Periodically, we run into the following message on our Windows Vista (32-bit)
slave VM. Note that this happens ONLY on the Windows slave, and that nothing
else has changed in our infrastructure or job definitions except the Hudson version.

...
Updating http://svn.apache.org/repos/asf/maven/components/branches/maven-2.1.x
ERROR: Failed to update
http://svn.apache.org/repos/asf/maven/components/branches/maven-2.1.x
org.tmatesoft.svn.core.SVNException: svn: No buffer space available (maximum
connections reached?): connect
svn: OPTIONS request failed on '/repos/asf/maven/components/branches/maven-2.1.x'
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:601)
at
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:257)
at
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:245)
at
org.tmatesoft.svn.core.internal.io.dav.DAVConnection.exchangeCapabilities(DAVConnection.java:454)
at org.tmatesoft.svn.core.internal.io.dav.DAVConnection.open(DAVConnection.java:97)
at
org.tmatesoft.svn.core.internal.io.dav.DAVRepository.openConnection(DAVRepository.java:665)
at
org.tmatesoft.svn.core.internal.io.dav.DAVRepository.getRepositoryUUID(DAVRepository.java:143)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:339)
at
org.tmatesoft.svn.core.wc.SVNBasicClient.createRepository(SVNBasicClient.java:327)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.update(SVNUpdateClient.java:426)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.doUpdate(SVNUpdateClient.java:394)
at org.tmatesoft.svn.core.wc.SVNUpdateClient.doUpdate(SVNUpdateClient.java:210)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:505)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:476)
at hudson.FilePath$FileCallableWrapper.call(FilePath.java:1517)
at hudson.remoting.UserRequest.perform(UserRequest.java:92)
at hudson.remoting.UserRequest.perform(UserRequest.java:46)
at hudson.remoting.Request$2.run(Request.java:236)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.SocketException: No buffer space available (maximum
connections reached?): connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at
org.tmatesoft.svn.core.internal.util.SVNSocketFactory.createPlainSocket(SVNSocketFactory.java:53)
at
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.connect(HTTPConnection.java:167)
at
org.tmatesoft.svn.core.internal.io.dav.http.HTTPConnection.request(HTTPConnection.java:307)
... 23 more

At the same time, if I look at the log for that node, I see:

[04/02/09 14:57:44] Launching slave agent
$ ssh vista2.grid.sonatype.com cmd /C C:/opt/hudson/slave/start.bat
At revision 158.
���channel started
Starting periodic ping thread
This is a Windows slave
Copied maven-agent.jar
Copied maven-interceptor.jar
Can't load log handler "java.util.logging.FileHandler"
java.io.IOException: Couldn't get lock for %u/.hudson/hudson%u.log
java.io.IOException: Couldn't get lock for %u/.hudson/hudson%u.log
at java.util.logging.FileHandler.openFiles(FileHandler.java:372)
at java.util.logging.FileHandler.<init>(FileHandler.java:208)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at java.util.logging.LogManager$7.run(LogManager.java:911)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.logging.LogManager.initializeGlobalHandlers(LogManager.java:903)
at java.util.logging.LogManager.access$900(LogManager.java:129)
at java.util.logging.LogManager$RootLogger.getHandlers(LogManager.java:1010)
at java.util.logging.Logger.log(Logger.java:454)
at java.util.logging.Logger.doLog(Logger.java:480)
at java.util.logging.Logger.log(Logger.java:569)
at hudson.Proc$LocalProc.join(Proc.java:157)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:504)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:485)
at hudson.remoting.UserRequest.perform(UserRequest.java:92)
at hudson.remoting.UserRequest.perform(UserRequest.java:46)
at hudson.remoting.Request$2.run(Request.java:236)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Apr 2, 2009 10:00:34 PM hudson.Proc$LocalProc join
WARNING: Process leaked file descriptors. See
http://hudson.gotdns.com/wiki/display/JENKINS/Spawning+processes+from+build for
more information
java.lang.Exception
at hudson.Proc$LocalProc.join(Proc.java:156)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:504)
at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:485)
at hudson.remoting.UserRequest.perform(UserRequest.java:92)
at hudson.remoting.UserRequest.perform(UserRequest.java:46)
at hudson.remoting.Request$2.run(Request.java:236)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Apr 3, 2009 10:00:17 AM hudson.remoting.Channel$ReaderThread run
SEVERE: Failed to execute command
UserRequest:hudson.FilePath$FileCallableWrapper@4b495a
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:597)
at
java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(ThreadPoolExecutor.java:727)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:657)
at
java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:78)
at hudson.remoting.Request.execute(Request.java:231)
at hudson.remoting.Channel$ReaderThread.run(Channel.java:675)
Apr 3, 2009 10:00:17 AM hudson.remoting.Channel$ReaderThread run
SEVERE: This command is created here
Command UserRequest:hudson.FilePath$FileCallableWrapper@4b495a created at
at hudson.remoting.Command.<init>(Command.java:47)
at hudson.remoting.Request.<init>(Request.java:75)
at hudson.remoting.UserRequest.<init>(UserRequest.java:57)
at hudson.remoting.Channel.call(Channel.java:480)
at hudson.FilePath.act(FilePath.java:545)
at hudson.FilePath.mkdirs(FilePath.java:600)
at hudson.model.AbstractProject.checkout(AbstractProject.java:806)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:314)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:266)
at hudson.model.Run.run(Run.java:899)
at hudson.model.Build.run(Build.java:112)
at hudson.model.ResourceController.execute(ResourceController.java:93)
at hudson.model.Executor.run(Executor.java:119)