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https://issues.apache.org/jira/browse/FLINK-2722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14901812#comment-14901812
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ASF GitHub Bot commented on FLINK-2722:
---------------------------------------
Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/flink/pull/1159#discussion_r40048959
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/net/NetUtils.java ---
@@ -189,9 +191,17 @@ public static InetAddress
findConnectingAddress(InetSocketAddress targetAddress,
long currentSleepTime = MIN_SLEEP_TIME;
long elapsedTime = 0;
+ // before trying with different strategies: test with
getLocalHost():
+ InetAddress localhostName = InetAddress.getLocalHost();
+
+ if(tryToConnect(localhostName, targetAddress,
AddressDetectionState.ADDRESS.getTimeout(), false)) {
+ LOG.debug("Using immediately InetAddress.getLocalHost()
for the connecting address");
--- End diff --
it might be useful to log the value of `localhostName` -
`InetAddress.getLocalHost()` sometimes returns odd values.
> Use InetAddress.getLocalHost() first when detecting TaskManager IP address
> --------------------------------------------------------------------------
>
> Key: FLINK-2722
> URL: https://issues.apache.org/jira/browse/FLINK-2722
> Project: Flink
> Issue Type: Bug
> Components: Distributed Runtime, TaskManager
> Affects Versions: 0.9, 0.10
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Fix For: 0.9.2
>
>
> A user reported a connection issue with Netty being unable to connect to a
> TaskManager to subscribe to an intermediate result.
> The problem occurred when the TaskManager and JobManager were running on the
> same host (something that can easily happen on YARN).
> In that case, the TaskManager was reporting a host-local ip address to the
> JobManager when connecting.
> To avoid the issue in the future, the TaskManager first tries to use the
> hostname returned by InetAddress.getLocalHost(). In a properly set-up
> environment, this will return a connection which is accessible by all
> machines in a cluster.
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