Program: 88536
Project: 88536
Buggy source:
public String commitAction(){
  String org=null;
  URIBuilder requestUri=MMSUtils.getServiceOrgsUri(project);
  if (requestUri == null) {
    Application.getInstance().getGUILog().log("String_Node_Str");
    return null;
  }
  try {
    org=MMSUtils.getMmsOrg(project);
  }
 catch (  IOException|URISyntaxException|ServerException e1) {
    Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
    e1.printStackTrace();
    return null;
  }
  ObjectNode response;
  if (org == null || org.isEmpty()) {
    try {
      response=JacksonUtils.parseJsonObject(MMSUtils.sendMMSRequest(project,MMSUtils.buildRequest(MMSUtils.HttpRequestType.GET,requestUri)));
    }
 catch (    IOException|URISyntaxException|ServerException e1) {
      Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
      e1.printStackTrace();
      return null;
    }
    ArrayList<String> mmsOrgsList=new ArrayList<>();
    if (response != null) {
      JsonNode arrayNode;
      if ((arrayNode=response.get("String_Node_Str")) != null && arrayNode.isArray()) {
        for (        JsonNode orgNode : arrayNode) {
          JsonNode value;
          if ((value=orgNode.get(MDKConstants.NAME_KEY)) != null && value.isTextual()) {
            mmsOrgsList.add(value.asText());
          }
        }
      }
    }
    String[] mmsOrgs=mmsOrgsList.toArray(new String[mmsOrgsList.size()]);
    if (mmsOrgs.length > 0) {
      JFrame selectionDialog=new JFrame();
      org=(String)JOptionPane.showInputDialog(selectionDialog,"String_Node_Str","String_Node_Str",JOptionPane.QUESTION_MESSAGE,null,mmsOrgs,mmsOrgs[0]);
    }
 else {
      Application.getInstance().getGUILog().log("String_Node_Str");
    }
    if ((org == null || org.isEmpty()) && MDUtils.isDeveloperMode()) {
      org=new CommitOrgAction(project).commitAction();
    }
  }
  if (org == null || org.isEmpty()) {
    Application.getInstance().getGUILog().log("String_Node_Str");
    return null;
  }
  requestUri.setPath(requestUri.getPath() + "String_Node_Str" + org+ "String_Node_Str");
  Collection<ObjectNode> projects=new LinkedList<>();
  projects.add(MMSUtils.getProjectObjectNode(project));
  try {
    File sendData=MMSUtils.createEntityFile(this.getClass(),ContentType.APPLICATION_JSON,projects,MMSUtils.JsonBlobType.PROJECT);
    response=JacksonUtils.parseJsonObject(MMSUtils.sendMMSRequest(project,MMSUtils.buildRequest(MMSUtils.HttpRequestType.POST,requestUri,sendData,ContentType.APPLICATION_JSON)));
  }
 catch (  IOException|URISyntaxException|ServerException e1) {
    Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
    e1.printStackTrace();
    return null;
  }
  if (shouldCommitModel) {
    RunnableWithProgress temp=new ManualSyncActionRunner<>(CommitClientElementAction.class,Collections.singletonList(project.getPrimaryModel()),project,-1);
    ProgressStatusRunner.runWithProgressStatus(temp,"String_Node_Str",true,0);
  }
  return Converters.getIProjectToIdConverter().apply(project.getPrimaryProject());
}

Fixed version (ground truth):
public String commitAction(){
  String org=null;
  URIBuilder requestUri=MMSUtils.getServiceOrgsUri(project);
  if (requestUri == null) {
    Application.getInstance().getGUILog().log("String_Node_Str");
    return null;
  }
  try {
    org=MMSUtils.getMmsOrg(project);
  }
 catch (  IOException|URISyntaxException|ServerException e1) {
    Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
    e1.printStackTrace();
    return null;
  }
  ObjectNode response;
  if (org == null || org.isEmpty()) {
    try {
      response=JacksonUtils.parseJsonObject(MMSUtils.sendMMSRequest(project,MMSUtils.buildRequest(MMSUtils.HttpRequestType.GET,requestUri)));
    }
 catch (    IOException|URISyntaxException|ServerException e1) {
      Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
      e1.printStackTrace();
      return null;
    }
    ArrayList<String> mmsOrgsList=new ArrayList<>();
    if (response != null) {
      JsonNode arrayNode;
      if ((arrayNode=response.get("String_Node_Str")) != null && arrayNode.isArray()) {
        for (        JsonNode orgNode : arrayNode) {
          JsonNode value;
          if ((value=orgNode.get(MDKConstants.NAME_KEY)) != null && value.isTextual()) {
            mmsOrgsList.add(value.asText());
          }
        }
      }
    }
    String[] mmsOrgs=mmsOrgsList.toArray(new String[mmsOrgsList.size()]);
    if (mmsOrgs.length > 0) {
      JFrame selectionDialog=new JFrame();
      org=(String)JOptionPane.showInputDialog(selectionDialog,"String_Node_Str","String_Node_Str",JOptionPane.QUESTION_MESSAGE,null,mmsOrgs,mmsOrgs[0]);
    }
 else {
      Application.getInstance().getGUILog().log("String_Node_Str");
    }
    if ((org == null || org.isEmpty()) && MDUtils.isDeveloperMode()) {
      org=new CommitOrgAction(project).commitAction();
    }
  }
  if (org == null || org.isEmpty()) {
    Application.getInstance().getGUILog().log("String_Node_Str");
    return null;
  }
  requestUri.setPath(requestUri.getPath() + "String_Node_Str" + org+ "String_Node_Str");
  Collection<ObjectNode> projects=new LinkedList<>();
  projects.add(MMSUtils.getProjectObjectNode(project));
  try {
    File sendData=MMSUtils.createEntityFile(this.getClass(),ContentType.APPLICATION_JSON,projects,MMSUtils.JsonBlobType.PROJECT);
    response=JacksonUtils.parseJsonObject(MMSUtils.sendMMSRequest(project,MMSUtils.buildRequest(MMSUtils.HttpRequestType.POST,requestUri,sendData,ContentType.APPLICATION_JSON)));
    if (response != null) {
      Thread.sleep(5000);
    }
  }
 catch (  IOException|URISyntaxException|ServerException|InterruptedException e1) {
    Application.getInstance().getGUILog().log("String_Node_Str" + e1.getMessage());
    e1.printStackTrace();
    return null;
  }
  if (shouldCommitModel) {
    RunnableWithProgress temp=new ManualSyncActionRunner<>(CommitClientElementAction.class,Collections.singletonList(project.getPrimaryModel()),project,-1);
    ProgressStatusRunner.runWithProgressStatus(temp,"String_Node_Str",true,0);
  }
  return Converters.getIProjectToIdConverter().apply(project.getPrimaryProject());
}