Program: 167403
Project: 167403
Buggy source:
@Override public void handle(Message inputMessage,ISendMessageCallback callback,boolean unitOfWorkBoundaryReached){
  if (ComponentUtils.getPayloadType(inputMessage.getPayload()) == ComponentUtils.PAYLOAD_TYPE_LIST_STRING) {
    List<String> files=inputMessage.getPayload();
    ArrayList<String> filePaths=new ArrayList<String>();
    for (    String fileName : files) {
      log(LogLevel.INFO,"String_Node_Str",fileName);
      FileInfo sourceZipFile=sourceDir.listFile(fileName);
      if (mustExist && sourceZipFile == null) {
        throw new IoException(String.format("String_Node_Str",fileName));
      }
      if (sourceZipFile != null) {
        File unzipDir=new File(LogUtils.getLogDir(),"String_Node_Str");
        unzipDir.mkdirs();
        File localZipFile=copyZipLocally(fileName,unzipDir);
        ZipFile zipFile=getNewZipFile(localZipFile);
        InputStream in=null;
        OutputStream out=null;
        try {
          String targetDirNameResolved=resolveParamsAndHeaders(targetRelativePath,inputMessage);
          if (targetSubDir) {
            targetDirNameResolved=targetDirNameResolved + "String_Node_Str" + FilenameUtils.removeExtension(new FileInfo(fileName,false,0).getName());
          }
          for (Enumeration<? extends ZipEntry> e=zipFile.entries(); e.hasMoreElements(); ) {
            ZipEntry entry=e.nextElement();
            info("String_Node_Str",entry.getName());
            if (!entry.isDirectory() && (extractEmptyFiles || entry.getSize() > 0)) {
              out=targetDir.getOutputStream(targetDirNameResolved + "String_Node_Str" + entry.getName(),false);
              in=zipFile.getInputStream(entry);
              IOUtils.copy(in,out);
              filePaths.add(targetDirNameResolved);
            }
          }
        }
 catch (        IOException e) {
          throw new IoException(e);
        }
 finally {
          IOUtils.closeQuietly(in);
          IOUtils.closeQuietly(out);
          IOUtils.closeQuietly(zipFile);
          FileUtils.deleteQuietly(localZipFile);
        }
        if (deleteOnComplete) {
          sourceDir.delete(fileName);
        }
        log(LogLevel.INFO,"String_Node_Str",fileName);
        getComponentStatistics().incrementNumberEntitiesProcessed(threadNumber);
      }
    }
    if (filePaths.size() > 0) {
      callback.sendMessage(null,filePaths);
    }
  }
}

Fixed version (ground truth):
@Override public void handle(Message inputMessage,ISendMessageCallback callback,boolean unitOfWorkBoundaryReached){
  if (ComponentUtils.getPayloadType(inputMessage.getPayload()) == ComponentUtils.PAYLOAD_TYPE_LIST_STRING) {
    List<String> files=inputMessage.getPayload();
    ArrayList<String> filePaths=new ArrayList<String>();
    for (    String fileName : files) {
      log(LogLevel.INFO,"String_Node_Str",fileName);
      FileInfo sourceZipFile=sourceDir.listFile(fileName);
      if (mustExist && sourceZipFile == null) {
        throw new IoException(String.format("String_Node_Str",fileName));
      }
      if (sourceZipFile != null) {
        File unzipDir=new File(LogUtils.getLogDir(),"String_Node_Str");
        unzipDir.mkdirs();
        File localZipFile=copyZipLocally(fileName,unzipDir);
        ZipFile zipFile=getNewZipFile(localZipFile);
        InputStream in=null;
        OutputStream out=null;
        try {
          String targetDirNameResolved=resolveParamsAndHeaders(targetRelativePath,inputMessage);
          if (targetSubDir) {
            targetDirNameResolved=targetDirNameResolved + "String_Node_Str" + FilenameUtils.removeExtension(new FileInfo(fileName,false,0).getName());
          }
          for (Enumeration<? extends ZipEntry> e=zipFile.entries(); e.hasMoreElements(); ) {
            ZipEntry entry=e.nextElement();
            info("String_Node_Str",entry.getName());
            if (!entry.isDirectory() && (extractEmptyFiles || entry.getSize() > 0)) {
              String relativePathToEntry=targetDirNameResolved + "String_Node_Str" + entry.getName();
              out=targetDir.getOutputStream(relativePathToEntry,false);
              in=zipFile.getInputStream(entry);
              IOUtils.copy(in,out);
              filePaths.add(relativePathToEntry);
            }
          }
        }
 catch (        IOException e) {
          throw new IoException(e);
        }
 finally {
          IOUtils.closeQuietly(in);
          IOUtils.closeQuietly(out);
          IOUtils.closeQuietly(zipFile);
          FileUtils.deleteQuietly(localZipFile);
        }
        if (deleteOnComplete) {
          sourceDir.delete(fileName);
        }
        log(LogLevel.INFO,"String_Node_Str",fileName);
        getComponentStatistics().incrementNumberEntitiesProcessed(threadNumber);
      }
    }
    if (filePaths.size() > 0) {
      callback.sendMessage(null,filePaths);
    }
  }
}