nhibernate/NHibernate-Caches

Migrating from NHiberate 5.2.7 to 5.3.5 results in could not load assembly exception

Eckii24 opened this issue · 3 comments

Eckii24 commented

We try to migrate the following dependencies of our project:

  • NHibernate: 5.2.7 --> 5.3.5
  • Nhibernate.Caches.SysCache: 5.6.0 --> 5.7.0

This results in the exception below:

NHibernate.HibernateException : could not instantiate CacheProvider: NHibernate.Caches.SysCache.SysCacheProvider, NHibernate.Caches.SysCache
  ----> System.IO.FileLoadException : Could not load file or assembly 'NHibernate, Version=5.2.0.0, Culture=neutral, PublicKeyToken=aa95f207798dfdb4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
TearDown : System.NullReferenceException : Object reference not set to an instance of an object.
   at NHibernate.Cfg.SettingsFactory.CreateCacheProvider(IDictionary`2 properties)
   at NHibernate.Cfg.SettingsFactory.BuildSettings(IDictionary`2 properties)
   at NHibernate.Cfg.Configuration.BuildSettings()
   at NHibernate.Cfg.Configuration.BuildSessionFactory()

We have checked the output directory bin for the dependencies. The corresponding assemblies are included here.
It seems that NHibernate.Caches.SysCache does not recognize NHibernate version 5.3.5 as a version greater than 5.2.0.0.

Additional information:
Inside the hibernate-configuration we have specified the property cache.provider_class with the value NHibernate.Caches.SysCache.SysCacheProvider, NHibernate.Caches.SysCache.

How can we solve this issue?

Thanks in advance!

fredericDelaporte commented

Have you tried bindings redirects?

Eckii24 commented

Thanks for your reply!
As a workaround your advice works. The follow code results in a successful build:

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
      <assemblyIdentity name="NHibernate" culture="neutral" publicKeyToken="aa95f207798dfdb4" />
      <bindingRedirect newVersion="5.3.0.0" oldVersion="0.0.0.0-5.3.0.0" />
    </dependentAssembly>
  </assemblyBinding>
</runtime

One further question: When do you plan to support version 5.3 natively?

fredericDelaporte commented

We avoid forcing consumer to upgrade dependencies by upgrading it in the cache project, unless we need to use something not available with previous versions.

So usually, we upgrade the nhibernate dependency on major releases.