I've started recently seeing the following error in my logs:

Mar 24, 2015 5:34:00 PM hudson.triggers.SCMTrigger$Runner runPolling
SEVERE: Failed to record SCM polling for hudson.model.FreeStyleProject@7bc9a7da[showtime-master]
java.lang.NoSuchMethodError: org.apache.http.impl.conn.CPool.setValidateAfterInactivity(I)V
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:176)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.<init>(PoolingHttpClientConnectionManager.java:158)
at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:919)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.checkCredentials(CliGitAPIImpl.java:2299)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1176)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1143)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1134)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.getHeadRev(CliGitAPIImpl.java:2074)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWithImpl(GitSCM.java:565)
at hudson.plugins.git.GitSCM.compareRemoteRevisionWith(GitSCM.java:515)
at hudson.scm.SCM.compareRemoteRevisionWith(SCM.java:380)
at hudson.scm.SCM.poll(SCM.java:397)
at hudson.model.AbstractProject._poll(AbstractProject.java:1446)
at hudson.model.AbstractProject.poll(AbstractProject.java:1349)
at hudson.triggers.SCMTrigger$Runner.runPolling(SCMTrigger.java:515)
at hudson.triggers.SCMTrigger$Runner.run(SCMTrigger.java:544)
at hudson.util.SequentialExecutionQueue$QueueEntry.run(SequentialExecutionQueue.java:118)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

I've tried googling for something similar but no luck.

Any ideas?