfsException("Failed to rename (secondary file 
system returned false) " +
-                    "[src=" + src + ", dest=" + dest + ']');
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to rename file [src=" + 
src + ", dest=" + dest + ']');
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public boolean delete(IgfsPath path, boolean recursive) {
-        try {
-            return fileSystemForUser().delete(convert(path), recursive);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to delete file [path=" + 
path + ", recursive=" + recursive + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void mkdirs(IgfsPath path) {
-        try {
-            if (!fileSystemForUser().mkdirs(convert(path)))
-                throw new IgniteException("Failed to make directories [path=" 
+ path + "]");
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to make directories 
[path=" + path + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void mkdirs(IgfsPath path, @Nullable Map<String, String> 
props) {
-        try {
-            if (!fileSystemForUser().mkdirs(convert(path), new 
HadoopIgfsProperties(props).permission()))
-                throw new IgniteException("Failed to make directories [path=" 
+ path + ", props=" + props + "]");
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to make directories 
[path=" + path + ", props=" + props + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public Collection<IgfsPath> listPaths(IgfsPath path) {
-        try {
-            FileStatus[] statuses = 
fileSystemForUser().listStatus(convert(path));
-
-            if (statuses == null)
-                throw new IgfsPathNotFoundException("Failed to list files 
(path not found): " + path);
-
-            Collection<IgfsPath> res = new ArrayList<>(statuses.length);
-
-            for (FileStatus status : statuses)
-                res.add(new IgfsPath(path, status.getPath().getName()));
-
-            return res;
-        }
-        catch (FileNotFoundException ignored) {
-            throw new IgfsPathNotFoundException("Failed to list files (path 
not found): " + path);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to list statuses due to 
secondary file system exception: " + path);
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public Collection<IgfsFile> listFiles(IgfsPath path) {
-        try {
-            FileStatus[] statuses = 
fileSystemForUser().listStatus(convert(path));
-
-            if (statuses == null)
-                throw new IgfsPathNotFoundException("Failed to list files 
(path not found): " + path);
-
-            Collection<IgfsFile> res = new ArrayList<>(statuses.length);
-
-            for (FileStatus s : statuses) {
-                IgfsEntryInfo fsInfo = s.isDirectory() ?
-                    IgfsUtils.createDirectory(
-                        IgniteUuid.randomUuid(),
-                        null,
-                        properties(s),
-                        s.getAccessTime(),
-                        s.getModificationTime()
-                    ) :
-                    IgfsUtils.createFile(
-                        IgniteUuid.randomUuid(),
-                        (int)s.getBlockSize(),
-                        s.getLen(),
-                        null,
-                        null,
-                        false,
-                        properties(s),
-                        s.getAccessTime(),
-                        s.getModificationTime()
-                    );
-
-                res.add(new IgfsFileImpl(new IgfsPath(path, 
s.getPath().getName()), fsInfo, 1));
-            }
-
-            return res;
-        }
-        catch (FileNotFoundException ignored) {
-            throw new IgfsPathNotFoundException("Failed to list files (path 
not found): " + path);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to list statuses due to 
secondary file system exception: " + path);
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public IgfsSecondaryFileSystemPositionedReadable open(IgfsPath 
path, int bufSize) {
-        return new 
HadoopIgfsSecondaryFileSystemPositionedReadable(fileSystemForUser(), 
convert(path), bufSize);
-    }
-
-    /** {@inheritDoc} */
-    @Override public OutputStream create(IgfsPath path, boolean overwrite) {
-        try {
-            return fileSystemForUser().create(convert(path), overwrite);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to create file [path=" + 
path + ", overwrite=" + overwrite + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public OutputStream create(IgfsPath path, int bufSize, boolean 
overwrite, int replication,
-        long blockSize, @Nullable Map<String, String> props) {
-        HadoopIgfsProperties props0 =
-            new HadoopIgfsProperties(props != null ? props : 
Collections.<String, String>emptyMap());
-
-        try {
-            return fileSystemForUser().create(convert(path), 
props0.permission(), overwrite, bufSize,
-                (short) replication, blockSize, null);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to create file [path=" + 
path + ", props=" + props +
-                ", overwrite=" + overwrite + ", bufSize=" + bufSize + ", 
replication=" + replication +
-                ", blockSize=" + blockSize + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public OutputStream append(IgfsPath path, int bufSize, boolean 
create,
-        @Nullable Map<String, String> props) {
-        try {
-            return fileSystemForUser().append(convert(path), bufSize);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to append file [path=" + 
path + ", bufSize=" + bufSize + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public IgfsFile info(final IgfsPath path) {
-        try {
-            final FileStatus status = 
fileSystemForUser().getFileStatus(convert(path));
-
-            if (status == null)
-                return null;
-
-            final Map<String, String> props = properties(status);
-
-            return new IgfsFile() {
-                @Override public IgfsPath path() {
-                    return path;
-                }
-
-                @Override public boolean isFile() {
-                    return status.isFile();
-                }
-
-                @Override public boolean isDirectory() {
-                    return status.isDirectory();
-                }
-
-                @Override public int blockSize() {
-                    // By convention directory has blockSize == 0, while file 
has blockSize > 0:
-                    return isDirectory() ? 0 : (int)status.getBlockSize();
-                }
-
-                @Override public long groupBlockSize() {
-                    return status.getBlockSize();
-                }
-
-                @Override public long accessTime() {
-                    return status.getAccessTime();
-                }
-
-                @Override public long modificationTime() {
-                    return status.getModificationTime();
-                }
-
-                @Override public String property(String name) throws 
IllegalArgumentException {
-                    String val = props.get(name);
-
-                    if (val ==  null)
-                        throw new IllegalArgumentException("File property not 
found [path=" + path + ", name=" + name + ']');
-
-                    return val;
-                }
-
-                @Nullable @Override public String property(String name, 
@Nullable String dfltVal) {
-                    String val = props.get(name);
-
-                    return val == null ? dfltVal : val;
-                }
-
-                @Override public long length() {
-                    return status.getLen();
-                }
-
-                /** {@inheritDoc} */
-                @Override public Map<String, String> properties() {
-                    return props;
-                }
-            };
-        }
-        catch (FileNotFoundException ignore) {
-            return null;
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to get file status [path=" 
+ path + "]");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public long usedSpaceSize() {
-        try {
-            // We don't use FileSystem#getUsed() since it counts only the files
-            // in the filesystem root, not all the files recursively.
-            return fileSystemForUser().getContentSummary(new 
Path("/")).getSpaceConsumed();
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed to get used space size of 
file system.");
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void setTimes(IgfsPath path, long accessTime, long 
modificationTime) throws IgniteException {
-        try {
-            // We don't use FileSystem#getUsed() since it counts only the files
-            // in the filesystem root, not all the files recursively.
-            fileSystemForUser().setTimes(convert(path), modificationTime, 
accessTime);
-        }
-        catch (IOException e) {
-            throw handleSecondaryFsError(e, "Failed set times for path: " + 
path);
-        }
-    }
-
-    /**
-     * Gets the underlying {@link FileSystem}.
-     * This method is used solely for testing.
