After upgrading our svn server to version 1.8 we have started to receive build failures. This happens to be occurred in every build project we defined. Note that we are using Jenkins CI v.1.602(installed on Windows 8 x64 OS) and Subversion Plugin v.2.5 for Jenkins. The stack trace from the log is as follows: (full svn url is omitted for security reasons)

ERROR: Failed to check out http://svn.xxx.com.tr/xxxx/trunk/xxx
org.tmatesoft.svn.core.SVNException: svn: E175002: Processing REPORT request response failed: XML document structures must start and end within the same entity. (/ISPL/!svn/vcc/default)
svn: E175002: REPORT request failed on '/ISPL/!svn/vcc/default'
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:106)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:90)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:764)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:371)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:359)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.performHttpRequest(DAVConnection.java:710)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doReport(DAVConnection.java:334)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.runReport(DAVRepository.java:1303)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.update(DAVRepository.java:851)
at org.tmatesoft.svn.core.internal.wc16.SVNUpdateClient16.update(SVNUpdateClient16.java:507)
at org.tmatesoft.svn.core.internal.wc16.SVNUpdateClient16.doCheckout(SVNUpdateClient16.java:915)
at org.tmatesoft.svn.core.internal.wc2.old.SvnOldCheckout.run(SvnOldCheckout.java:66)
at org.tmatesoft.svn.core.internal.wc2.old.SvnOldCheckout.run(SvnOldCheckout.java:18)
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.SubversionSCM$CheckOutTask.perform(SubversionSCM.java:991)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:972)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:948)
at hudson.FilePath.act(FilePath.java:989)
at hudson.FilePath.act(FilePath.java:967)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:897)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:833)
at hudson.scm.SCM.checkout(SCM.java:484)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1270)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:609)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
at hudson.model.Run.execute(Run.java:1750)
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 http://svn.xxx.com.tr/xxxx/trunk/xxx
at hudson.scm.subversion.CheckoutUpdater$1.perform(CheckoutUpdater.java:126)
at hudson.scm.subversion.WorkspaceUpdater$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$CheckOutTask.invoke(SubversionSCM.java:948)
at hudson.FilePath.act(FilePath.java:989)
at hudson.FilePath.act(FilePath.java:967)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:897)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:833)
at hudson.scm.SCM.checkout(SCM.java:484)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1270)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:609)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
at hudson.model.Run.execute(Run.java:1750)
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: E175002: Processing REPORT request response failed: XML document structures must start and end within the same entity. (/ISPL/!svn/vcc/default)
svn: E175002: REPORT request failed on '/ISPL/!svn/vcc/default'
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:106)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:90)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:764)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:371)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:359)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.performHttpRequest(DAVConnection.java:710)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doReport(DAVConnection.java:334)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.runReport(DAVRepository.java:1303)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.update(DAVRepository.java:851)
at org.tmatesoft.svn.core.internal.wc16.SVNUpdateClient16.update(SVNUpdateClient16.java:507)
at org.tmatesoft.svn.core.internal.wc16.SVNUpdateClient16.doCheckout(SVNUpdateClient16.java:915)
at org.tmatesoft.svn.core.internal.wc2.old.SvnOldCheckout.run(SvnOldCheckout.java:66)
at org.tmatesoft.svn.core.internal.wc2.old.SvnOldCheckout.run(SvnOldCheckout.java:18)
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)
... 17 more