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Type:
Improvement
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Diagnostics, Internal Code
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Fully Compatible
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Service Arch 2022-04-04, Service Arch 2022-04-18, Service Arch 2022-05-02, Service Arch 2022-05-16, Service Arch 2022-05-30, Service Arch 2022-06-13, Service Arch 2022-06-27, Service Arch 2022-07-11, Service Arch 2022-07-25, Service Arch 2022-08-08
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(copied to CRM)
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4
If an invariant is hit while processing an incoming client command, the command being processed should be logged (as it would have been prior to running, if the COMMAND logLevel had been 2 or more).
This is because by default commands are only logged after they have finished running, but this will never happen if an invariant kills the server midway through the command. Diagnostically it's invaluable to know the command (including arguments) that was in progress when the invariant triggered, and it's common to lament the absence of this info when invariants are hit in the field or in production (because it may not be possible to reproduce, and core dumps are unlikely to be available).
Desired change:
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2019-05-08T02:25:10.859+0000 F - [conn216296] Invariant failure params.descriptor src/mongo/db/query/stage_builder.cpp 102
+2019-05-08T02:25:10.859+0000 F COMMAND [conn216296] in-progress command: foo.$cmd { find: "bar", filter: { ... }, ... }
2019-05-08T02:25:10.859+0000 F - [conn216296]
***aborting after invariant() failure
2019-05-08T02:25:10.912+0000 F - [conn216296] Got signal: 6 (Aborted).