-     * @return the underlying Hadoop {@link FileSystem}.
-     */
-    public FileSystem fileSystem() {
-        return fileSystemForUser();
-    }
-
-    /**
-     * Gets the FileSystem for the current context user.
-     * @return the FileSystem instance, never null.
-     */
-    private FileSystem fileSystemForUser() {
-        String user = IgfsUserContext.currentUser();
-
-        if (F.isEmpty(user))
-            user = IgfsUtils.fixUserName(dfltUsrName);
-
-        assert !F.isEmpty(user);
-
-        try {
-            return fsFactory.get(user);
-        }
-        catch (IOException ioe) {
-            throw new IgniteException(ioe);
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void start() throws IgniteException {
-        dfltUsrName = IgfsUtils.fixUserName(dfltUsrName);
-
-        if (fsFactory == null)
-            fsFactory = new CachingHadoopFileSystemFactory();
-
-        if (fsFactory instanceof LifecycleAware)
-            ((LifecycleAware) fsFactory).start();
-    }
-
-    /** {@inheritDoc} */
-    @Override public void stop() throws IgniteException {
-        if (fsFactory instanceof LifecycleAware)
-            ((LifecycleAware)fsFactory).stop();
-    }
-
-    /** {@inheritDoc} */
-    @Override public HadoopFileSystemFactory getPayload() {
-        return fsFactory;
-    }
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/857cdcde/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/KerberosHadoopFileSystemFactory.java
----------------------------------------------------------------------
diff --git 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/KerberosHadoopFileSystemFactory.java
 
b/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/KerberosHadoopFileSystemFactory.java
deleted file mode 100644
index bbfbc59..0000000
--- 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/KerberosHadoopFileSystemFactory.java
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * 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.ignite.hadoop.fs;
-
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.ignite.IgniteException;
-import org.apache.ignite.hadoop.fs.v1.IgniteHadoopFileSystem;
-import org.apache.ignite.internal.util.typedef.F;
-import org.apache.ignite.internal.util.typedef.internal.A;
-import org.apache.ignite.internal.util.typedef.internal.U;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.IOException;
-import java.io.ObjectInput;
-import java.io.ObjectOutput;
-import java.security.PrivilegedExceptionAction;
-
-/**
- * Secure Hadoop file system factory that can work with underlying file system 
protected with Kerberos.
- * It uses "impersonation" mechanism, to be able to work on behalf of 
arbitrary client user.
- * Please see 
https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Superusers.html
 for details.
- * The principal and the key tab name to be used for Kerberos authentication 
are set explicitly
- * in the factory configuration.
- *
- * <p>This factory does not cache any file system instances. If {@code 
"fs.[prefix].impl.disable.cache"} is set
- * to {@code true}, file system instances will be cached by Hadoop.
- */
-public class KerberosHadoopFileSystemFactory extends 
BasicHadoopFileSystemFactory {
-    /** */
-    private static final long serialVersionUID = 0L;
-
-    /** The default interval used to re-login from the key tab, in 
milliseconds. */
-    public static final long DFLT_RELOGIN_INTERVAL = 10 * 60 * 1000L;
-
-    /** Keytab full file name. */
-    private String keyTab;
-
-    /** Keytab principal. */
-    private String keyTabPrincipal;
-
-    /** The re-login interval. See {@link #getReloginInterval()} for more 
information. */
-    private long reloginInterval = DFLT_RELOGIN_INTERVAL;
-
-    /** Time of last re-login attempt, in system milliseconds. */
-    private transient volatile long lastReloginTime;
-
-    /**
-     * Constructor.
-     */
-    public KerberosHadoopFileSystemFactory() {
-        // No-op.
-    }
-
-    /** {@inheritDoc} */
-    @Override public FileSystem getWithMappedName(String name) throws 
IOException {
-        reloginIfNeeded();
-
-        return super.getWithMappedName(name);
-    }
-
-    /** {@inheritDoc} */
-    @Override protected FileSystem create(String usrName) throws IOException, 
InterruptedException {
-        UserGroupInformation proxyUgi = 
UserGroupInformation.createProxyUser(usrName,
-            UserGroupInformation.getLoginUser());
-
-        return proxyUgi.doAs(new PrivilegedExceptionAction<FileSystem>() {
-            @Override public FileSystem run() throws Exception {
-                return FileSystem.get(fullUri, cfg);
-            }
-        });
-    }
-
-    /**
-     * Gets the key tab principal short name (e.g. "hdfs").
-     *
-     * @return The key tab principal.
-     */
-    @Nullable public String getKeyTabPrincipal() {
-        return keyTabPrincipal;
-    }
-
-    /**
-     * Set the key tab principal name. See {@link #getKeyTabPrincipal()} for 
more information.
-     *
-     * @param keyTabPrincipal The key tab principal name.
-     */
-    public void setKeyTabPrincipal(@Nullable String keyTabPrincipal) {
-        this.keyTabPrincipal = keyTabPrincipal;
-    }
-
-    /**
-     * Gets the key tab full file name (e.g. 
"/etc/security/keytabs/hdfs.headless.keytab" or "/etc/krb5.keytab").
-     * <p>
-     * <b>NOTE!</b> Factory can be serialized and transferred to other 
machines where instance of
-     * {@link IgniteHadoopFileSystem} resides. Corresponding path must exist 
on these machines as well.
-     *
-     * @return The key tab file name.
-     */
-    @Nullable public String getKeyTab() {
-        return keyTab;
-    }
-
-    /**
-     * Sets the key tab file name. See {@link #getKeyTab()} for more 
information.
-     *
-     * @param keyTab The key tab file name.
-     */
-    public void setKeyTab(@Nullable String keyTab) {
-        this.keyTab = keyTab;
-    }
-
-    /**
-     * The interval used to re-login from the key tab, in milliseconds.
-     * Important that the value should not be larger than the Kerberos ticket 
life time multiplied by 0.2. This is
-     * because the ticket renew window starts from {@code 0.8 * ticket life 
time}.
-     * Default ticket life time is 1 day (24 hours), so the default re-login 
interval (10 min)
-     * is obeys this rule well.
-     *
-     * <p>Zero value means that re-login should be attempted on each file 
system operation.
-     * Negative values are not allowed.
-     *
-     * <p>Note, however, that it does not make sense to make this value small, 
because Hadoop does not allow to
-     * login if less than {@link 
org.apache.hadoop.security.UserGroupInformation#MIN_TIME_BEFORE_RELOGIN} 
milliseconds
-     * have passed since the time of the previous login.
-     * See {@link 
org.apache.hadoop.security.UserGroupInformation#hasSufficientTimeElapsed(long)} 
and its usages for
-     * more detail.
-     *
-     * @return The re-login interval, in milliseconds.
-     */
-    public long getReloginInterval() {
-        return reloginInterval;
-    }
-
-    /**
-     * Sets the relogin interval in milliseconds. See {@link 
#getReloginInterval()} for more information.
-     *
-     * @param reloginInterval The re-login interval, in milliseconds.
