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https://issues.apache.org/jira/browse/FLINK-930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033499#comment-14033499 ]
ASF GitHub Bot commented on FLINK-930:
--------------------------------------
Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/incubator-flink/pull/19#discussion_r13845277
--- Diff: stratosphere-runtime/src/main/java/eu/stratosphere/runtime/io/network/ChannelManager.java ---
@@ -99,8 +95,13 @@ public ChannelManager(ChannelLookupProtocol channelLookupService, InstanceConnec
this.discardBufferPool = new DiscardBufferPool();
}
- public void shutdown() {
- this.nettyConnectionManager.shutdown();
+ public void shutdown() {
+ try {
+ this.networkConnectionManager.shutdown();
+ } catch (IOException e) {
+ LOG.warn("NetworkConnectionManager did not shutdown properly.");
--- End diff --
I think we should log the exception as well here (I guess the error is unlikely and needs review by the user)
> Netty Initialization is sometimes very slow
> -------------------------------------------
>
> Key: FLINK-930
> URL:
https://issues.apache.org/jira/browse/FLINK-930> Project: Flink
> Issue Type: Bug
> Reporter: Stephan Ewen
> Assignee: Ufuk Celebi
> Labels: performance
>
> I often see the initialization of Netty taking 3 seconds and then failing with the message
> "WARN io.netty.util.internal.ThreadLocalRandom - Failed to generate a seed from SecureRandom within 3 seconds. Not enough entrophy?"
> This adds to every single run a 3 seconds delay, which is often more than the test time and causes our builds to run out of time.
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