jackson-core
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FasterXML
`NUL`-corrupted keys, values on JSON serialization
First posted in discussions: https://github.com/FasterXML/jackson/discussions/215
Jackson version: 2.12.6
We have observed sporadic instances of serialized JSON messages containing corrupted keys and/or values (correct length, but some amount of string suffix is replaced with NUL (0) bytes).
From our metrics, it seemed to recur every 2-4 days on average. We have swapped in a fork of jackson-core with fields marked as volatile in SerializedString (https://github.com/HubSpot/jackson-core/commit/4d3bd2db409468e275ca4c7c471b523c5d1c18d9) and have not seen the issue in > 10 days now.
Even though we saw this once or twice a while back on JDK 17, it seems to have been exacerbated with JDK 21. We are also running on ARM64 instances, which could have some behavior contributing here.
I have not been able to reproduce this in isolation, unfortunately. Happy to help provide any additional information. We are working on an upgrade to jackson 2.18 but I see those fields are unchanged in that branch as well.
Can you provide us with your code? Ideally as a PR but paste it here if a PR is not something you have time for.
PS We are unlikely to release a new v2.12 fix. The fix is likely to only go in more recent release lines - 2.17 and possibly 2.16, etc.
Oh I wasn't planning on pushing for a 2.12 release; we are definitely moving to a higher version. I only called it out as a clarifying point of context.
Which code are you looking for? The actual invocations to the ObjectMapper? Types being serialized?
Which code are you looking for? The actual invocations to the ObjectMapper? Types being serialized?
I was asking for a PR with the changes you want to SerializedString.
ah, sorry. opened PR https://github.com/FasterXML/jackson-core/pull/1276
