In h2oai/h2o-3 version 3.46.0, the `run_tool` command in the `rapids` component allows the `main` function of any class under the `water.tools` namespace to be called. One such class, `MojoConvertTool`, crashes the server when invoked with an invalid argument, causing a denial of service.
https://huntr.com/bounties/d80a2139-fc03-44b7-b739-de41e323b458
https://github.com/h2oai/h2o-3/commit/d0899f8e0f7a584b60405a65b1d7b439aaaa55a5