When I use the jenkins subversion to checkout codes, I offen get the following errors, and I checked the network is well, any idear for fix this probelm?

ERROR: Failed to check out http://localhost/svn/hit71/branches/PR_hit7100_1.00
org.tmatesoft.svn.core.SVNException: svn: REPORT /svn/hit71/!svn/vcc/default failed
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:291)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:276)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:264)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.doReport(DAVConnection.java:266)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.runReport(DAVRepository.java:1263)
at org.tmatesoft.svn.core.internal.io.dav.DAVRepository.update(DAVRepository.java:820)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.update(SVNUpdateClient.java:564)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.doCheckout(SVNUpdateClient.java:922)
at hudson.scm.subversion.CheckoutUpdater$1.perform(CheckoutUpdater.java:84)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:136)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:144)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.perform(UpdateUpdater.java:120)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:136)
at hudson.scm.SubversionSCM$CheckOutTask.perform(SubversionSCM.java:787)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:768)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:752)
at hudson.FilePath.act(FilePath.java:783)
at hudson.FilePath.act(FilePath.java:765)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:742)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:684)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1195)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:568)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:457)
at hudson.model.Run.run(Run.java:1404)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)
Caused by: org.tmatesoft.svn.core.SVNErrorMessage: svn: REPORT /svn/hit71/!svn/vcc/default failed
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:200)
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:146)
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:89)
... 27 more
Caused by: org.tmatesoft.svn.core.SVNException: svn: REPORT request failed on '/svn/hit71/!svn/vcc/default'
svn: Processing REPORT request response failed: XML document structures must start and end within the same entity. (/svn/hit71/!svn/vcc/default)
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.io.dav.http.HTTPConnection._request(HTTPConnection.java:644)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:285)
... 26 more
Caused by: org.tmatesoft.svn.core.SVNErrorMessage: svn: REPORT request failed on '/svn/hit71/!svn/vcc/default'
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:200)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection._request(HTTPConnection.java:642)
... 27 more
Caused by: org.tmatesoft.svn.core.SVNErrorMessage: svn: Processing REPORT request response failed: XML document structures must start and end within the same entity. (/svn/hit71/!svn/vcc/default)
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:200)
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:181)
at org.tmatesoft.svn.core.SVNErrorMessage.create(SVNErrorMessage.java:133)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:767)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.readData(HTTPConnection.java:719)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPRequest.dispatch(HTTPRequest.java:216)
at org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection._request(HTTPConnection.java:364)
... 27 more
FATAL: null
java.lang.NullPointerException
at java.util.ArrayList.addAll(ArrayList.java:497)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:742)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:684)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1195)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:568)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:457)
at hudson.model.Run.run(Run.java:1404)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:238)