Github user ykrips commented on a diff in the pull request:
https://github.com/apache/tajo/pull/412#discussion_r26302284
--- Diff: tajo-rpc/src/main/java/org/apache/tajo/rpc/AsyncRpcClient.java ---
@@ -113,16 +87,11 @@ public void close() {
}
private class ProxyRpcChannel implements RpcChannel {
- private final ClientChannelInboundHandler handler;
-
- public ProxyRpcChannel() {
- this.handler = getChannel().pipeline()
- .get(ClientChannelInboundHandler.class);
+ private ClientChannelInboundHandler handler;
- if (handler == null) {
- throw new IllegalArgumentException("Channel does not have " +
- "proper handler");
- }
+ private ClientChannelInboundHandler handler() {
+ return handler == null ? handler = getChannel().pipeline()
--- End diff --
getChannel() function has a possibility to return null when channelfuture
is null, so it needs check null value.
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