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  1. Core Server
  2. SERVER-21751

Change _id format in local.startup_log collection to avoid duplicate key errors in systems missing RTC

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Minor - P4
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: Backlog
    • Component/s: Admin, Diagnostics
    • Labels:
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      Description

      We are running mongod on an embedded device (sounds weird, I know...), and since we have no RTC on the device, it always starts from epoch.

      This makes the logging at startup likely to fail after a few boots, since the _id key is constructed from the system hostname appended with the milliseconds since epoch:
      https://github.com/mongodb/mongo/blob/master/src/mongo/db/db.cpp#L215

      Would it be possible to make the index key an auto incremented value or something similar?

      Until now, I have mitigated the problem by removing the startup logging entirely from db/db.cpp:
      https://github.com/mongodb/mongo/blob/master/src/mongo/db/db.cpp#L647

      Can this cause be problems in other conexts?

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              Assignee:
              backlog-server-security Backlog - Security Team
              Reporter:
              mnhu Martin Hundebøll
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                Created:
                Updated: