NS_I_CUB_START (0x400D0051): Content Server Starting Up — What It Means

When You'll See This Message

You're checking the server logs — maybe after a scheduled restart or a crash — and you spot this line:

[NS_I_CUB_START] Content Server %1 (%2) is starting

That's it. Just a single line, no stack trace, no warnings around it. The trigger is always the same: the Documentum Content Server process (usually content_server.exe on Windows, or the docbase daemon on Linux) has received a start command. Could be from servermanager, a reboot of the host, or a manual dm_start_server call. The placeholders %1 and %2 will show the server name and the docbase name you configured.

Root Cause: Normal Service Startup

What's actually happening here is the server is emitting an informational trace at the start of its initialization sequence. The code NS_I_CUB_START maps to the constant 0x400D0051 in the Documentum error code system — that 0x400D prefix marks it as an informational event, not an error. The server hasn't finished loading yet; it's just announcing "I'm about to start."

This message alone doesn't tell you anything went wrong. It's the equivalent of a car's engine turning over. If you see it and nothing follows — no "server ready" message, no further activity — then you have a problem worth investigating. But the message itself? Harmless.

What to Do (and What to Skip)

Skip the panic. This is not a fix situation — it's a "confirm normal operation" situation. Here's the only check that matters:

1. Confirm the server finished starting. Look for a matching [NS_I_CUB_READY] or [NS_I_SERVER_READY] message in the same log file, typically within 30–60 seconds. If you see it, the server started cleanly.
2. Check the surrounding log lines. If there's an error code like [DM_SESSION_E_SESSION_FAIL] or [DM_DOCBROKER_E_NO_DOCBROKER] right after the start message, that's the real problem. The start event is just context.
3. Verify the server process is alive. On Linux: ps aux | grep content. On Windows: Task Manager or Get-Process -Name content_server.
4. If you're automating restarts, just ignore this line. Filter it out of your monitoring alerts — it's noise. Only alert on errors or timeouts.

If the Server Never Becomes Ready

When you see NS_I_CUB_START but the server hangs, check these:

• Docbroker connection — Is the docbroker running and reachable on the expected port (default 1489)? The Content Server tries to register itself during startup.
• License file — A missing or expired license can cause the startup to stall. Look for [DM_LICENSE_E_EXPIRED] in the logs.
• Storage or file permissions — The server needs read/write access to its data directories and the $DOCUMENTUM (or %DOCUMENTUM%) path. Check df and ls -la on Linux, or properties on Windows.
• Component services — If you're using job queues, BPM, or XPlore, make sure those supporting services are up before the Content Server starts. Some configurations block startup until dependencies are met.

The code 0x400D0051 itself isn't the enemy. It's just the announcement. The real fix is whatever prevents the server from completing its startup after that announcement.