You want to log in to Hitachi Device Manager (HDvM), but an Internal Server Error is displayed in the Web Client. You can ping the HDvM server, but no other operations can be performed. When…

Question

Options

• AThat the firewall is open for port 23015.
• BThat the HDvM's licensed capacity is sufficient.
• CThat Common Component services are running.
• DThat the memory heap size is sufficient.

• A
  8% (3)
• B
  16% (6)
• C
  76% (28)

Explanation

When HDvM returns an Internal Server Error during login, it means the server is reachable but something is broken at the application layer - not the network. Common Component (C) is the core middleware that powers HDvM's web services and authentication; if those services are stopped or crashed, every web operation fails with exactly this symptom. Insufficient memory heap (D) causes the underlying Java application server (Tomcat) to throw OutOfMemoryErrors, which surface to users as Internal Server Errors during any request, including login.

A is wrong because you're already receiving an HTTP response (an error page), which means the port is reachable - a firewall block would cause a connection timeout or refused error, not an Internal Server Error. B is wrong because licensed capacity governs how much storage HDvM can manage; it doesn't block authentication or cause server-side errors.

Memory tip: Think "Can the engine run?" - Common Component is the engine (must be running), and heap memory is the fuel (must be sufficient). Both must be healthy before HDvM can serve any web request.

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