Ingest client close() hangs if there is no internet connection

[aronsemle]

If you create a SnowflakeStreamingIngestClient and then a channel and start sending data, then "pull the chord" or kill your internet and then try and clean up, the SnowflakeStreamingIngestClient.close() call hangs.

       // Close all channels
        if (this.outputChannels != null) {
            for (var channel : this.outputChannels.entrySet()) {
                try {
                    channel.getValue().close();
                } catch (Exception ignored) {
                }
            }
            this.outputChannels.clear();
        }

        // Close the client
        if (this.streamClient != null) {
            try {
                if (!this.streamClient.isClosed()) {
                    // This appears to hang indefinitely. As soon as I recover internet it works
                    this.streamClient.close();
             |
            } catch (Exception ignored) {
            }

            this.streamClient = null;
        }

[aronsemle]

For a little more background, we're on a local network pushing to Snowflake. In the case of an error (cable pull or other) we generally disconnect and tear down all resources and reconnect to start a "fresh" connection.

[aronsemle]

I think the bug is in SnowflakeStreamingIngestClientInternal.close(). It calls this.flush(true).get() which appears to never return? It seems like this should be this.flush(true).get(10, TimeUnit.SECONDS); or something with a reasonable wait time?