Program: 29880
Project: 29880
Buggy source:
@Override public void execute(AdminCommandContext context){
  ActionReport report=context.getActionReport();
  ctx=context;
  logger=context.logger;
  String msg="String_Node_Str";
  boolean fsfailure=false;
  boolean configfailure=false;
  instance=servers.getServer(instanceName);
  if (instance == null) {
    msg=Strings.get("String_Node_Str",instanceName);
    logger.warning(msg);
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
    return;
  }
  instanceHost=instance.getAdminHost();
  if (instance.isRunning()) {
    msg=Strings.get("String_Node_Str",instanceName);
    logger.warning(msg);
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
    return;
  }
  noderef=instance.getNodeRef();
  if (!StringUtils.ok(noderef)) {
    msg=Strings.get("String_Node_Str",instanceName);
    fsfailure=true;
  }
 else {
    theNode=nodes.getNode(noderef);
    if (theNode == null) {
      msg=Strings.get("String_Node_Str",noderef);
      fsfailure=true;
    }
  }
  if (!fsfailure) {
    nodedir=theNode.getNodeDirAbsolute();
    deleteInstanceFilesystem(context);
    report=context.getActionReport();
    if (report.getActionExitCode() != ActionReport.ExitCode.SUCCESS) {
      fsfailure=true;
    }
    msg=report.getMessage();
  }
  CommandInvocation ci=cr.getCommandInvocation("String_Node_Str",report);
  ParameterMap map=new ParameterMap();
  map.add("String_Node_Str",instanceName);
  ci.parameters(map);
  ci.execute();
  if (report.getActionExitCode() != ActionReport.ExitCode.SUCCESS && report.getActionExitCode() != ActionReport.ExitCode.WARNING) {
    configfailure=true;
    if (fsfailure) {
      msg=msg + NL + report.getMessage();
    }
 else {
      msg=report.getMessage();
    }
  }
  if (configfailure && fsfailure) {
    msg=msg + NL + NL+ Strings.get("String_Node_Str",instanceName,instanceHost);
  }
 else   if (configfailure && !fsfailure) {
    msg=msg + NL + NL+ Strings.get("String_Node_Str",instanceName,instanceHost);
  }
 else   if (!configfailure && fsfailure) {
    report.setActionExitCode(ActionReport.ExitCode.WARNING);
  }
  if (configfailure) {
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
  }
}

Fixed version (ground truth):
@Override public void execute(AdminCommandContext ctx){
  ActionReport report=ctx.getActionReport();
  logger=ctx.logger;
  String msg="String_Node_Str";
  boolean fsfailure=false;
  boolean configfailure=false;
  instance=servers.getServer(instanceName);
  if (instance == null) {
    msg=Strings.get("String_Node_Str",instanceName);
    logger.warning(msg);
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
    return;
  }
  instanceHost=instance.getAdminHost();
  if (instance.isRunning()) {
    msg=Strings.get("String_Node_Str",instanceName);
    logger.warning(msg);
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
    return;
  }
  noderef=instance.getNodeRef();
  if (!StringUtils.ok(noderef)) {
    msg=Strings.get("String_Node_Str",instanceName);
    fsfailure=true;
  }
 else {
    theNode=nodes.getNode(noderef);
    if (theNode == null) {
      msg=Strings.get("String_Node_Str",noderef);
      fsfailure=true;
    }
  }
  if (!fsfailure) {
    nodedir=theNode.getNodeDirAbsolute();
    deleteInstanceFilesystem(ctx);
    report=ctx.getActionReport();
    if (report.getActionExitCode() != ActionReport.ExitCode.SUCCESS) {
      fsfailure=true;
    }
    msg=report.getMessage();
  }
  CommandInvocation ci=cr.getCommandInvocation("String_Node_Str",report);
  ParameterMap map=new ParameterMap();
  map.add("String_Node_Str",instanceName);
  ci.parameters(map);
  ci.execute();
  if (report.getActionExitCode() != ActionReport.ExitCode.SUCCESS && report.getActionExitCode() != ActionReport.ExitCode.WARNING) {
    configfailure=true;
    if (fsfailure) {
      msg=msg + NL + report.getMessage();
    }
 else {
      msg=report.getMessage();
    }
  }
  if (configfailure && fsfailure) {
    msg=msg + NL + NL+ Strings.get("String_Node_Str",instanceName,instanceHost);
  }
 else   if (configfailure && !fsfailure) {
    msg=msg + NL + NL+ Strings.get("String_Node_Str",instanceName,instanceHost);
  }
 else   if (!configfailure && fsfailure) {
    report.setActionExitCode(ActionReport.ExitCode.WARNING);
  }
  if (configfailure) {
    report.setActionExitCode(ActionReport.ExitCode.FAILURE);
    report.setMessage(msg);
  }
}