-     */
-    public void setReloginInterval(long reloginInterval) {
-        this.reloginInterval = reloginInterval;
-    }
-
-    /** {@inheritDoc} */
-    @Override public void start() throws IgniteException {
-        A.ensure(!F.isEmpty(keyTab), "keyTab cannot not be empty.");
-        A.ensure(!F.isEmpty(keyTabPrincipal), "keyTabPrincipal cannot not be 
empty.");
-        A.ensure(reloginInterval >= 0, "reloginInterval cannot not be 
negative.");
-
-        super.start();
-
-        try {
-            UserGroupInformation.setConfiguration(cfg);
-            UserGroupInformation.loginUserFromKeytab(keyTabPrincipal, keyTab);
-        }
-        catch (IOException ioe) {
-            throw new IgniteException("Failed login from keytab [keyTab=" + 
keyTab +
-                ", keyTabPrincipal=" + keyTabPrincipal + ']', ioe);
-        }
-    }
-
-    /**
-     * Re-logins the user if needed.
-     * First, the re-login interval defined in factory is checked. The 
re-login attempts will be not more
-     * frequent than one attempt per {@code reloginInterval}.
-     * Second, {@link UserGroupInformation#checkTGTAndReloginFromKeytab()} 
method invoked that gets existing
-     * TGT and checks its validity. If the TGT is expired or is close to 
expiry, it performs re-login.
-     *
-     * <p>This operation expected to be called upon each operation with the 
file system created with the factory.
-     * As long as {@link #get(String)} operation is invoked upon each file 
{@link IgniteHadoopFileSystem}, there
-     * is no need to invoke it otherwise specially.
-     *
-     * @throws IOException If login fails.
-     */
-    private void reloginIfNeeded() throws IOException {
-        long now = System.currentTimeMillis();
-
-        if (now >= lastReloginTime + reloginInterval) {
-            UserGroupInformation.getLoginUser().checkTGTAndReloginFromKeytab();
-
-            lastReloginTime = now;
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void writeExternal(ObjectOutput out) throws IOException {
-        super.writeExternal(out);
-
-        U.writeString(out, keyTab);
-        U.writeString(out, keyTabPrincipal);
-        out.writeLong(reloginInterval);
-    }
-
-    /** {@inheritDoc} */
-    @Override public void readExternal(ObjectInput in) throws IOException, 
ClassNotFoundException {
-        super.readExternal(in);
-
-        keyTab = U.readString(in);
-        keyTabPrincipal = U.readString(in);
-        reloginInterval = in.readLong();
-    }
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/857cdcde/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/package-info.java
----------------------------------------------------------------------
diff --git 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/package-info.java 
b/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/package-info.java
deleted file mode 100644
index 164801f..0000000
--- a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/package-info.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * 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 description. -->
- * Ignite Hadoop Accelerator file system API.
- */
-package org.apache.ignite.hadoop.fs;
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/857cdcde/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/IgniteHadoopFileSystem.java
----------------------------------------------------------------------
diff --git 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/IgniteHadoopFileSystem.java
 
b/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/IgniteHadoopFileSystem.java
deleted file mode 100644
index a06129e..0000000
--- 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/IgniteHadoopFileSystem.java
+++ /dev/null
@@ -1,1364 +0,0 @@
-/*
- * 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.ignite.hadoop.fs.v1;
-
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.BlockLocation;
-import org.apache.hadoop.fs.ContentSummary;
-import org.apache.hadoop.fs.FSDataInputStream;
-import org.apache.hadoop.fs.FSDataOutputStream;
-import org.apache.hadoop.fs.FileStatus;
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.InvalidPathException;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.hdfs.DFSUtil;
-import org.apache.hadoop.security.UserGroupInformation;
-import org.apache.hadoop.util.Progressable;
-import org.apache.ignite.IgniteCheckedException;
-import org.apache.ignite.IgniteException;
-import org.apache.ignite.configuration.FileSystemConfiguration;
-import org.apache.ignite.hadoop.fs.HadoopFileSystemFactory;
-import org.apache.ignite.hadoop.fs.IgniteHadoopIgfsSecondaryFileSystem;
-import org.apache.ignite.igfs.IgfsBlockLocation;
-import org.apache.ignite.igfs.IgfsException;
-import org.apache.ignite.igfs.IgfsFile;
-import org.apache.ignite.igfs.IgfsMode;
-import org.apache.ignite.igfs.IgfsPath;
-import org.apache.ignite.igfs.IgfsPathSummary;
-import org.apache.ignite.internal.igfs.common.IgfsLogger;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsInputStream;
-import 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsOutputStream;
-import 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsProxyInputStream;
-import 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsProxyOutputStream;
-import 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsStreamDelegate;
-import org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsWrapper;
-import org.apache.ignite.internal.processors.igfs.IgfsHandshakeResponse;
-import org.apache.ignite.internal.processors.igfs.IgfsModeResolver;
-import org.apache.ignite.internal.processors.igfs.IgfsPaths;
-import org.apache.ignite.internal.processors.igfs.IgfsUtils;
-import org.apache.ignite.internal.util.typedef.F;
-import org.apache.ignite.internal.util.typedef.T2;
-import org.apache.ignite.internal.util.typedef.X;
-import org.apache.ignite.internal.util.typedef.internal.A;
-import org.apache.ignite.internal.util.typedef.internal.S;
-import org.apache.ignite.internal.util.typedef.internal.U;
-import org.apache.ignite.lifecycle.LifecycleAware;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.net.URI;
-import java.net.URISyntaxException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-import static 
org.apache.ignite.configuration.FileSystemConfiguration.DFLT_IGFS_LOG_BATCH_SIZE;
-import static 
org.apache.ignite.configuration.FileSystemConfiguration.DFLT_IGFS_LOG_DIR;
-import static org.apache.ignite.igfs.IgfsMode.PROXY;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_COLOCATED_WRITES;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_LOG_BATCH_SIZE;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_LOG_DIR;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_LOG_ENABLED;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_PREFER_LOCAL_WRITES;
-import static 
org.apache.ignite.internal.processors.hadoop.fs.HadoopParameters.PARAM_IGFS_SEQ_READS_BEFORE_PREFETCH;
-import static 
org.apache.ignite.internal.processors.hadoop.igfs.HadoopIgfsUtils.parameter;
-import static org.apache.ignite.internal.processors.igfs.IgfsEx.IGFS_SCHEME;
-
-/**
- * {@code IGFS} Hadoop 1.x file system driver over file system API. To use
- * {@code IGFS} as Hadoop file system, you should configure this class
- * in Hadoop's {@code core-site.xml} as follows:
- * <pre name="code" class="xml">
- *  &lt;property&gt;
- *      &lt;name&gt;fs.default.name&lt;/name&gt;
- *      &lt;value&gt;igfs:///&lt;/value&gt;
- *  &lt;/property&gt;
- *
- *  &lt;property&gt;
- *      &lt;name&gt;fs.igfs.impl&lt;/name&gt;
- *      
&lt;value&gt;org.apache.ignite.hadoop.fs.v1.IgniteHadoopFileSystem&lt;/value&gt;
- *  &lt;/property&gt;
- * </pre>
- * You should also add Ignite JAR and all libraries to Hadoop classpath. To
- * do this, add following lines to {@code conf/hadoop-env.sh} script in Hadoop
- * distribution:
- * <pre name="code" class="bash">
- * export IGNITE_HOME=/path/to/Ignite/distribution
- * export HADOOP_CLASSPATH=$IGNITE_HOME/ignite*.jar
- *
- * for f in $IGNITE_HOME/libs/*.jar; do
- *  export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f;
- * done
- * </pre>
- * <h1 class="header">Data vs Clients Nodes</h1>
- * Hadoop needs to use its FileSystem remotely from client nodes as well as 
directly on
- * data nodes. Client nodes are responsible for basic file system operations 
as well as
- * accessing data nodes remotely. Usually, client nodes are started together
- * with {@code job-submitter} or {@code job-scheduler} processes, while data 
nodes are usually
- * started together with Hadoop {@code task-tracker} processes.
