awoestmann opened a new issue, #2584:
URL: https://github.com/apache/jena/issues/2584
### Version
4.9.0
### What happened?
After about a week of runtime our server just returns the error below and is
no longer recoverable without a restart.
This seems to be similiar to #1499.
### Relevant output and stacktrace
```shell
java.lang.Error: Maximum lock count exceeded
at
java.base/java.util.concurrent.locks.ReentrantReadWriteLock$Sync.fullTryAcquireShared(ReentrantReadWriteLock.java:535)
at
java.base/java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryAcquireShared(ReentrantReadWriteLock.java:494)
at
java.base/java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1078)
at
java.base/java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:738)
at
org.apache.jena.dboe.storage.system.DatasetGraphTxnCtl.beginMultiMode(DatasetGraphTxnCtl.java:334)
at
org.apache.jena.dboe.storage.system.DatasetGraphTxnCtl.tryNonExclusiveMode(DatasetGraphTxnCtl.java:252)
at
org.apache.jena.dboe.storage.system.DatasetGraphTxnCtl.enterTransaction(DatasetGraphTxnCtl.java:110)
at
org.apache.jena.dboe.storage.system.DatasetGraphTxnCtl.begin(DatasetGraphTxnCtl.java:74)
at org.apache.jena.sparql.core.DatasetImpl.begin(DatasetImpl.java:114)
[...]
```
### Are you interested in making a pull request?
None
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