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Apache Dubbo Submodules:

Apache Dubbo includes a number of submodules with separate copyright notices
and license terms. Your use of these submodules is subject to the terms and
conditions of the following licenses.

For the package org.apache.dubbo.common.threadlocal and org.apache.dubbo.common.timer:

This product contains a modified portion of 'Netty', an event-driven asynchronous network application framework also
 under a "Apache License 2.0" license, see https://github.com/netty/netty/blob/4.1/LICENSE.txt:

 * io.netty.util.concurrent.FastThreadLocal
 * io.netty.util.internal.InternalThreadLocalMap
 * io.netty.util.Timer
 * io.netty.util.TimerTask
 * io.netty.util.Timeout
 * io.netty.util.HashedWheelTimer

For the org.apache.dubbo.common.utils.CIDRUtils :

This product contains a modified portion of 'edazdarevic.commons.net.CIDRUtils' published at
https://github.com/edazdarevic/CIDRUtils. The project is licensed under a MIT License:
    * The MIT License
    *
    * Copyright (c) 2013 Edin Dazdarevic (edin.dazdarevic@gmail.com)
    * Permission is hereby granted, free of charge, to any person obtaining a copy
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    * THE SOFTWARE.

For the file org.apache.dubbo.common.utils.Utf8Utils.java:

This product contains a portion of the Protocol Buffers project, which is published at
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    Copyright 2008 Google Inc.  All rights reserved.

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