- * <p>
- * For sample client and data node configuration refer to {@code 
config/hadoop/default-config-client.xml}
- * and {@code config/hadoop/default-config.xml} configuration files in Ignite 
installation.
- */
-public class IgniteHadoopFileSystem extends FileSystem {
-    /** Internal property to indicate management connection. */
-    public static final String IGFS_MANAGEMENT = 
"fs.igfs.management.connection";
-
-    /** Empty array of file block locations. */
-    private static final BlockLocation[] EMPTY_BLOCK_LOCATIONS = new 
BlockLocation[0];
-
-    /** Empty array of file statuses. */
-    public static final FileStatus[] EMPTY_FILE_STATUS = new FileStatus[0];
-
-    /** Ensures that close routine is invoked at most once. */
-    private final AtomicBoolean closeGuard = new AtomicBoolean();
-
-    /** Grid remote client. */
-    private HadoopIgfsWrapper rmtClient;
-
-    /** working directory. */
-    private Path workingDir;
-
-    /** Default replication factor. */
-    private short dfltReplication;
-
-    /** Base file system uri. */
-    @SuppressWarnings("FieldAccessedSynchronizedAndUnsynchronized")
-    private URI uri;
-
-    /** Authority. */
-    private String uriAuthority;
-
-    /** Client logger. */
-    private IgfsLogger clientLog;
-
-    /** Secondary URI string. */
-    private URI secondaryUri;
-
-    /** The user name this file system was created on behalf of. */
-    private String user;
-
-    /** IGFS mode resolver. */
-    private IgfsModeResolver modeRslvr;
-
-    /** The secondary file system factory. */
-    private HadoopFileSystemFactory factory;
-
-    /** Management connection flag. */
-    private boolean mgmt;
-
-    /** Whether custom sequential reads before prefetch value is provided. */
-    private boolean seqReadsBeforePrefetchOverride;
-
-    /** IGFS group block size. */
-    private long igfsGrpBlockSize;
-
-    /** Flag that controls whether file writes should be colocated. */
-    private boolean colocateFileWrites;
-
-    /** Prefer local writes. */
-    private boolean preferLocFileWrites;
-
-    /** Custom-provided sequential reads before prefetch. */
-    private int seqReadsBeforePrefetch;
-
-    /** {@inheritDoc} */
-    @Override public URI getUri() {
-        if (uri == null)
-            throw new IllegalStateException("URI is null (was 
IgniteHadoopFileSystem properly initialized?).");
-
-        return uri;
-    }
-
-    /**
-     * Enter busy state.
-     *
-     * @throws IOException If file system is stopped.
-     */
-    private void enterBusy() throws IOException {
-        if (closeGuard.get())
-            throw new IOException("File system is stopped.");
-    }
-
-    /**
-     * Leave busy state.
-     */
-    private void leaveBusy() {
-        // No-op.
-    }
-
-    /**
-     * Gets non-null user name as per the Hadoop file system viewpoint.
-     * @return the user name, never null.
-     */
-    public static String getFsHadoopUser() throws IOException {
-        UserGroupInformation currUgi = UserGroupInformation.getCurrentUser();
-
-        String user = currUgi.getShortUserName();
-
-        user = IgfsUtils.fixUserName(user);
-
-        assert user != null;
-
-        return user;
-    }
-
-    /**
-     * Public setter that can be used by direct users of FS or Visor.
-     *
-     * @param colocateFileWrites Whether all ongoing file writes should be 
colocated.
-     */
-    @SuppressWarnings("UnusedDeclaration")
-    public void colocateFileWrites(boolean colocateFileWrites) {
-        this.colocateFileWrites = colocateFileWrites;
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("ConstantConditions")
-    @Override public void initialize(URI name, Configuration cfg) throws 
IOException {
-        enterBusy();
-
-        try {
-            if (rmtClient != null)
-                throw new IOException("File system is already initialized: " + 
rmtClient);
-
-            A.notNull(name, "name");
-            A.notNull(cfg, "cfg");
-
-            super.initialize(name, cfg);
-
-            setConf(cfg);
-
-            mgmt = cfg.getBoolean(IGFS_MANAGEMENT, false);
-
-            if (!IGFS_SCHEME.equals(name.getScheme()))
-                throw new IOException("Illegal file system URI [expected=" + 
IGFS_SCHEME +
-                    "://[name]/[optional_path], actual=" + name + ']');
-
-            uri = name;
-
-            uriAuthority = uri.getAuthority();
-
-            user = getFsHadoopUser();
-
-            // Override sequential reads before prefetch if needed.
-            seqReadsBeforePrefetch = parameter(cfg, 
PARAM_IGFS_SEQ_READS_BEFORE_PREFETCH, uriAuthority, 0);
-
-            if (seqReadsBeforePrefetch > 0)
-                seqReadsBeforePrefetchOverride = true;
-
-            // In Ignite replication factor is controlled by data cache 
affinity.
-            // We use replication factor to force the whole file to be stored 
on local node.
-            dfltReplication = (short)cfg.getInt("dfs.replication", 3);
-
-            // Get file colocation control flag.
-            colocateFileWrites = parameter(cfg, PARAM_IGFS_COLOCATED_WRITES, 
uriAuthority, false);
-            preferLocFileWrites = 
cfg.getBoolean(PARAM_IGFS_PREFER_LOCAL_WRITES, false);
-
-            // Get log directory.
-            String logDirCfg = parameter(cfg, PARAM_IGFS_LOG_DIR, 
uriAuthority, DFLT_IGFS_LOG_DIR);
-
-            File logDirFile = U.resolveIgnitePath(logDirCfg);
-
-            String logDir = logDirFile != null ? logDirFile.getAbsolutePath() 
: null;
-
-            rmtClient = new HadoopIgfsWrapper(uriAuthority, logDir, cfg, LOG, 
user);
-
-            // Handshake.
-            IgfsHandshakeResponse handshake = rmtClient.handshake(logDir);
-
-            igfsGrpBlockSize = handshake.blockSize();
-
-            IgfsPaths paths = handshake.secondaryPaths();
-
-            // Initialize client logger.
-            Boolean logEnabled = parameter(cfg, PARAM_IGFS_LOG_ENABLED, 
uriAuthority, false);
-
-            if (handshake.sampling() != null ? handshake.sampling() : 
logEnabled) {
-                // Initiate client logger.
