Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/3391#discussion_r103203014
--- Diff:
flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/WebRuntimeMonitor.java
---
@@ -414,19 +410,36 @@ protected void initChannel(SocketChannel ch) {
NioEventLoopGroup bossGroup = new NioEventLoopGroup(1);
NioEventLoopGroup workerGroup = new NioEventLoopGroup();
+
+ final String configuredAddress = cfg.getWebFrontendAddress();
+ final Iterator<Integer> configuredPortRange =
cfg.getWebFrontendPortRange();
+
this.bootstrap = new ServerBootstrap();
this.bootstrap
.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.childHandler(initializer);
- ChannelFuture ch;
- if (configuredAddress == null) {
- ch = this.bootstrap.bind(configuredPort);
- } else {
- ch = this.bootstrap.bind(configuredAddress,
configuredPort);
+
+ try {
+ this.serverChannel =
NetUtils.createServerFromPorts(configuredAddress, configuredPortRange, new
NetUtils.ServerFactory<Channel>() {
+ @Override
+ public Channel create(String address, int port)
throws Exception {
+ ChannelFuture ch;
+ if (address == null) {
+ ch = bootstrap.bind(port);
+ } else {
+ ch = bootstrap.bind(address,
port);
+ LOG.info("Web frontend
listening at configuredAddress " + address );
+ }
+
+ return ch.sync().channel();
+ }
+ });
+ } catch (Exception e) {
+ throw new BindException(e.getMessage());
--- End diff --
Only forwarding exception messages is not good. Please preserve the cause
of the failure.
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