FATAL: null
java.lang.NullPointerException
at hudson.remoting.ProxyOutputStream._write(ProxyOutputStream.java:118)
at hudson.remoting.ProxyOutputStream.write(ProxyOutputStream.java:103)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
at java.io.FilterOutputStream.close(FilterOutputStream.java:140)
at java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.java:149)
at java.io.FilterOutputStream.close(FilterOutputStream.java:143)
at org.apache.tools.tar.TarBuffer.close(TarBuffer.java:450)
at hudson.org.apache.tools.tar.TarOutputStream.close(TarOutputStream.java:150)
at hudson.util.io.TarArchiver.close(TarArchiver.java:114)
at hudson.FilePath.writeToTar(FilePath.java:1545)
at hudson.FilePath.copyRecursiveTo(FilePath.java:1470)
at hudson.FilePath.copyRecursiveTo(FilePath.java:1399)
at hudson.plugins.copyartifact.FilePathCopyMethod.init(FilePathCopyMethod.java:56)
at hudson.plugins.copyartifact.CopyArtifact.perform(CopyArtifact.java:221)
at hudson.plugins.copyartifact.CopyArtifact.perform(CopyArtifact.java:199)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:601)
at hudson.model.Build$RunnerImpl.build(Build.java:174)
at hudson.model.Build$RunnerImpl.doRun(Build.java:138)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:416)
at hudson.model.Run.run(Run.java:1257)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:127)

I'm wondering what could make window null in line 118 for hudson.remoting.ProxyOutputStream?
103 _write(b, off, len);
104 }
105
106 /**
107 *

{@link #write(byte[])}

without the close check.
108 */
109 private synchronized void _write(byte[] b, int off, int len) throws IOException {
110 if(channel==null)

{ 111 if(tmp==null) 112 tmp = new ByteArrayOutputStream(); 113 tmp.write(b,off,len); 114 }

else {
115 while (len>0) {
116 int sendable;
117 try {
118 sendable = Math.min(window.get(),len);