Java error when using git-credential-manager in Mac on OSX?

I had the same issue after I inserted some wrong credentials requested by git while using IntelliJ. I solved it by changing the helper in ~/.gitconfig, (like @Migg said :). My gitconfig was pointed to the Java 8, and how I had already installed Java 8 and Java 11 installed in my machine (OSX 10.14). I just pointed to the newest version.

Before

[user]
    email = <email>
    name = <name>
[core]
    autocrlf = input
[credential]
    helper = !/Library/Java/JavaVirtualMachines/<java-1.8>/Contents/Home/jre/bin/java -Ddebug=false -Djava.net.useSystemProxies=true -jar /usr/local/Cellar/git-credential-manager/2.0.4/libexec/git-credential-manager-2.0.4.jar

After

credential]
        helper = !/Library/Java/JavaVirtualMachines/jdk-11.0.3.jdk/Contents/Home/jre/bin/java -Ddebug=false -Djava.net.useSystemProxies=true -jar /usr/local/Cellar/git-credential-manager/2.0.4/libexec/git-credential-manager-2.0.4.jar

Oct. 2017: That is tracked with Microsoft/Git-Credential-Manager-for-Mac-and-Linux issues/69

I dumped Java 9 and installed Java 8, and everything worked just fine.

brew cask remove java    

Reinstall git-credential-manager

git-credential-manager install

I stumbled on the same issue as @JoeyHerrington and installed JDK8 instead:

brew cask install caskroom/versions/java8

Update Sept. 2018: the same issue now includes:

version 2.0.4 of Git Credential Manager now supports Java 9+.
The update is available on GitHub and will be available on Homebrew soon.

So the OP (one year later) should not be an problem anymore.

---

Thomas Hagström adds in the comments:

I would say removing the folders is safest.

sudo rm -rf "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin" 
sudo rm -rf "/Library/PreferencePanes/JavaControlPanel.prefPane" 
sudo rm -rf "~/Library/Application Support/Oracle" 
sudo rm -rf "~/Library/Java"

Then reinstall git credential manager so it picks up the correct Java version / virtual machine.