Networker: NMC Alert "Cannot write to Database - errno Invalid Argument" Due to TCP Connection Timeout

Summary: NMC was generating the following alert: Cannot write to /Database/Database/97/08/50dea767-00000006-2b43c6c3-6a43c6c3-edd60c00-c89dd629 - errno Invalid argument

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Symptoms

The NetWorker Management Console (NMC) Monitoring Tab reports the following error frequently:

Cannot write to /Database/Database/97/08/50dea767-00000006-2b43c6c3-6a43c6c3-edd60c00-c89dd629 - errno Invalid argument

The NetWorker server daemon logs also report:

XXXXXXXX nsrd NSR info 9 %s %s: %s 3 0 5 media 0 9 emergency 0 120 Cannot write to /Database/Database/97/08/50dea767-00000006-2b43c6c3-6a43c6c3-edd60c00-c89dd629 - errno Invalid argument.

Cause

The issue was likely caused by intermittent network session disconnections or timeout conditions between NetWorker components. When long-running operations experienced idle periods, the underlying TCP connections could be prematurely terminated by the operating system, firewall, or network devices. This resulted in communication interruptions while updating or writing information to the NetWorker database, leading to the "Cannot write to /Database/Database... errno Invalid argument" alert.

Resolution

Configre The NW_TCP_KEEPIDLE_SECS, NW_TCP_KEEPINTVL_SECS, NW_TCP_KEEPCNT, and NSR_SOCK_BUF_SIZE environment variabled on the NetWorker server operating system.
The full list of per-operating system instructions for TCP parameters are documented in the following article: NetWorker: Best practices for networking configuration

Produse afectate

NetWorker Family, NetWorker
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Article Number: 000486369
Article Type: Solution
Ultima modificare: 07 iul. 2026
Version:  1
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