in common/src/main/java/org/apache/rocketmq/schema/registry/common/utils/CommonUtil.java [97:107]
public static File mkdir(File fileDir) {
if (fileDir.exists() && !fileDir.isDirectory()) {
throw new SchemaException("Not a directory: " + fileDir.getAbsolutePath());
}
if (!fileDir.exists() && !fileDir.mkdirs()) {
throw new SchemaException("Couldn't create directory: " + fileDir.getAbsolutePath());
}
return fileDir;
}