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From se...@apache.org
Subject flink git commit: [runtime] Improve error message for failed network connections due to limited number of file handles
Date Wed, 20 May 2015 11:32:22 GMT
Repository: flink
Updated Branches:
  refs/heads/master 825cea2df -> 89209a46d


[runtime] Improve error message for failed network connections due to limited number of file
handles


Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/89209a46
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/89209a46
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/89209a46

Branch: refs/heads/master
Commit: 89209a46d8329ebdb8c3bde7cda4061143eb0212
Parents: 825cea2
Author: Stephan Ewen <sewen@apache.org>
Authored: Tue May 19 15:43:40 2015 +0200
Committer: Stephan Ewen <sewen@apache.org>
Committed: Wed May 20 13:31:16 2015 +0200

----------------------------------------------------------------------
 .../runtime/io/network/netty/NettyClient.java    | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/flink/blob/89209a46/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyClient.java
----------------------------------------------------------------------
diff --git a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyClient.java
b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyClient.java
index c24c743..201ec33 100644
--- a/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyClient.java
+++ b/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/netty/NettyClient.java
@@ -154,6 +154,23 @@ class NettyClient {
 	ChannelFuture connect(SocketAddress serverSocketAddress) {
 		checkState(bootstrap != null, "Client has not been initialized yet.");
 
-		return bootstrap.connect(serverSocketAddress);
+		try {
+			return bootstrap.connect(serverSocketAddress);
+		}
+		catch (io.netty.channel.ChannelException e) {
+			if ( (e.getCause() instanceof java.net.SocketException &&
+					e.getCause().getMessage().equals("Too many open files")) ||
+				(e.getCause() instanceof io.netty.channel.ChannelException &&
+						e.getCause().getCause() instanceof java.net.SocketException &&
+						e.getCause().getCause().getMessage().equals("Too many open files")))
+			{
+				throw new io.netty.channel.ChannelException(
+						"The operating system does not offer enough file handles to open the network connection.
" +
+								"Please increase the number of of available file handles.", e.getCause());
+			}
+			else {
+				throw e;
+			}
+		}
 	}
 }


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