-                if (logDir == null)
-                    throw new IOException("Failed to resolve log directory: " 
+ logDirCfg);
-
-                Integer batchSize = parameter(cfg, PARAM_IGFS_LOG_BATCH_SIZE, 
uriAuthority, DFLT_IGFS_LOG_BATCH_SIZE);
-
-                clientLog = IgfsLogger.logger(uriAuthority, 
handshake.igfsName(), logDir, batchSize);
-            }
-            else
-                clientLog = IgfsLogger.disabledLogger();
-
-            try {
-                modeRslvr = new IgfsModeResolver(paths.defaultMode(), 
paths.pathModes());
-            }
-            catch (IgniteCheckedException ice) {
-                throw new IOException(ice);
-            }
-
-            boolean initSecondary = paths.defaultMode() == PROXY;
-
-            if (!initSecondary && paths.pathModes() != null && 
!paths.pathModes().isEmpty()) {
-                for (T2<IgfsPath, IgfsMode> pathMode : paths.pathModes()) {
-                    IgfsMode mode = pathMode.getValue();
-
-                    if (mode == PROXY) {
-                        initSecondary = true;
-
-                        break;
-                    }
-                }
-            }
-
-            if (initSecondary) {
-                try {
-                    factory = (HadoopFileSystemFactory) 
paths.getPayload(getClass().getClassLoader());
-                }
-                catch (IgniteCheckedException e) {
-                    throw new IOException("Failed to get secondary file system 
factory.", e);
-                }
-
-                if (factory == null)
-                    throw new IOException("Failed to get secondary file system 
factory (did you set " +
-                        IgniteHadoopIgfsSecondaryFileSystem.class.getName() + 
" as \"secondaryFIleSystem\" in " +
-                        FileSystemConfiguration.class.getName() + "?)");
-
-                if (factory instanceof LifecycleAware)
-                    ((LifecycleAware) factory).start();
-
-                try {
-                    FileSystem secFs = factory.get(user);
-
-                    secondaryUri = secFs.getUri();
-
-                    A.ensure(secondaryUri != null, "Secondary file system uri 
should not be null.");
-                }
-                catch (IOException e) {
-                    if (!mgmt)
-                        throw new IOException("Failed to connect to the 
secondary file system: " + secondaryUri, e);
-                    else
-                        LOG.warn("Visor failed to create secondary file system 
(operations on paths with PROXY mode " +
-                            "will have no effect): " + e.getMessage());
-                }
-            }
-
-            // set working directory to the home directory of the current Fs 
user:
-            setWorkingDirectory(null);
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void checkPath(Path path) {
-        URI uri = path.toUri();
-
-        if (uri.isAbsolute()) {
-            if (!F.eq(uri.getScheme(), IGFS_SCHEME))
-                throw new InvalidPathException("Wrong path scheme [expected=" 
+ IGFS_SCHEME + ", actual=" +
-                    uri.getAuthority() + ']');
-
-            if (!F.eq(uri.getAuthority(), uriAuthority))
-                throw new InvalidPathException("Wrong path authority 
[expected=" + uriAuthority + ", actual=" +
-                    uri.getAuthority() + ']');
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("deprecation")
-    @Override public short getDefaultReplication() {
-        return dfltReplication;
-    }
-
-    /** {@inheritDoc} */
-    @Override protected void finalize() throws Throwable {
-        super.finalize();
-
-        close();
-    }
-
-    /** {@inheritDoc} */
-    @Override public void close() throws IOException {
-        if (closeGuard.compareAndSet(false, true))
-            close0();
-    }
-
-    /**
-     * Closes file system.
-     *
-     * @throws IOException If failed.
-     */
-    private void close0() throws IOException {
-        if (LOG.isDebugEnabled())
-            LOG.debug("File system closed [uri=" + uri + ", endpoint=" + 
uriAuthority + ']');
-
-        if (rmtClient == null)
-            return;
-
-        super.close();
-
-        rmtClient.close(false);
-
-        if (clientLog.isLogEnabled())
-            clientLog.close();
-
-        if (factory instanceof LifecycleAware)
-            ((LifecycleAware) factory).stop();
-
-        // Reset initialized resources.
-        uri = null;
-        rmtClient = null;
-    }
-
-    /** {@inheritDoc} */
-    @Override public void setTimes(Path p, long mtime, long atime) throws 
IOException {
-        enterBusy();
-
-        try {
-            A.notNull(p, "p");
-
-            if (mode(p) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    // No-op for management connection.
-                    return;
-                }
-
-                secondaryFs.setTimes(toSecondary(p), mtime, atime);
-            }
-            else {
-                IgfsPath path = convert(p);
-
-                rmtClient.setTimes(path, atime, mtime);
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void setPermission(Path p, FsPermission perm) throws 
IOException {
-        enterBusy();
-
-        try {
-            A.notNull(p, "p");
-
-            if (mode(p) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    // No-op for management connection.
-                    return;
-                }
-
-                secondaryFs.setPermission(toSecondary(p), perm);
-            }
-            else if (rmtClient.update(convert(p), permission(perm)) == null) {
-                throw new IOException("Failed to set file permission (file not 
found?)" +
-                    " [path=" + p + ", perm=" + perm + ']');
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public void setOwner(Path p, String username, String grpName) 
throws IOException {
-        A.notNull(p, "p");
-        A.notNull(username, "username");
-        A.notNull(grpName, "grpName");
-
-        enterBusy();
-
-        try {
-            if (mode(p) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    // No-op for management connection.
-                    return;
-                }
-
-                secondaryFs.setOwner(toSecondary(p), username, grpName);
-            }
-            else if (rmtClient.update(convert(p), 
F.asMap(IgfsUtils.PROP_USER_NAME, username,
-                IgfsUtils.PROP_GROUP_NAME, grpName)) == null) {
-                throw new IOException("Failed to set file permission (file not 
found?)" +
-                    " [path=" + p + ", userName=" + username + ", groupName=" 
+ grpName + ']');
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public FSDataInputStream open(Path f, int bufSize) throws 
IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    throw new IOException("Failed to open file (secondary file 
system is not initialized): " + f);
-                }
-
-                FSDataInputStream is = secondaryFs.open(toSecondary(f), 
bufSize);
-
-                if (clientLog.isLogEnabled()) {
-                    // At this point we do not know file size, so we perform 
additional request to remote FS to get it.
-                    FileStatus status = 
secondaryFs.getFileStatus(toSecondary(f));
-
-                    long size = status != null ? status.getLen() : -1;
-
-                    long logId = IgfsLogger.nextId();
-
-                    clientLog.logOpen(logId, path, PROXY, bufSize, size);
-
-                    return new FSDataInputStream(new 
HadoopIgfsProxyInputStream(is, clientLog, logId));
-                }
-                else
-                    return is;
-            }
-            else {
-                HadoopIgfsStreamDelegate stream = 
seqReadsBeforePrefetchOverride ?
