Even though this issue happened, the nexus is still running.
I pulled some logs from nexus.log; they are
2026-01-07 13:11:59,736+0000 ERROR [periodic-4-thread-1] *SYSTEM org.sonatype.nexus.blobstore.file.internal.datastore.metrics.DatastoreFileBlobStoreMetricsService - Failed to save blobstore metrics to db
org.sonatype.nexus.datastore.api.DataAccessException:
### Error rolling back transaction. Cause: org.h2.jdbc.JdbcSQLNonTransientConnectionException: The database has been closed [90098-232]
.......
### Error querying database. Cause: org.h2.jdbc.JdbcSQLNonTransientConnectionException: The database has been closed [90098-232]
### The error may exist in org.sonatype.nexus.content.maven.store.Maven2AssetDAO
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT * FROM maven2_asset WHERE repository_id = ? AND path = ? ;
### Cause: org.h2.jdbc.JdbcSQLNonTransientConnectionException: The database has been closed [90098-232]
Except the above error from log, I also found some information from nexus.trace.db file
Caused by: org.h2.mvstore.MVStoreException: Chunk 14836371 not found [2.3.232/9]
at org.h2.mvstore.DataUtils.newMVStoreException(DataUtils.java:996)
at org.h2.mvstore.FileStore.getChunk(FileStore.java:2014)
at org.h2.mvstore.FileStore.readPage(FileStore.java:1961)
at org.h2.mvstore.MVStore.readPage(MVStore.java:1021)
at org.h2.mvstore.MVMap.readPage(MVMap.java:632)
at org.h2.mvstore.Page$NonLeaf.getChildPage(Page.java:1158)
at org.h2.mvstore.CursorPos.traverseDown(CursorPos.java:61)
at org.h2.mvstore.MVMap.operate(MVMap.java:1766)
at org.h2.mvstore.MVMap.rewritePage(MVMap.java:690)
at org.h2.mvstore.FileStore.rewriteChunks(FileStore.java:1927)
at org.h2.mvstore.FileStore.compactRewrite(FileStore.java:1903)
at org.h2.mvstore.FileStore.rewriteChunks(FileStore.java:1862)
at org.h2.mvstore.RandomAccessStore.lambda$doHousekeeping$4(RandomAccessStore.java:734)
at org.h2.mvstore.MVStore.tryExecuteUnderStoreLock(MVStore.java:937)
at org.h2.mvstore.RandomAccessStore.doHousekeeping(RandomAccessStore.java:729)
at org.h2.mvstore.FileStore.writeInBackground(FileStore.java:1841)
at org.h2.mvstore.FileStore$BackgroundWriterThread.run(FileStore.java:2256)
2026-01-12 09:01:37.224429Z jdbc[6]: exception
org.h2.jdbc.JdbcSQLNonTransientConnectionException: The database has been closed [90098-232]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:690)
at org.h2.message.DbException.getJdbcSQLException(DbException.java:489)
I wouldn’t expect the stack traces you sent to cause 401 or 403 errors, the code was running a period task to save metrics information, and the exception you saw inside the nexus.trace.db file could indicate either a database corruption or maybe a h2 bug https://github.com/h2database/h2database/issues/4142?