bayertm I installed a fresh copy of windows 10 x64 and git 2.5.0 on a computer and was unable to duplicate what you reported.

My PATH settings did not include C:\Program Files\Git\mingw64\bin as far as I can tell. Was that a change you added intentionally? Did you get that by choosing to allow full access to all the git commands when you installed git for Windows 2.5.0? That is the option which includes the red text warning that it will change the behavior of find and sort. I didn't choose that option when I installed on my Windows 10 machine.

I installed a fresh copy of Windows 7 x86 and git 2.5.0 on a computer using different defaults than the Windows 10 machine. I wasn't able to duplicate the problem on the Windows 7 machine either.

Any hints what might other things might be different between your environment and the test environments I've configured?

I'm having the same issue of ssh not found.

• Win 7 Ultimate 64 bit
• git-win 2.5.3 64 bit
• Jenkins 1.633
• GIT client plugin 1.19.0
• GIT plugin 2.4.0
• PATH: C:\Perl64\site\bin;C:\Perl64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\doxygen\bin;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.0\;C:\Program Files\Git\cmd

Git is installed in C:\Program Files\Git
git.exe is in both in the bin and cmd subfolders.
ssh.exe is in the usr/bin subfolder.

In Jenkins / Configure System, a global env. variable GIT_SSH is defined as "C:\Program Files\Git\usr\bin\ssh.exe" (with quotes), but there is no such system-wide (i.e. Windows) environment variable.

The error message is

javax.servlet.ServletException: java.lang.RuntimeException: ssh executable not found. The git plugin only supports official git client http://git-scm.com/download/win
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:249)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:249)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:58)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:129)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:949)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1011)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: ssh executable not found. The git plugin only supports official git client http://git-scm.com/download/win
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getSSHExecutable(CliGitAPIImpl.java:1569)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.createWindowsGitSSH(CliGitAPIImpl.java:1575)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1305)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1282)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1273)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getHeadRev(CliGitAPIImpl.java:2404)
at hudson.plugins.git.UserRemoteConfig$DescriptorImpl.doCheckUrl(UserRemoteConfig.java:156)
at sun.reflect.GeneratedMethodAccessor533.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:121)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
... 69 more

PS: Using the workaround with a symlink suggested by wsaxon worked. Thanks!

Reopening since there are now two users who report the same failure.

I am also seeing this issue with the latest version of Git for window 2.7.0, on git-client version 1.19.0

> git --version # timeout=10
15:42:59 using GIT_SSH to set credentials
15:42:59 FATAL: ssh executable not found. The git plugin only supports official git client http://git-scm.com/download/win
15:42:59 java.lang.RuntimeException: ssh executable not found. The git plugin only supports official git client http://git-scm.com/download/win

I set /usr/bin/ssh.exe to %GIT_SSH% to workaround the issue.

I would love to have steps which will allow me to duplicate the scenario. Can you provide the installation location of your git for windows, your environment variables, and anything else that you think might make your case fail when I (and many other users) don't see the same failure?

Sorry markewaite, haven't had time to follow on this.
With a clean install of win_2012 server, I manually installed git into a non-default location.
It added the location of git to the path, set %GIT_HOME% and was seeing the issue.
I resolved the issue by setting %GIT_SSH%

I now have a machine which shows the problem.

Believed to be fixed in git client plugin 1.19.3, released 6 Feb 2016

Code changed in jenkins
User: Mark Waite
Path:
src/main/java/org/jenkinsci/plugins/gitclient/CliGitAPIImpl.java
src/test/java/org/jenkinsci/plugins/gitclient/CliGitAPIImplTest.java
src/test/java/org/jenkinsci/plugins/gitclient/GitAPITestCase.java
http://jenkins-ci.org/commit/git-client-plugin/2a2c6d339dcda8556b267f8a3584a5dd762be387
Log:
Add mingw64 dir to ssh location guesser - windows git 2.8.0

Implement ssh executable test in CliGitAPIImplTest, not applicable
to JGit.

May help JENKINS-30045, JENKINS-28943, JENKINS-25297, & JENKINS-21806