Serializable and not serializable lambdas

[Pranas Baliuka]

I'd like to know bit more about how class loader works in JET.

Is it safe to assume what if all nodes started with code available in original process class path the serializable is optional for the lambdas used in JET jobs?

Thanks!

[Viliam Durina]

Jet jobs can use any of these classes:

- available on member's classpath (e.g. through adding a jar to the `lib` folder)

- uploaded using Hazelcast Code Deployment

- added through JobConfig.addClass/addJar

The advantage of the last option is that the code is restricted for that particular job and can be updated without restarting the cluster.

The code availability has nothing to do with serializability of lambdas, you need both: Your lambdas need to be serializable (especially the state they capture) and their code available.

Viliam

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Viliam Durina

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