NID-00135: There are number active threads.

SQL> select name,open_mode from v$database;

NAME      OPEN_MODE
--------- --------------------
PROD      MOUNTED

[oracle@oracle sujeet$ nid TARGET=SYS/sys123 DBNAME=PROD SETNAME=YES

DBNEWID: Release 11.1.0.7.0 - Production on Thu Apr 26 18:04:18 2018

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Connected to database ACSEBSP (DBID=2199446376)

Connected to server version 11.1.0

NID-00135: There are 1 active threads


Change of database name failed during validation - database is intact.
DBNEWID - Completed with validation errors.

Solution:-

Action: Ensure that all threads are closed before retrying the operation. Start and open the database to perform crash recovery, then shut down with the NORMAL or IMMEDIATE options to close it cleanly. Finally, try running the utility again.


SQL> alter database open;

Database altered.

SQL> shutdown immediate
Database closed.Database dismounted.
ORACLE instance shut down.

SQL> startup mount
ORACLE instance started.


[oracle@oracle sujeet$ nid TARGET=SYS/sys123 DBNAME=PROD SETNAME=YES

I hope issue resolved.