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https://issues.apache.org/jira/browse/FLINK-930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14033500#comment-14033500
 ] 

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_r13845310
  
    --- Diff: 
stratosphere-runtime/src/main/java/eu/stratosphere/runtime/io/network/netty/NettyConnectionManager.java
 ---
    @@ -108,9 +130,9 @@ public void initChannel(SocketChannel channel) throws 
Exception {
                                .option(ChannelOption.SO_KEEPALIVE, true);
     
                try {
    -                   this.in.bind().sync();
    +                   in.bind().sync();
                } catch (InterruptedException e) {
    -                   throw new RuntimeException("Could not bind server 
socket for incoming connections.");
    +                   throw new IOException("Interrupted while trying to bind 
server socket.");
    --- End diff --
    
    I would also forward the exception here


> 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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