-                    rmtClient.open(path, seqReadsBeforePrefetch) : 
rmtClient.open(path);
-
-                long logId = -1;
-
-                if (clientLog.isLogEnabled()) {
-                    logId = IgfsLogger.nextId();
-
-                    clientLog.logOpen(logId, path, mode, bufSize, 
stream.length());
-                }
-
-                if (LOG.isDebugEnabled())
-                    LOG.debug("Opening input stream [thread=" + 
Thread.currentThread().getName() + ", path=" + path +
-                        ", bufSize=" + bufSize + ']');
-
-                HadoopIgfsInputStream igfsIn = new 
HadoopIgfsInputStream(stream, stream.length(),
-                    bufSize, LOG, clientLog, logId);
-
-                if (LOG.isDebugEnabled())
-                    LOG.debug("Opened input stream [path=" + path + ", 
delegate=" + stream + ']');
-
-                return new FSDataInputStream(igfsIn);
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("deprecation")
-    @Override public FSDataOutputStream create(Path f, final FsPermission 
perm, boolean overwrite, int bufSize,
-        short replication, long blockSize, Progressable progress) throws 
IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        OutputStream out = null;
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (LOG.isDebugEnabled())
-                LOG.debug("Opening output stream in create [thread=" + 
Thread.currentThread().getName() + "path=" +
-                    path + ", overwrite=" + overwrite + ", bufSize=" + bufSize 
+ ']');
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    throw new IOException("Failed to create file (secondary 
file system is not initialized): " + f);
-                }
-
-                FSDataOutputStream os =
-                    secondaryFs.create(toSecondary(f), perm, overwrite, 
bufSize, replication, blockSize, progress);
-
-                if (clientLog.isLogEnabled()) {
-                    long logId = IgfsLogger.nextId();
-
-                    clientLog.logCreate(logId, path, PROXY, overwrite, 
bufSize, replication, blockSize);
-
-                    return new FSDataOutputStream(new 
HadoopIgfsProxyOutputStream(os, clientLog, logId));
-                }
-                else
-                    return os;
-            }
-            else {
-                Map<String,String> propMap = permission(perm);
-
-                propMap.put(IgfsUtils.PROP_PREFER_LOCAL_WRITES, 
Boolean.toString(preferLocFileWrites));
-
-                // Create stream and close it in the 'finally' section if any 
sequential operation failed.
-                HadoopIgfsStreamDelegate stream = rmtClient.create(path, 
overwrite, colocateFileWrites,
-                    replication, blockSize, propMap);
-
-                assert stream != null;
-
-                long logId = -1;
-
-                if (clientLog.isLogEnabled()) {
-                    logId = IgfsLogger.nextId();
-
-                    clientLog.logCreate(logId, path, mode, overwrite, bufSize, 
replication, blockSize);
-                }
-
-                if (LOG.isDebugEnabled())
-                    LOG.debug("Opened output stream in create [path=" + path + 
", delegate=" + stream + ']');
-
-                HadoopIgfsOutputStream igfsOut = new 
HadoopIgfsOutputStream(stream, LOG, clientLog,
-                    logId);
-
-                bufSize = Math.max(64 * 1024, bufSize);
-
-                out = new BufferedOutputStream(igfsOut, bufSize);
-
-                FSDataOutputStream res = new FSDataOutputStream(out, null, 0);
-
-                // Mark stream created successfully.
-                out = null;
-
-                return res;
-            }
-        }
-        finally {
-            // Close if failed during stream creation.
-            if (out != null)
-                U.closeQuiet(out);
-
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("deprecation")
-    @Override public FSDataOutputStream append(Path f, int bufSize, 
Progressable progress) throws IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (LOG.isDebugEnabled())
-                LOG.debug("Opening output stream in append [thread=" + 
Thread.currentThread().getName() +
-                    ", path=" + path + ", bufSize=" + bufSize + ']');
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    throw new IOException("Failed to append file (secondary 
file system is not initialized): " + f);
-                }
-
-                FSDataOutputStream os = secondaryFs.append(toSecondary(f), 
bufSize, progress);
-
-                if (clientLog.isLogEnabled()) {
-                    long logId = IgfsLogger.nextId();
-
-                    clientLog.logAppend(logId, path, PROXY, bufSize); // Don't 
have stream ID.
-
-                    return new FSDataOutputStream(new 
HadoopIgfsProxyOutputStream(os, clientLog, logId));
-                }
-                else
-                    return os;
-            }
-            else {
-                HadoopIgfsStreamDelegate stream = rmtClient.append(path, 
false, null);
-
-                assert stream != null;
-
-                long logId = -1;
-
-                if (clientLog.isLogEnabled()) {
-                    logId = IgfsLogger.nextId();
-
-                    clientLog.logAppend(logId, path, mode, bufSize);
-                }
-
-                if (LOG.isDebugEnabled())
-                    LOG.debug("Opened output stream in append [path=" + path + 
", delegate=" + stream + ']');
-
-                HadoopIgfsOutputStream igfsOut = new 
HadoopIgfsOutputStream(stream, LOG, clientLog,
-                    logId);
-
-                bufSize = Math.max(64 * 1024, bufSize);
-
-                BufferedOutputStream out = new BufferedOutputStream(igfsOut, 
bufSize);
-
-                return new FSDataOutputStream(out, null, 0);
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("unchecked")
-    @Override public boolean rename(Path src, Path dst) throws IOException {
-        A.notNull(src, "src");
-        A.notNull(dst, "dst");
-
-        enterBusy();
-
-        try {
-            IgfsPath srcPath = convert(src);
-            IgfsPath dstPath = convert(dst);
-            IgfsMode mode = mode(srcPath);
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    return false;
-                }
-
-                if (clientLog.isLogEnabled())
-                    clientLog.logRename(srcPath, PROXY, dstPath);
-
-                return secondaryFs.rename(toSecondary(src), toSecondary(dst));
-            }
-            else {
-                if (clientLog.isLogEnabled())
-                    clientLog.logRename(srcPath, mode, dstPath);
-
-                try {
-                    rmtClient.rename(srcPath, dstPath);
-                }
-                catch (IOException ioe) {
-                    // Log the exception before rethrowing since it may be 
ignored:
-                    LOG.warn("Failed to rename [srcPath=" + srcPath + ", 
dstPath=" + dstPath + ", mode=" + mode + ']',
-                        ioe);
-
-                    throw ioe;
-                }
-
-                return true;
-            }
-        }
-        catch (IOException e) {
-            // Intentionally ignore IGFS exceptions here to follow Hadoop 
contract.
-            if (F.eq(IOException.class, e.getClass()) && (e.getCause() == null 
||
-                !X.hasCause(e.getCause(), IgfsException.class)))
-                throw e;
-            else
-                return false;
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("deprecation")
-    @Override public boolean delete(Path f) throws IOException {
-        return delete(f, false);
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("unchecked")
-    @Override public boolean delete(Path f, boolean recursive) throws 
IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    return false;
-                }
-
-                if (clientLog.isLogEnabled())
-                    clientLog.logDelete(path, PROXY, recursive);
-
-                return secondaryFs.delete(toSecondary(f), recursive);
-            }
-            else {
-                // Will throw exception if delete failed.
-                boolean res = rmtClient.delete(path, recursive);
-
-                if (clientLog.isLogEnabled())
-                    clientLog.logDelete(path, mode, recursive);
-
-                return res;
-            }
-        }
-        catch (IOException e) {
-            // Intentionally ignore IGFS exceptions here to follow Hadoop 
contract.
