Dispose method for KafkaStream object throws 'System.ObjectDisposedException: handle is destroyed'

Description

Hello, I have created simple console application to test GlobalTable + InMemory state store and everything works fine untill we close application. As recommended I do a call to KafkaStream.Dispose() and it throws an error :

Can you please help me with that ? What could be the cause of this issue ?

How to reproduce

Create .net 5.0 console application with Streamiz.Kafka.Net v1.1.5 I removed reading from state store because it doesn’t affect this issue, the minimal code to reproduce it below.

Configure and start:

            var config = new StreamConfig<StringSerDes, StringSerDes>();
            config.ApplicationId = "test-app-123";
            config.BootstrapServers = "localhost:9092";
            config.AutoOffsetReset = AutoOffsetReset.Earliest;

            StreamBuilder builder = new StreamBuilder();
            builder.GlobalTable("dima-test", InMemory<string, string>.As("dima-test-store"));

            Topology t = builder.Build();
            KafkaStream stream = new KafkaStream(t, config);
            await stream.StartAsync();

            await Task.Delay(2000);

            stream.Dispose();

Checklist

Please provide the following information:

• A complete (i.e. we can run it), minimal program demonstrating the problem. No need to supply a project file.
• A code snippet with your topology builder (ex: builder.Stream<string, string>(“topic”).to(“an-another-topic”)😉
• Streamiz.Kafka.Net nuget version. - v1.1.5
• Apache Kafka version. - v1.6.2 (which is referenced from Streamiz library)
• Client configuration.
• Operating system. - Windows 10
• Provide logs (with in debug mode (log4net and StreamConfig.Debug) as necessary in configuration).
• Critical issue. - no

[LGouellec]

1.2.0 released

[LGouellec]

Description

Hello, I have created simple console application to test GlobalTable + InMemory state store and everything works fine untill we close application. As recommended I do a call to KafkaStream.Dispose() and it throws an error :

Can you please help me with that ? What could be the cause of this issue ?

How to reproduce

Create .net 5.0 console application with Streamiz.Kafka.Net v1.1.5 I removed reading from state store because it doesn’t affect this issue, the minimal code to reproduce it below.

Configure and start:

            var config = new StreamConfig<StringSerDes, StringSerDes>();
            config.ApplicationId = "test-app-123";
            config.BootstrapServers = "localhost:9092";
            config.AutoOffsetReset = AutoOffsetReset.Earliest;

            StreamBuilder builder = new StreamBuilder();
            builder.GlobalTable("dima-test", InMemory<string, string>.As("dima-test-store"));

            Topology t = builder.Build();
            KafkaStream stream = new KafkaStream(t, config);
            await stream.StartAsync();

            await Task.Delay(2000);

            stream.Dispose();

Checklist

Please provide the following information:

• A complete (i.e. we can run it), minimal program demonstrating the problem. No need to supply a project file.
• A code snippet with your topology builder (ex: builder.Stream<string, string>(“topic”).to(“an-another-topic”)😉
• Streamiz.Kafka.Net nuget version. - v1.1.5
• Apache Kafka version. - v1.6.2 (which is referenced from Streamiz library)
• Client configuration.
• Operating system. - Windows 10
• Provide logs (with in debug mode (log4net and StreamConfig.Debug) as necessary in configuration).
• Critical issue. - no

I reproduced your fix, and in fact, sometimes an error is logged with ObjectDisposedException raised. It’s not a fatal error because it’s catch.

But I fixed this issue in my branch fix/84, will release in next release 1.2.0 in some weeks I hope.