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From "Greg Hogan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-2603) Flink hangs before starting execution
Date Tue, 01 Sep 2015 17:51:48 GMT
Greg Hogan created FLINK-2603:
---------------------------------

             Summary: Flink hangs before starting execution
                 Key: FLINK-2603
                 URL: https://issues.apache.org/jira/browse/FLINK-2603
             Project: Flink
          Issue Type: Bug
          Components: Distributed Runtime
    Affects Versions: master, 0.9.1
            Reporter: Greg Hogan


The following simple application created from Flink's Java quickstart will hang before execution
if the data size is to large. I have tested this on both 0.9.1 and master (7364ce18) and the
threshold occurs with
  $ ./bin/flink run /path/to/blocks/target/blocks-1.0-SNAPSHOT.jar 19
running in a few seconds while
  $ ./bin/flink run /path/to/blocks/target/blocks-1.0-SNAPSHOT.jar 20
seemingly hangs forever.

I first put this together two months ago so if it is a bug it is not a new bug.

{code}
package blocks;

import java.util.ArrayList;
import java.util.List;

import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.io.DiscardingOutputFormat;

public class Job {

    public static void main(String[] args) throws Exception {
        // set up the execution environment
        final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();

        List<Long> data = new ArrayList<>();

        int count = 1 << Integer.valueOf(args[0]);
        
        for (int i = 0 ; i < count ; i++) {
            data.add(0L);
        }

        env.fromCollection(data).output(new DiscardingOutputFormat());

        System.out.println("Ready to execute ...");
        
        // execute program
        env.execute("Flink Java API Skeleton");
    }
}
{code}



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