-            if (F.eq(IOException.class, e.getClass()) && (e.getCause() == null 
||
-                !X.hasCause(e.getCause(), IgfsException.class)))
-                throw e;
-            else
-                return false;
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public FileStatus[] listStatus(Path f) throws IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    return EMPTY_FILE_STATUS;
-                }
-
-                FileStatus[] arr = secondaryFs.listStatus(toSecondary(f));
-
-                if (arr == null)
-                    throw new FileNotFoundException("File " + f + " does not 
exist.");
-
-                for (int i = 0; i < arr.length; i++)
-                    arr[i] = toPrimary(arr[i]);
-
-                if (clientLog.isLogEnabled()) {
-                    String[] fileArr = new String[arr.length];
-
-                    for (int i = 0; i < arr.length; i++)
-                        fileArr[i] = arr[i].getPath().toString();
-
-                    clientLog.logListDirectory(path, PROXY, fileArr);
-                }
-
-                return arr;
-            }
-            else {
-                Collection<IgfsFile> list = rmtClient.listFiles(path);
-
-                if (list == null)
-                    throw new FileNotFoundException("File " + f + " does not 
exist.");
-
-                List<IgfsFile> files = new ArrayList<>(list);
-
-                FileStatus[] arr = new FileStatus[files.size()];
-
-                for (int i = 0; i < arr.length; i++)
-                    arr[i] = convert(files.get(i));
-
-                if (clientLog.isLogEnabled()) {
-                    String[] fileArr = new String[arr.length];
-
-                    for (int i = 0; i < arr.length; i++)
-                        fileArr[i] = arr[i].getPath().toString();
-
-                    clientLog.logListDirectory(path, mode, fileArr);
-                }
-
-                return arr;
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public Path getHomeDirectory() {
-        Path path = new Path("/user/" + user);
-
-        return path.makeQualified(getUri(), null);
-    }
-
-    /** {@inheritDoc} */
-    @Override public void setWorkingDirectory(Path newPath) {
-        try {
-            if (newPath == null) {
-                Path homeDir = getHomeDirectory();
-
-                FileSystem secondaryFs  = secondaryFileSystem();
-
-                if (secondaryFs != null)
-                    secondaryFs.setWorkingDirectory(toSecondary(homeDir));
-
-                workingDir = homeDir;
-            }
-            else {
-                Path fixedNewPath = fixRelativePart(newPath);
-
-                String res = fixedNewPath.toUri().getPath();
-
-                if (!DFSUtil.isValidName(res))
-                    throw new IllegalArgumentException("Invalid DFS directory 
name " + res);
-
-                FileSystem secondaryFs  = secondaryFileSystem();
-
-                if (secondaryFs != null)
-                    secondaryFs.setWorkingDirectory(toSecondary(fixedNewPath));
-
-                workingDir = fixedNewPath;
-            }
-        }
-        catch (IOException e) {
-            throw new RuntimeException("Failed to obtain secondary file system 
instance.", e);
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public Path getWorkingDirectory() {
-        return workingDir;
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("unchecked")
-    @Override public boolean mkdirs(Path f, FsPermission perm) throws 
IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(f);
-            IgfsMode mode = mode(path);
-
-            if (mode == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    return false;
-                }
-
-                if (clientLog.isLogEnabled())
-                    clientLog.logMakeDirectory(path, PROXY);
-
-                return secondaryFs.mkdirs(toSecondary(f), perm);
-            }
-            else {
-                boolean mkdirRes = rmtClient.mkdirs(path, permission(perm));
-
-                if (clientLog.isLogEnabled())
-                    clientLog.logMakeDirectory(path, mode);
-
-                return mkdirRes;
-            }
-        }
-        catch (IOException e) {
-            // Intentionally ignore IGFS exceptions here to follow Hadoop 
contract.
-            if (F.eq(IOException.class, e.getClass()) && (e.getCause() == null 
||
-                !X.hasCause(e.getCause(), IgfsException.class)))
-                throw e;
-            else
-                return false;
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public FileStatus getFileStatus(Path f) throws IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            if (mode(f) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    throw new IOException("Failed to get file status 
(secondary file system is not initialized): " + f);
-                }
-
-                return toPrimary(secondaryFs.getFileStatus(toSecondary(f)));
-            }
-            else {
-                IgfsFile info = rmtClient.info(convert(f));
-
-                if (info == null)
-                    throw new FileNotFoundException("File not found: " + f);
-
-                return convert(info);
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public ContentSummary getContentSummary(Path f) throws 
IOException {
-        A.notNull(f, "f");
-
-        enterBusy();
-
-        try {
-            if (mode(f) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    throw new IOException("Failed to get content summary 
(secondary file system is not initialized): " +
-                        f);
-                }
-
-                return secondaryFs.getContentSummary(toSecondary(f));
-            }
-            else {
-                IgfsPathSummary sum = rmtClient.contentSummary(convert(f));
-
-                return new ContentSummary(sum.totalLength(), sum.filesCount(), 
sum.directoriesCount(),
-                    -1, sum.totalLength(), rmtClient.fsStatus().spaceTotal());
-            }
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public BlockLocation[] getFileBlockLocations(FileStatus status, 
long start, long len) throws IOException {
-        A.notNull(status, "status");
-
-        enterBusy();
-
-        try {
-            IgfsPath path = convert(status.getPath());
-
-            if (mode(status.getPath()) == PROXY) {
-                final FileSystem secondaryFs = secondaryFileSystem();
-
-                if (secondaryFs == null) {
-                    assert mgmt;
-
-                    return EMPTY_BLOCK_LOCATIONS;
-                }
-
-                Path secPath = toSecondary(status.getPath());
-
-                return 
secondaryFs.getFileBlockLocations(secondaryFs.getFileStatus(secPath), start, 
len);
-            }
-            else {
-                long now = System.currentTimeMillis();
-
-                List<IgfsBlockLocation> affinity = new 
ArrayList<>(rmtClient.affinity(path, start, len));
-
-                BlockLocation[] arr = new BlockLocation[affinity.size()];
-
-                for (int i = 0; i < arr.length; i++)
-                    arr[i] = convert(affinity.get(i));
-
-                if (LOG.isDebugEnabled())
-                    LOG.debug("Fetched file locations [path=" + path + ", 
fetchTime=" +
-                        (System.currentTimeMillis() - now) + ", locations=" + 
Arrays.asList(arr) + ']');
-
-                return arr;
-            }
-        }
-        catch (FileNotFoundException ignored) {
-            return EMPTY_BLOCK_LOCATIONS;
-        }
-        finally {
-            leaveBusy();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @SuppressWarnings("deprecation")
-    @Override public long getDefaultBlockSize() {
-        return igfsGrpBlockSize;
-    }
-
-    /**
-     * Resolve path mode.
-     *
-     * @param path HDFS path.
-     * @return Path mode.
-     */
-    public IgfsMode mode(Path path) {
-        return mode(convert(path));
-    }
-
-    /**
-     * Resolve path mode.
-     *
-     * @param path IGFS path.
