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https://issues.apache.org/jira/browse/TOMEE-4731?focusedWorklogId=1049228&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1049228
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ASF GitHub Bot logged work on TOMEE-4731:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Oct/26 07:58
Start Date: 22/Oct/26 07:58
Worklog Time Spent: 10m
Work Description: rzo1 opened a new pull request, #3121:
URL: https://github.com/apache/tomee/pull/3121
https://issues.apache.org/jira/browse/TOMEE-4731
Threads created by `ManagedThreadFactoryImpl` (e.g. the workers of the
default `ManagedExecutorService`) run their whole life inside the default
context service, which clears the transaction context. The restorer created on
entering that context always called
`OpenEJB.getTransactionManager().resume(..)` on exit, even if `suspend()` had
returned `null`. When such a thread terminates after the container has been
shut down, the `TransactionManager` is gone and every pool thread dies with:
```
java.lang.NullPointerException: Cannot invoke
"jakarta.transaction.TransactionManager.resume(jakarta.transaction.Transaction)"
because the return value of
"org.apache.openejb.OpenEJB.getTransactionManager()" is null
at
org.apache.openejb.threads.impl.TxThreadContextProvider$TxThreadContextRestorer.endContext(TxThreadContextProvider.java:79)
```
### Changes
- `TxThreadContextClearingSnapshot.begin()` returns the no-op restorer if no
transaction was suspended.
- `TxThreadContextRestorer.endContext()` skips `resume` (logging a warning)
if a suspended transaction cannot be resumed because the `TransactionManager`
is no longer available.
- Behaviour while the container is running is unchanged: a suspended
transaction is still resumed.
### Tests
`TxThreadContextProviderTest`: no-op restorer without a transaction, a
suspended transaction is resumed, no failure once the `TransactionManager` is
gone, and a regression test for a managed thread terminating after shutdown.
Three of the four fail without the fix (two with exactly the NPE above); the
fourth guards the existing resume behaviour.
Issue Time Tracking
-------------------
Worklog Id: (was: 1049228)
Remaining Estimate: 0h
Time Spent: 10m
> TxThreadContextRestorer fails with NPE when managed threads end after the
> container shut down
> ---------------------------------------------------------------------------------------------
>
> Key: TOMEE-4731
> URL: https://issues.apache.org/jira/browse/TOMEE-4731
> Project: TomEE
> Issue Type: Bug
> Components: TomEE Core Server
> Affects Versions: 10.2.0
> Reporter: Richard Zowalla
> Assignee: Richard Zowalla
> Priority: Major
> Fix For: 11.0.0, 10.3.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
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