Remove Jackson byte[] workaround

[schlosna]

General

Before this PR:

#6750 added performance workaround until FasterXML/jackson-core#1081 merged upstream in 2.16.0 as AtlasDB was not yet on 2.16.0+.

After this PR:

==COMMIT_MSG==
Now that AtlasDB has upgraded to Jackson 2.16.1, remove performance workaround that landed upstream in Jackson 2.16.0. See FasterXML/jackson-core#1081

Removes changes from #6750

==COMMIT_MSG==

Priority:

Concerns / possible downsides (what feedback would you like?):

Is documentation needed?:

Compatibility

Does this PR create any API breaks (e.g. at the Java or HTTP layers) - if so, do we have compatibility?:

Does this PR change the persisted format of any data - if so, do we have forward and backward compatibility?:

The code in this PR may be part of a blue-green deploy. Can upgrades from previous versions safely coexist? (Consider restarts of blue or green nodes.):

Does this PR rely on statements being true about other products at a deployment - if so, do we have correct product dependencies on these products (or other ways of verifying that these statements are true)?:

Does this PR need a schema migration?

Testing and Correctness

What, if any, assumptions are made about the current state of the world? If they change over time, how will we find out?:

What was existing testing like? What have you done to improve it?:

If this PR contains complex concurrent or asynchronous code, is it correct? The onus is on the PR writer to demonstrate this.:

If this PR involves acquiring locks or other shared resources, how do we ensure that these are always released?:

Execution

How would I tell this PR works in production? (Metrics, logs, etc.):

Has the safety of all log arguments been decided correctly?:

Will this change significantly affect our spending on metrics or logs?:

How would I tell that this PR does not work in production? (monitors, etc.):

If this PR does not work as expected, how do I fix that state? Would rollback be straightforward?:

If the above plan is more complex than “recall and rollback”, please tag the support PoC here (if it is the end of the week, tag both the current and next PoC):

Scale

Would this PR be expected to pose a risk at scale? Think of the shopping product at our largest stack.:

Would this PR be expected to perform a large number of database calls, and/or expensive database calls (e.g., row range scans, concurrent CAS)?:

Would this PR ever, with time and scale, become the wrong thing to do - and if so, how would we know that we need to do something differently?:

Development Process

Where should we start reviewing?:

If this PR is in excess of 500 lines excluding versions lock-files, why does it not make sense to split it?:

Please tag any other people who should be aware of this PR:
@jeremyk-91
@sverma30
@raiju

[changelog-app]

Generate changelog in changelog/@unreleased

What do the change types mean?

• feature: A new feature of the service.
• improvement: An incremental improvement in the functionality or operation of the service.
• fix: Remedies the incorrect behaviour of a component of the service in a backwards-compatible way.
• break: Has the potential to break consumers of this service's API, inclusive of both Palantir services
  and external consumers of the service's API (e.g. customer-written software or integrations).
• deprecation: Advertises the intention to remove service functionality without any change to the
  operation of the service itself.
• manualTask: Requires the possibility of manual intervention (running a script, eyeballing configuration,
  performing database surgery, ...) at the time of upgrade for it to succeed.
• migration: A fully automatic upgrade migration task with no engineer input required.

Note: only one type should be chosen.

How are new versions calculated?

• ❗The break and manual task changelog types will result in a major release!
• 🐛 The fix changelog type will result in a minor release in most cases, and a patch release version for patch branches. This behaviour is configurable in autorelease.
• ✨ All others will result in a minor version release.

Type

• Feature
• Improvement
• Fix
• Break
• Deprecation
• Manual task
• Migration

Description

Now that AtlasDB has upgraded to Jackson 2.16.1, remove performance workaround that landed upstream in Jackson 2.16.0. See FasterXML/jackson-core#1081

Removes changes from #6750

Check the box to generate changelog(s)

• Generate changelog entry

[ergo14]

Looks reasonable to me! Only thing I am curious about is how we'd catch a regression in Jackson for this (either because of actual reverts on their sides, or if we are forced to downgrade or robots do it)

[schlosna]

Looks reasonable to me! Only thing I am curious about is how we'd catch a regression in Jackson for this (either because of actual reverts on their sides, or if we are forced to downgrade or robots do it)

If Jackson were to revert or alter behavior, I don't think we have a great way to catch that change outside of seeing changes in continuous profiling (e.g. indicating increase in 8KiB allocations due to InputStreamReader's allocated buffer).