Jenkins can't start up after git client plugin install

[Zk W]

Hi All

We tried starting up Jenkins but we get the following error:

org.jvnet.hudson.reactor.ReactorException: java.lang.NoClassDefFoundError: hudson/plugins/git/GitLockFailedException
	at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:246)
	at jenkins.InitReactorRunner.run(InitReactorRunner.java:43)
	at jenkins.model.Jenkins.executeReactor(Jenkins.java:904)
	at jenkins.model.Jenkins.<init>(Jenkins.java:804)
	at hudson.model.Hudson.<init>(Hudson.java:81)
	at hudson.model.Hudson.<init>(Hudson.java:77)
	at hudson.WebAppMain$2.run(WebAppMain.java:214)
Caused by: java.lang.NoClassDefFoundError: hudson/plugins/git/GitLockFailedException
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
	at java.lang.Class.getDeclaredMethods(Class.java:1791)
	at org.jvnet.hudson.annotation_indexer.Index$2$1.fetch(Index.java:101)
	at org.jvnet.hudson.annotation_indexer.Index$2$1.hasNext(Index.java:71)
	at org.jvnet.hudson.annotation_indexer.FilterIterator.fetch(FilterIterator.java:23)
	at org.jvnet.hudson.annotation_indexer.FilterIterator.hasNext(FilterIterator.java:42)
	at hudson.init.InitializerFinder.discoverTasks(InitializerFinder.java:70)
	at hudson.PluginManager$2$1$3.run(PluginManager.java:367)
	at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
	at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
	at jenkins.model.Jenkins$7.runTask(Jenkins.java:893)
	at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
	at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassNotFoundException: hudson.plugins.git.GitLockFailedException
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 17 more

How do we recover this ?

We don't want to lose all our previous settings in our config.xml and job configurations.

We've used this for a while now.

Any help is appreciated.

Thank you

[Mark Waite]

Have you identified what changed that caused failure?

Some of the things you might try include:

- Backup your installation in case your experiments cause damage

Clear a few plugin directories (so that they can be recreated)

- Move the git client plugin directory (plugins/git-client) to a different location

- Move the git plugin directory (plugins/git) to a different location

- Start Jenkins so that it will reconstruct those directories

If that doesn't help, then you might try:

Rollback to previous plugin versions

- Move the git client plugin directory (plugins/git-client) to a different location

- Rename plugins/git-client.bak to plugins/git-client.hpi (or jpi, whatever is in your directory)

- Move the git plugin directory (plugins/git) to a different location

- Rename plugins/git.bak to plugins/git.hpi (or jpi, whatever is in your directory)

- Start Jenkins so that it will reconstruct those directories

I'm sure there are other techniques, but those should be relatively harmless and may lead you to a solution.

Mark Waite

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