I have checked for this defect online but couldn't get a solution. The job doesn't terminate the job correctly. The Jenkins version is the latest one. Some more details are

Environment - Windows 7
Jenkins service is started with my user id and pasword.

The error that I get is ERROR: Build step failed with exception
org.jvnet.winp.WinpException: Failed to read environment variable table error=299 at .\envvar-cmdline.cpp:201
at org.jvnet.winp.Native.getCmdLineAndEnvVars(Native Method)
at org.jvnet.winp.WinProcess.parseCmdLineAndEnvVars(WinProcess.java:126)
at org.jvnet.winp.WinProcess.getCommandLine(WinProcess.java:102)
at org.jvnet.winp.WinProcess.killRecursively(WinProcess.java:66)
at hudson.util.ProcessTree$Windows$1.killRecursively(ProcessTree.java:425)
at hudson.util.ProcessTree.killAll(ProcessTree.java:141)
at hudson.Proc$LocalProc.destroy(Proc.java:379)
at hudson.Proc$LocalProc.join(Proc.java:352)
at hudson.Launcher$ProcStarter.join(Launcher.java:389)
at hudson.tasks.Ant.perform(Ant.java:217)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:779)
at hudson.model.Build$BuildExecution.build(Build.java:205)
at hudson.model.Build$BuildExecution.doRun(Build.java:162)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:537)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:408