Hi everyone,
We have Sharepoint Server 2019 farm with 6 servers with roles (app, wfe1, wfe2, wfe3, search1, search2) and some custom timer jobs. After patching farm, when we run PSConfig on Search servers (other servers don't have this problem) , custom timerjobs dissapeared from farm (Job Definitions page in CA). We have to reactivate the feature for the timerjobs to appear again.
In Upgrade logs we found messages type like "Cannot deserialize type Microsoft.Sharepoint.Administration.SPDocumentListInfoSampleJobDefinition, Microsoft.SharePoint, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" for each custom type than contains timerjobs.
Why is this happening? How can I avoid this?