Two (2) senior developers and one (1) senior tester left our team and I am left with two (2) Java legacy applications that are hard to maintain. Here is a list of things I hate about these old webapps (let's call them app A and B):

1. App A depends on 80% web services. If one web service for a product or warehouse goes down, work flow is impeded while prod support team checks with the core services team for repair

2. App B is a maven project with multiple modules dependent on libraries that are dependent on company's internal libraries. So if we want to upgrade to OpenJdk 9 and up, the project will definitely produce a lot of errors due to deprecated/unsupported codes

3. App A is dependent on Tibco and I have no experience on that

4. App B's continuous integration build tool is Jenkins and the jobs that build it has a shell script that wasn't updated during the tech upgrade enhancement. The previous developer who did the knowledge transfer to me didn't tell me about this (it should be considered a defect on her part but she already resigned)

5. App A when loaded in eclipse IDE is a pain to work with since it is only allowed to build a war file using ant. I have to lookup in quick search instead of calling shortcuts (call hierarchy) because the project wasn't compiled via eclipse.

6. It's impossible to debug app A because of #5

7. Both applications have high priority and complex enhancements and I have no other teammates to help me

8. You never know what else can go wrong anytime