-     * @return Path mode.
-     */
-    public IgfsMode mode(IgfsPath path) {
-        return modeRslvr.resolveMode(path);
-    }
-
-    /**
-     * @return {@code true} If secondary file system is initialized.
-     */
-    public boolean hasSecondaryFileSystem() {
-        return factory != null;
-    }
-
-    /**
-     * Convert the given path to path acceptable by the primary file system.
-     *
-     * @param path Path.
-     * @return Primary file system path.
-     */
-    private Path toPrimary(Path path) {
-        return convertPath(path, uri);
-    }
-
-    /**
-     * Convert the given path to path acceptable by the secondary file system.
-     *
-     * @param path Path.
-     * @return Secondary file system path.
-     */
-    private Path toSecondary(Path path) {
-        assert factory != null;
-        assert secondaryUri != null;
-
-        return convertPath(path, secondaryUri);
-    }
-
-    /**
-     * Convert path using the given new URI.
-     *
-     * @param path Old path.
-     * @param newUri New URI.
-     * @return New path.
-     */
-    private Path convertPath(Path path, URI newUri) {
-        assert newUri != null;
-
-        if (path != null) {
-            URI pathUri = path.toUri();
-
-            try {
-                return new Path(new URI(pathUri.getScheme() != null ? 
newUri.getScheme() : null,
-                    pathUri.getAuthority() != null ? newUri.getAuthority() : 
null, pathUri.getPath(), null, null));
-            }
-            catch (URISyntaxException e) {
-                throw new IgniteException("Failed to construct secondary file 
system path from the primary file " +
-                    "system path: " + path, e);
-            }
-        }
-        else
-            return null;
-    }
-
-    /**
-     * Convert a file status obtained from the secondary file system to a 
status of the primary file system.
-     *
-     * @param status Secondary file system status.
-     * @return Primary file system status.
-     */
-    @SuppressWarnings("deprecation")
-    private FileStatus toPrimary(FileStatus status) {
-        return status != null ? new FileStatus(status.getLen(), 
status.isDir(), status.getReplication(),
-            status.getBlockSize(), status.getModificationTime(), 
status.getAccessTime(), status.getPermission(),
-            status.getOwner(), status.getGroup(), toPrimary(status.getPath())) 
: null;
-    }
-
-    /**
-     * Convert IGFS path into Hadoop path.
-     *
-     * @param path IGFS path.
-     * @return Hadoop path.
-     */
-    private Path convert(IgfsPath path) {
-        return new Path(IGFS_SCHEME, uriAuthority, path.toString());
-    }
-
-    /**
-     * Convert Hadoop path into IGFS path.
-     *
-     * @param path Hadoop path.
-     * @return IGFS path.
-     */
-    @Nullable private IgfsPath convert(@Nullable Path path) {
-        if (path == null)
-            return null;
-
-        return path.isAbsolute() ? new IgfsPath(path.toUri().getPath()) :
-            new IgfsPath(convert(workingDir), path.toUri().getPath());
-    }
-
-    /**
-     * Convert IGFS affinity block location into Hadoop affinity block 
location.
-     *
-     * @param block IGFS affinity block location.
-     * @return Hadoop affinity block location.
-     */
-    private BlockLocation convert(IgfsBlockLocation block) {
-        Collection<String> names = block.names();
-        Collection<String> hosts = block.hosts();
-
-        return new BlockLocation(
-            names.toArray(new String[names.size()]) /* hostname:portNumber of 
data nodes */,
-            hosts.toArray(new String[hosts.size()]) /* hostnames of data nodes 
*/,
-            block.start(), block.length()
-        ) {
-            @Override public String toString() {
-                try {
-                    return "BlockLocation [offset=" + getOffset() + ", 
length=" + getLength() +
-                        ", hosts=" + Arrays.asList(getHosts()) + ", names=" + 
Arrays.asList(getNames()) + ']';
-                }
-                catch (IOException e) {
-                    throw new RuntimeException(e);
-                }
-            }
-        };
-    }
-
-    /**
-     * Convert IGFS file information into Hadoop file status.
-     *
-     * @param file IGFS file information.
-     * @return Hadoop file status.
-     */
-    @SuppressWarnings("deprecation")
-    private FileStatus convert(IgfsFile file) {
-        return new FileStatus(
-            file.length(),
-            file.isDirectory(),
-            getDefaultReplication(),
-            file.groupBlockSize(),
-            file.modificationTime(),
-            file.accessTime(),
-            permission(file),
-            file.property(IgfsUtils.PROP_USER_NAME, user),
-            file.property(IgfsUtils.PROP_GROUP_NAME, "users"),
-            convert(file.path())) {
-            @Override public String toString() {
-                return "FileStatus [path=" + getPath() + ", isDir=" + isDir() 
+ ", len=" + getLen() +
-                    ", mtime=" + getModificationTime() + ", atime=" + 
getAccessTime() + ']';
-            }
-        };
-    }
-
-    /**
-     * Convert Hadoop permission into IGFS file attribute.
-     *
-     * @param perm Hadoop permission.
-     * @return IGFS attributes.
-     */
-    private Map<String, String> permission(FsPermission perm) {
-        if (perm == null)
-            perm = FsPermission.getDefault();
-
-        return F.asMap(IgfsUtils.PROP_PERMISSION, toString(perm));
-    }
-
-    /**
-     * @param perm Permission.
-     * @return String.
-     */
-    private static String toString(FsPermission perm) {
-        return String.format("%04o", perm.toShort());
-    }
-
-    /**
-     * Convert IGFS file attributes into Hadoop permission.
-     *
-     * @param file File info.
-     * @return Hadoop permission.
-     */
-    private FsPermission permission(IgfsFile file) {
-        String perm = file.property(IgfsUtils.PROP_PERMISSION, null);
-
-        if (perm == null)
-            return FsPermission.getDefault();
-
-        try {
-            return new FsPermission((short)Integer.parseInt(perm, 8));
-        }
-        catch (NumberFormatException ignore) {
-            return FsPermission.getDefault();
-        }
-    }
-
-    /** {@inheritDoc} */
-    @Override public String toString() {
-        return S.toString(IgniteHadoopFileSystem.class, this);
-    }
-
-    /**
-     * Returns the user name this File System is created on behalf of.
-     * @return the user name
-     */
-    public String user() {
-        return user;
-    }
-
-    /**
-     * Gets cached or creates a {@link FileSystem}.
-     *
-     * @return The secondary file system.
-     */
-    private @Nullable FileSystem secondaryFileSystem() throws IOException{
-        if (factory == null)
-            return null;
-
-        return factory.get(user);
-    }
-}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/ignite/blob/857cdcde/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/package-info.java
----------------------------------------------------------------------
diff --git 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/package-info.java 
b/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/package-info.java
deleted file mode 100644
index 60e62ca..0000000
--- 
a/modules/hadoop/src/main/java/org/apache/ignite/hadoop/fs/v1/package-info.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * 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 description. -->
- * Contains Ignite Hadoop 1.x <code>FileSystem</code> implementation.
- */
-package org.apache.ignite.hadoop.fs.v1;
\ No newline at end of file

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