Build failed in Hudson: ftpserver-trunk-jdk1.5-ubuntu #81

[Apache Hudson Server]

See <https://hudson.apache.org/hudson/job/ftpserver-trunk-jdk1.5-ubuntu/81/>

------------------------------------------
Started by an SCM change
Building remotely on ubuntu1
Updating https://svn.apache.org/repos/asf/mina/ftpserver/trunk
U         distribution/src/main/assemblies/src.xml
U         distribution/src/main/assemblies/bin.xml
U         core/src/main/java/org/apache/ftpserver/ConnectionConfigFactory.java
At revision 992894
hudson.util.IOException2: revision check failed on 
https://svn.apache.org/repos/asf/mina/ftpserver/trunk
        at 
hudson.scm.SubversionChangeLogBuilder.buildModule(SubversionChangeLogBuilder.java:157)
        at 
hudson.scm.SubversionChangeLogBuilder.run(SubversionChangeLogBuilder.java:99)
        at hudson.scm.SubversionSCM.calcChangeLog(SubversionSCM.java:504)
        at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:621)
        at hudson.model.AbstractProject.checkout(AbstractProject.java:1061)
        at 
hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
        at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
        at hudson.model.Run.run(Run.java:1272)
        at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:291)
        at hudson.model.ResourceController.execute(ResourceController.java:88)
        at hudson.model.Executor.run(Executor.java:129)
Caused by: org.tmatesoft.svn.core.SVNException: svn: unknown host
svn: OPTIONS request failed on '/repos/asf/mina/ftpserver/trunk'
        at 
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:103)
        at 
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:87)
        at 
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:616)
        at 
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:273)
        at 
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:261)
        at 
org.tmatesoft.svn.core.internal.io.dav.DAVConnection.exchangeCapabilities(DAVConnection.java:516)
        at 
org.tmatesoft.svn.core.internal.io.dav.DAVConnection.open(DAVConnection.java:98)
        at 
org.tmatesoft.svn.core.internal.io.dav.DAVRepository.openConnection(DAVRepository.java:1001)
        at 
org.tmatesoft.svn.core.internal.io.dav.DAVRepository.getLatestRevision(DAVRepository.java:178)
        at 
org.tmatesoft.svn.core.wc.SVNBasicClient.getRevisionNumber(SVNBasicClient.java:482)
        at 
org.tmatesoft.svn.core.wc.SVNBasicClient.getLocations(SVNBasicClient.java:851)
        at 
org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:534)
        at org.tmatesoft.svn.core.wc.SVNLogClient.doLog(SVNLogClient.java:1016)
        at org.tmatesoft.svn.core.wc.SVNLogClient.doLog(SVNLogClient.java:891)
        at org.tmatesoft.svn.core.wc.SVNLogClient.doLog(SVNLogClient.java:823)
        at 
hudson.scm.SubversionChangeLogBuilder.buildModule(SubversionChangeLogBuilder.java:145)
        ... 10 more
Caused by: java.net.UnknownHostException: svn.apache.org
        at java.net.InetAddress.getAllByName0(InetAddress.java:1158)
        at java.net.InetAddress.getAllByName(InetAddress.java:1084)
        at java.net.InetAddress.getAllByName(InetAddress.java:1020)
        at java.net.InetAddress.getByName(InetAddress.java:970)
        at 
org.tmatesoft.svn.core.internal.util.SVNSocketFactory.createAddres(SVNSocketFactory.java:132)
        at 
org.tmatesoft.svn.core.internal.util.SVNSocketFactory.createSSLSocket(SVNSocketFactory.java:67)
        at 
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.connect(HTTPConnection.java:183)
        at 
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:323)
        ... 23 more