[jira] [Created] (FLINK-7258) IllegalArgumentException in Netty bootstrap with large memory state segment size

["Ufuk Celebi (JIRA)" <ji...@apache.org>]

Ufuk Celebi created FLINK-7258:
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             Summary: IllegalArgumentException in Netty bootstrap with large memory state segment size
                 Key: FLINK-7258
                 URL: https://issues.apache.org/jira/browse/FLINK-7258
             Project: Flink
          Issue Type: Bug
          Components: Network
    Affects Versions: 1.3.1
            Reporter: Ufuk Celebi
            Assignee: Ufuk Celebi


In NettyBootstrap we configure the low and high watermarks in the following order:
{code}
bootstrap.childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, config.getMemorySegmentSize() + 1);
bootstrap.childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, 2 * config.getMemorySegmentSize());
{code}

When the memory segment size is higher than the default high water mark, this throws an `IllegalArgumentException` when a client tries to connect. Hence, this unfortunately only fails during runtime when a intermediate result is requested.

A simple fix is to first configure the high water mark and only then configure the low watermark.




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