Can't get hostname on WSL2+docker host network

Hi, this is a rather obscure bug 🙂

When running Quartz using the SimpleInstanceIdGenerator on WSL2 + docker + host network, it fails to get the current hostname and crashes when initializing the scheduler factory.

I’ve created a repro in https://github.com/mausch/QuartzNetHostAddressTest

The exception is “Cannot run without an instance id.” thrown at https://github.com/quartznet/quartznet/blob/a22915a9abac1568accb93eb24b4cce5331c8249/src/Quartz/Impl/StdSchedulerFactory.cs#L930 .

BTW it seems that throw should carry the inner exception i.e. make it:

throw new InvalidOperationException("Cannot run without an instance id.", e);

The way I propose to fix this is to simplify https://github.com/quartznet/quartznet/blob/2fccbc1a17c3fc1bd6f7433f8aedc2c541a1fa46/src/Quartz/Simpl/HostNameBasedIdGenerator.cs#L61-L62

Not sure why it’s doing all that DNS resolution just to get the hostname? Couldn’t that be just a call to Dns.GetHostName() ? I looked through the history of that file but couldn’t figure out why, maybe someone else knows!

Many thanks, Mauricio

[lahma]

3.3.2 should be available on NuGet now, thanks for the report and past contributions!

[lahma]

I’m hoping to get 3.3.2 out this evening so I went ahead 😉