10.3 Domino Console message: Insufficient TCP sockets

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Problem: During a test run with 1500 simulated Notes users, the system started processing the first users, but we then got multiple messages on the Domino console saying: Insufficient TCP sockets. Many of the Notes clients showed messages saying they were unable to connect to the server.

Cause: TCP sockets on Linux relate to file descriptors. When we issued ulimit -a from the user ID that started Domino, we saw the number of open files (-n) was 1024. This should have been set higher, as in the installation instructions. We think this problem occurred because we logged in as the root user, then switched to domserva using su domserva. This does not run the ssh daemon, and so it did not read the limits.conf file.

Solution: We changed limits/conf so the number of file descriptors applies to all users, not just domserva. We confirmed this was ok by logging in as the root user, then doing su domserva and running ulimit -a. It showed the expected number of open files: 20000 soft, and 49152 hard.

For information about a similar situation, refer to "/etc/security/limits.conf" on page 132.

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