meszibalu commented on a change in pull request #4125:
URL: https://github.com/apache/hbase/pull/4125#discussion_r835140899
##########
File path:
hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/NettyRpcConnection.java
##########
@@ -321,31 +320,39 @@ public void run(boolean cancelled) throws IOException {
} else {
Channel channel = channelRef.get();
if (channel == null) {
- try {
- Channel newChannel = connect();
- if (!channelRef.compareAndSet(null, newChannel)) {
- newChannel.close();
+ connect().addListener(new ChannelFutureListener() {
+ @Override public void operationComplete(ChannelFuture
channelFuture) {
+ Channel ch = channelFuture.channel();
Review comment:
Ok, let me rephrase this: won't `channelFuture.channel()` throw an
exception? You call it, but you don't use the returned channel when the future
is not successful.
##########
File path:
hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/NettyRpcConnection.java
##########
@@ -321,31 +320,39 @@ public void run(boolean cancelled) throws IOException {
} else {
Channel channel = channelRef.get();
if (channel == null) {
- try {
- Channel newChannel = connect();
- if (!channelRef.compareAndSet(null, newChannel)) {
- newChannel.close();
+ connect().addListener(new ChannelFutureListener() {
+ @Override public void operationComplete(ChannelFuture
channelFuture) {
+ Channel ch = channelFuture.channel();
+ if (channelFuture.isSuccess()) {
+ if (!channelRef.compareAndSet(null, ch)) {
+ ch.close();
+ ch = channelRef.get();
+ }
+ writeAndFlushToChannel(call, ch);
Review comment:
If there is a concurrent shutdown, `ch = channelRef.get()` might return
`null`, so you call `writeAndFlushToChannel` with `null` channel. That should
be avoided.
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