After restarting a failed job using RunIdIncrementer, all subsequent job launches throw ClassCastException

[cppwfs]

When using the RunIdIncrementer as an incrementer for a batch job, a user is unable to launch the batch job again with a new runId after restarting a previous job instance.
The RunIdIncrementer throws a ClassCastException.

Minimal Complete Reproducible example
Using this Project https://github.com/cppwfs/runiddemo

1. java -jar target/batchdemo-0.0.1-SNAPSHOT.jar
2. java -jar target/batchdemo-0.0.1-SNAPSHOT.jar run.id=1
3. java -jar target/batchdemo-0.0.1-SNAPSHOT.jar
   Step 3 will exhibit the error.

[fmbenhassine]

Thank you for opening this issue and for providing a minimal complete example.

If the RunIdIncrementer was documented by stating that it expects the run.id parameter to be of type Long , I would consider step 2 as an incorrect usage (which should be java -jar target/batchdemo-0.0.1-SNAPSHOT.jar run.id(long)=1). But this is not the case, the RunIdIncrementer does not specify the expected type of the parameter, so I consider this as a bug (Spring Batch shouldn't crash with a ClassCastException).