[HDFS-14722] RBF: GetMountPointStatus should return mountTable information when getFileInfoAll throw IOException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Component/s: rbf
• Hadoop Flags: Reviewed
• Assignee: ZanderXu
• Reporter: ZanderXu
• Created: 12/Aug/19 10:26
• Updated: 24/Aug/19 06:52
• Resolved: 24/Aug/19 03:33

Description

When IOException in getFileInfoAll, we should return the mountTable informations instead of super information.

Code like:

// RouterClientProtocol#getMountPointStatus
try {
  String mName = name.startsWith("/") ? name : "/" + name;
  MountTableResolver mountTable = (MountTableResolver) subclusterResolver;
  MountTable entry = mountTable.getMountPoint(mName);
  if (entry != null) {
    RemoteMethod method = new RemoteMethod("getFileInfo",
        new Class<?>[] {String.class}, new RemoteParam());
    HdfsFileStatus fInfo = getFileInfoAll(
        entry.getDestinations(), method, mountStatusTimeOut);
    if (fInfo != null) {
      permission = fInfo.getPermission();
      owner = fInfo.getOwner();
      group = fInfo.getGroup();
      childrenNum = fInfo.getChildrenNum();
    } else {
      permission = entry.getMode();
      owner = entry.getOwnerName();
      group = entry.getGroupName();
    }
  }
} catch (IOException e) {
  LOG.error("Cannot get mount point: {}", e.getMessage());
}