[GitHub] [dubbo] IndiraFinish opened issue #6089: NettyChannel的close方法是否有内存泄漏的风险

["IndiraFinish (GitHub)" <gi...@apache.org>]

```
public void close() {
        try {
            super.close();
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
        try {
            removeChannelIfDisconnected(channel);(1)
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
        try {
            attributes.clear();
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
        try {
            if (logger.isInfoEnabled()) {
                logger.info("Close netty channel " + channel);
            }
            channel.close();(2)
        } catch (Exception e) {
            logger.warn(e.getMessage(), e);
        }
    }
```

先移除channelMap的引用，会校验netty的通道是否激活，如果激活就没有办法移除。
这种情况下先调用（1）再调用（2）是否会有内存泄漏的风险

[ Full content available at: https://github.com/apache/dubbo/issues/6089 ]
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