Diogo Sousa created DERBY-6679:
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Summary: Possible Atomicity Violation in BaseMonitor.shutdown()
Key: DERBY-6679
URL: https://issues.apache.org/jira/browse/DERBY-6679
Project: Derby
Issue Type: Bug
Components: Services
Affects Versions: 10.10.2.0
Environment: all
Reporter: Diogo Sousa
Priority: Minor
In org.apache.derby.impl.services.monitor.BaseMonitor there might be an
atomicity violation in method shutdown(), lines 181-206:
> for (;;) {
> synchronized (this) {
> 181: position = services.size() - 1;
> if (position == 0)
> break;
> ...
> }
> ...
> }
> ...
> 206: ((TopService) services.get(0)).shutdown();
Between the execution of lines 181 and 206 a concurrent thread may remove the
only remaining service, causing the access to "services" in line 206 to fail.
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