mkozioro opened a new pull request #8820:
URL: https://github.com/apache/pulsar/pull/8820
Fixes #8783
Execute removing non-persistent subscription of topic from different thread
to avoid deadlock when removing inactive subscriptions.
<!--
### Contribution Checklist
- Name the pull request in the form "[Issue XYZ][component] Title of the
pull request", where *XYZ* should be replaced by the actual issue number.
Skip *Issue XYZ* if there is no associated github issue for this pull
request.
Skip *component* if you are unsure about which is the best component.
E.g. `[docs] Fix typo in produce method`.
- Fill out the template below to describe the changes contributed by the
pull request. That will give reviewers the context they need to do the review.
- Each pull request should address only one issue, not mix up code from
multiple issues.
- Each commit in the pull request has a meaningful commit message
- Once all items of the checklist are addressed, remove the above text and
this checklist, leaving only the filled out template below.
**(The sections below can be removed for hotfixes of typos)**
-->
### Motivation
We have non persistent topics with configured removing inactive
subscriptions. We've noticed, that removing subscriptions sometimes hangs.
After investigation, we've noticed that it hangs on remove operation of
ConcurrentOpenHashMap.
We've found that removal operation is made inside lambda of forEach method
on same collection.
Problem was causing not only problems with subscription removal, but after
it happened once, problems with creating new subscriptions.
### Modifications
We've modified code and run remove operation in other thread to avoid
deadlock.
### Verifying this change
- [ ] Make sure that the change passes the CI checks.
*(Please pick either of the following options)*
This change is a trivial rework / code cleanup without any test coverage.
### Does this pull request potentially affect one of the following parts:
*If `yes` was chosen, please highlight the changes*
- Dependencies (does it add or upgrade a dependency): (no)
- The public API: (no)
- The schema: (no)
- The default values of configurations: (no)
- The wire protocol: (no)
- The rest endpoints: (no)
- The admin cli options: (no)
- Anything that affects deployment: (no)
### Documentation
- Does this pull request introduce a new feature? (no)
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
