hd42 opened a new issue, #2655:
URL: https://github.com/apache/logging-log4j2/issues/2655
## Description
I am using an Eclipse plugin that uses Apache POI, which in turn uses Log4j.
It runs fine in most configurations, but in some constellations I haven't been
able to conclusively pin down (installed the same version twice, one works, the
other reproducibly blocks), the UI hangs indefinitely. I took thread dumps in
multiple occasions and the main thread always is parked inside
ProviderUtil.lazyInit.
What could be the cause of this?
## Configuration
**Version:** 2.23.1
**Operating system:** Windows 10
**JDK:** different versions, including JustJ (17.0.10) and Temurin (21.0.3)
## Logs
```
"main" #1 [1584] prio=6 os_prio=0 cpu=14515.62ms elapsed=198.83s
tid=0x000001f833061830 nid=1584 waiting on condition [0x0000002f0f6fb000]
java.lang.Thread.State: WAITING (parking)
at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
- parking to wait for <0x00000000813aff10> (a
java.util.concurrent.locks.ReentrantLock$NonfairSync)
at
java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:221)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire([email protected]/AbstractQueuedSynchronizer.java:754)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireInterruptibly([email protected]/AbstractQueuedSynchronizer.java:1010)
at
java.util.concurrent.locks.ReentrantLock$Sync.lockInterruptibly([email protected]/ReentrantLock.java:161)
at
java.util.concurrent.locks.ReentrantLock.lockInterruptibly([email protected]/ReentrantLock.java:372)
at
org.apache.logging.log4j.util.ProviderUtil.lazyInit(ProviderUtil.java:151)
at
org.apache.logging.log4j.util.ProviderUtil.hasProviders(ProviderUtil.java:138)
at org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:89)
at org.apache.poi.util.IOUtils.<clinit>(IOUtils.java:43)
at org.apache.poi.poifs.filesystem.FileMagic.valueOf(FileMagic.java:209)
at
org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:222)
at
org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:185)
```
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