```java
for (ExchangeClient client : clients) {
try {
client.close(ConfigUtils.getServerShutdownTimeout());
} catch (Throwable t) {
logger.warn(t.getMessage(), t);
}
}
```
I have double checked that `client.close();` will not actually close the client
and any resources. Because the Client is a ReferenceCountExchangeClient and it
will only close when there's no Invoker other than this one is using it, while
`rerefer` must happens before `destroyUnusedInvokers`, so there will at least
two invokers refering the client instance when close method is called.
```java
@Override
public void close(int timeout) {
if (refenceCount.decrementAndGet() <= 0) {
if (timeout == 0) {
client.close();
} else {
client.close(timeout);
}
client = replaceWithLazyClient();
}
}
```
[ Full content available at:
https://github.com/apache/incubator-dubbo/pull/2679 ]
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