minor error: closing JabRef Logger

[ilippert]

JabRef version

Other (please describe below)

Operating system

GNU / Linux

Details on version and operating system

JabRef 6.0--2024-11-05--4705977 Linux 6.12.6-200.fc41.x86_64 amd64 Java 21.0.5 JavaFX 23.0.1+4

Checked with the latest development build (copy version output from About dialog)

• I made a backup of my libraries before testing the latest development version.
• I have tested the latest development version and the problem persists

Steps to reproduce the behaviour

1. I run JabRef from the shell (given Linux gnome/package manager JabRef not registered #11417)
2. upon shutting down JabRef, the last lines in the shell are an Error.

Appendix

...

Log File

INFO: No open database detected
LOGGER ERROR: Failed to write log entry 'No open database detected' (java.lang.NullPointerException)
2025-01-13 17:33:24 [JabRef CachedThreadPool] org.jabref.logic.util.FallbackExceptionHandler.uncaughtException()
ERROR: Uncaught exception occurred in Thread[#99,JabRef CachedThreadPool,5,main]: org.apache.lucene.util.ThreadInterruptedException: java.lang.InterruptedException
	at org.apache.lucene.core@10.0.0/org.apache.lucene.index.IndexWriter.doWait(Unknown Source)
	at org.apache.lucene.core@10.0.0/org.apache.lucene.index.IndexWriter.forceMerge(Unknown Source)
	at org.jabref@6.0.6556/org.jabref.logic.search.indexing.DefaultLinkedFilesIndexer.optimizeIndex(Unknown Source)
	at org.jabref@6.0.6556/org.jabref.logic.search.indexing.DefaultLinkedFilesIndexer.closeIndex(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.InterruptedException
	at java.base/java.lang.Object.wait0(Native Method)
	at java.base/java.lang.Object.wait(Unknown Source)
	... 7 more
LOGGER ERROR: Failed to write log entry 'Uncaught exception occurred in Thread[#99,JabRef CachedThreadPool,5,main]' (java.lang.NullPointerException)

[ilippert]

in JabRef 6.0-alpha.33--2025-01-13--b701821
Linux 6.12.6-200.fc41.x86_64 amd64
Java 23.0.1
JavaFX 23.0.1+4

I get a different error

ERROR: Uncaught exception occurred in Thread[#72,JabRef CachedThreadPool,5,main]: org.apache.lucene.store.AlreadyClosedException: Lock instance already released: NativeFSLock(path=/home/ilippert/.local/share/jabref/lucene/4/636880bf--Literature-bibtex.bib/write.lock,impl=sun.nio.ch.FileLockImpl[0:9223372036854775807 exclusive invalid],creationTime=2025-01-13T17:52:42.73904522Z)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.store.NativeFSLockFactory$NativeFSLock.ensureValid(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.codecs.lucene94.Lucene94FieldInfosFormat.write(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.IndexingChain.flush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.DocumentsWriterPerThread.flush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.DocumentsWriter.doFlush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.DocumentsWriter.maybeFlush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.DocumentsWriter.flushAllThreads(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.IndexWriter.doFlush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.IndexWriter.flush(Unknown Source)
	at org.apache.lucene.core@10.1.0/org.apache.lucene.index.IndexWriter.forceMerge(Unknown Source)
	at org.jabref@6.0.15033/org.jabref.logic.search.indexing.DefaultLinkedFilesIndexer.optimizeIndex(Unknown Source)
	at org.jabref@6.0.15033/org.jabref.logic.search.indexing.DefaultLinkedFilesIndexer.closeIndex(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)

``