OF-3164: Avoid user lookup for JIDs without node to reduce exception overhead#3122
Open
guusdk wants to merge 1 commit intoigniterealtime:mainfrom
Conversation
guusdk
added
the
backport 5.0
…overhead Prevent execution of user lookup logic when the provided JID has no node. JIDs without a node part cannot represent a local user, yet currently flow through UserManager.isRegisteredUser(), which relies on exception-based control flow when the user does not exist. Thread dumps show significant CPU time spent constructing UserNotFoundException instances (Throwable.fillInStackTrace) on this hot path. This change short-circuits the lookup for node-less JIDs, avoiding the exception-heavy path and reducing unnecessary CPU usage under load. Note: This is a partial workaround. A full fix should refactor user existence checks to avoid exceptions for normal control flow.
akrherz
force-pushed
the
OF-3164_IsRegisteredUser-exception-based-control-flow-workaround
branch
from
db5aa1a to
4c36405
Compare
Member
|
rebased... |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Prevent execution of user lookup logic when the provided JID has no node. JIDs without a node part cannot represent a local user, yet currently flow through UserManager.isRegisteredUser(), which relies on exception-based control flow when the user does not exist.
Thread dumps show significant CPU time spent constructing UserNotFoundException instances (Throwable.fillInStackTrace) on this hot path.
This change short-circuits the lookup for node-less JIDs, avoiding the exception-heavy path and reducing unnecessary CPU usage under load.
Note: This is a partial workaround. A full fix should refactor user existence checks to avoid exceptions for normal control flow.