Looks like the node went offline during the build. Check the slave log for the details.FATAL: /var/lib/jenkins/logs/slaves/null/slave.log (No such file or directory)
java.io.FileNotFoundException: /var/lib/jenkins/logs/slaves/null/slave.log (No such file or directory)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
at org.kohsuke.stapler.framework.io.LargeText$FileSession.<init>(LargeText.java:397)
at org.kohsuke.stapler.framework.io.LargeText$2.open(LargeText.java:120)
at org.kohsuke.stapler.framework.io.LargeText.writeLogTo(LargeText.java:210)
at hudson.console.AnnotatedLargeText.writeHtmlTo(AnnotatedLargeText.java:159)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:605)
at hudson.model.Run.execute(Run.java:1568)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:236)