dubbo-remoting/dubbo-remoting-netty/src/main/java/org/apache/dubbo/remoting/transport/netty/NettyChannel.java [131:155]:
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    public void close() {
        try {
            super.close();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            removeChannelIfDisconnected(channel);
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            attributes.clear();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            if (logger.isInfoEnabled()) {
                logger.info("Close netty channel " + channel);
            }
            channel.close();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
    }
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dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyChannel.java [254:278]:
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    public void close() {
        try {
            super.close();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            removeChannelIfDisconnected(channel);
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            attributes.clear();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
        try {
            if (logger.isInfoEnabled()) {
                logger.info("Close netty channel " + channel);
            }
            channel.close();
        } catch (Exception e) {
            logger.warn(TRANSPORT_FAILED_CLOSE, "", "", e.getMessage(), e);
        }
    }
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