Github user tillrohrmann commented on a diff in the pull request: https://github.com/apache/flink/pull/1030#discussion_r37617867 --- Diff: flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/functions/sink/SocketClientSink.java --- @@ -73,13 +84,44 @@ public void intializeConnection() { * The incoming data */ @Override - public void invoke(IN value) { + public void invoke(IN value) throws Exception { byte[] msg = schema.serialize(value); try { dataOutputStream.write(msg); } catch (IOException e) { - throw new RuntimeException("Cannot send message " + value.toString() + - " to socket server at " + hostName + ":" + port, e); + retries = 0; + boolean success = false; + while ((retries < maxRetry || retryForever) && !success && isRunning){ + try { + + if (dataOutputStream != null) { + dataOutputStream.close(); + } + + if (client != null && !client.isClosed()) { + client.close(); + } + + if (!retryForever){ + retries++; + } + + client = new Socket(hostName, port); + dataOutputStream = new DataOutputStream(client.getOutputStream()); + dataOutputStream.write(msg); + success = true; + + }catch(Exception ee){ --- End diff -- Well, it actually depends on the exceptions for which we want to restart. If I'm not mistaken, then `new Socket()` and `dataOutputStream.write` only throw `IOExceptions`. Thus, we should change it.
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