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Comments (4)

pksunkara avatar pksunkara commented on August 25, 2024 1

@liljaylj Do you have any idea what's happening here?

I don't think we have a test for this function, right?

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gjtorikian avatar gjtorikian commented on August 25, 2024 1

I encountered this issue as well. But what worked for me was

ALTER SYSTEM SET shared_preload_libraries = ulid;

rather than changing postgresql.conf.

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workingjubilee avatar workingjubilee commented on August 25, 2024

The source of this error is https://github.com/pgcentralfoundation/pgrx/blob/159295238f7513da2e4c7075b004cf0b5a60d30b/pgrx/src/lwlock.rs#L74-L77

Which is called by

pgx_ulid/src/lib.rs

Lines 73 to 75 in eb8e9cf

#[pg_extern]
fn gen_monotonic_ulid() -> ulid {
let mut shared_bytes = SHARED_ULID.exclusive();

There have been recent reports of various issues with the shared memory infrastructure in pgrx, unfortunately. This at least simply yields a fairly predictable error instead of UB, I suppose.

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pksunkara avatar pksunkara commented on August 25, 2024

I added docs. Please let me know if none of the two above steps works and I will re-open the issue.

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