Java VS Code Case API Troubleshooting

📑This list is NOT intended to be exhaustive.📑

CONTENTS

• Dependency Resolution Issue
• GIT Detached HEAD
• Log4j StaticLoggerBinder Loading Warnings
• Logger Appenders Not Found

COMMON ISSUES

Dependency Resolution Issue

• Symptom: In spite of correct dependency entry in pom.xml, the following error occurs in code.

  [Java] The import xxx cannot be resolved
  

  
• Suggestions
  • Restart VS Code.
  • Clean the workspace directory.

GIT Detached HEAD

• Symptom:
  When running GIT command:

  git status
  

  It returns:

  HEAD detached at b9aee7d
  nothing to commit, working tree clean
  

  When running GIT command:

  git merge
  

  It returns:

  fatal: No current branch.
  

  When running GIT command:

  git symbolic-ref HEAD
  

  It returns:

  fatal: ref HEAD is not a symbolic ref
  

  

• Analysis: per Stack Overflow article: HEAD is the symbolic name for the currently checked out commit. When HEAD is not detached (the “normal”1 situation: you have a branch checked out), HEAD actually points to a branch’s “ref” and the branch points to the commit. HEAD is thus “attached” to a branch. When HEAD is detached, it points directly to a commit—instead of indirectly pointing to one through a branch. You can think of a detached HEAD as being on an unnamed branch.

• Suggestions: Run the following commands per same Stack Overflow article.

  git branch temp
  git checkout temp
  git log --graph --decorate --pretty=oneline --abbrev-commit master origin/master temp
  git diff master temp
  git diff origin/master temp
  git branch -f master temp
  git checkout master
  git branch -d temp
  git push origin master
  

Log4j StaticLoggerBinder Loading Warnings

• Symptom: When running console debugger, the following warning appears.

  SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
  SLF4J: Defaulting to no-operation (NOP) logger implementation
  SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
  

  
• Suggestions: Add following dependency to pom.xml.

  <dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.25</version>
  </dependency>
  

Logger Appenders Not Found

• Symptom: When running console debugger (especially after resolving StaticLoggerBinder Loading issue, the following warning appears.

  log4j:WARN No appenders could be found for logger (adal4jPii.class com.microsoft.aad.adal4j.AuthenticationContext).
  log4j:WARN Please initialize the log4j system properly.
  log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
  

  
• Suggestions: Add following snippets to Program.java.

  import org.apache.log4j.BasicConfigurator;
  BasicConfigurator.configure();