Comments (2)
Michael-A-McMahon
commented on June 9, 2024
Thanks for reporting this.
This could be a deadlock induced by threads contending for Oracle JDBC connection lock. If an Oracle JDBC connection is executing an async call, and a thread calls a method on that connection, that thread is blocked until the async call completes. This leads to deadlocks where all threads are blocked on method calls, and no threads are left to complete the async call.
Since the 0.4.0 release, Oracle R2DBC is designed to avoid this kind of deadlock. It should be the case that any JDBC method call gets pushed to AsyncLock.
It's possible that I've missed a JDBC call somewhere, and have not pushed it to the AsyncLock. This is my best guess as to the root cause of this issue.
A thread dump would be the best way to figure out where the issue is. Is it possible to provide that?
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Michael-A-McMahon
commented on June 9, 2024
I'm closing this issue now. Although I'm still a bit paranoid about having missed a blocking call somewhere.
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