Recently (these few days), I'v got the following error and can't go on building.
This error happens all the time on master job. However, it just occurs on
feature branch jobs occationally, but not always.

I've tried to checkout on the same box, directly from command line, and it goes
just fine (svn 1.7.18).

Checking out https://192.168.3.15/svn/www/Web/V2/trunk at revision '2015-01-16T17:32:11.806 +0800'
ERROR: Failed to check out https://192.168.3.15/svn/www/Web/V2/trunk
org.tmatesoft.svn.core.SVNException: svn: E155021: This client is too old to work with the working copy at
'/var/lib/jenkins/jobs/www/workspace' (format '100').
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:64)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:51)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDbRoot.<init>(SVNWCDbRoot.java:104)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDb.init(SVNWCDb.java:242)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.initWC(SVNWCContext.java:4979)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.initializeWC(SVNWCContext.java:4928)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgAbstractUpdate.checkout(SvnNgAbstractUpdate.java:796)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgCheckout.run(SvnNgCheckout.java:26)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgCheckout.run(SvnNgCheckout.java:11)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgOperationRunner.run(SvnNgOperationRunner.java:20)
at org.tmatesoft.svn.core.internal.wc2.SvnOperationRunner.run(SvnOperationRunner.java:21)
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.run(SvnOperationFactory.java:1259)
at org.tmatesoft.svn.core.wc2.SvnOperation.run(SvnOperation.java:294)
at hudson.scm.subversion.CheckoutUpdater$1.perform(CheckoutUpdater.java:115)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:162)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:170)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.perform(UpdateUpdater.java:133)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:162)
at hudson.scm.SubversionSCM$CheckOutTask.perform(SubversionSCM.java:991)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:972)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:948)
at hudson.FilePath.act(FilePath.java:981)
at hudson.FilePath.act(FilePath.java:959)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:897)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:833)
at hudson.scm.SCM.checkout(SCM.java:484)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1265)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:622)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:528)
at hudson.model.Run.execute(Run.java:1759)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:89)
at hudson.model.Executor.run(Executor.java:240)
java.io.IOException: Failed to check out https://192.168.3.15/svn/www/Web/V2/trunk
at hudson.scm.subversion.CheckoutUpdater$1.perform(CheckoutUpdater.java:126)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:162)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:170)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.perform(UpdateUpdater.java:133)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:162)
at hudson.scm.SubversionSCM$CheckOutTask.perform(SubversionSCM.java:991)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:972)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:948)
at hudson.FilePath.act(FilePath.java:981)
at hudson.FilePath.act(FilePath.java:959)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:897)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:833)
at hudson.scm.SCM.checkout(SCM.java:484)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1265)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:622)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:528)
at hudson.model.Run.execute(Run.java:1759)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:89)
at hudson.model.Executor.run(Executor.java:240)
Caused by: org.tmatesoft.svn.core.SVNException: svn: E155021: This client is too old to work with the working copy at
'/var/lib/jenkins/jobs/www/workspace' (format '100').
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:64)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:51)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDbRoot.<init>(SVNWCDbRoot.java:104)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDb.init(SVNWCDb.java:242)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.initWC(SVNWCContext.java:4979)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.initializeWC(SVNWCContext.java:4928)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgAbstractUpdate.checkout(SvnNgAbstractUpdate.java:796)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgCheckout.run(SvnNgCheckout.java:26)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgCheckout.run(SvnNgCheckout.java:11)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgOperationRunner.run(SvnNgOperationRunner.java:20)
at org.tmatesoft.svn.core.internal.wc2.SvnOperationRunner.run(SvnOperationRunner.java:21)
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.run(SvnOperationFactory.java:1259)
at org.tmatesoft.svn.core.wc2.SvnOperation.run(SvnOperation.java:294)
at hudson.scm.subversion.CheckoutUpdater$1.perform(CheckoutUpdater.java:115)
... 20 more