NMDA: DB2 backup fails Error _nwbsa_senddata32: System detected error due to: sending a data buffer. Operation aborted

Error in db2diag.log

NMDA DB2 backup fails Error _nwbsa_senddata32: System detected error due to: sending a data buffer. Operation aborted

Error in NMDA /app/log/

DB2 Backup Hung with error: Unable to backup BIP database due to backup request failure, SQLCODE : -2025, SQL2025N An I/O error occurred. Error code: "3".

The DB2 buffer size too small.

1. Tune the DB2_BUFFER_SIZE as instructed in the NetWorker Module for Database and Applications Administration Guide. NMDA documentation is available through: Support for NetWorker Module for Databases and Applications | Manuals & Documents 
   
   NOTE: For scheduled backups, you can set the DB2_BUFFER_SIZE parameter as described in DB2 BUFFER SIZE section.
2. How to tune DB2 buffer pool size from IBM DB2 Manual: Setting the DB2 buffer pool size - IBM Documentation