Given:
jdk 19.0.2.7 (Temurin)
sshd-core 2.10.0
sshd-common 2.10.0
slf4j-api 1.7.36
attached code causes circa 50 exceptions:
Exception in thread "Thread-3" Exception in thread "Thread-2"
java.lang.IllegalStateException: Executor has been shut down
at
org.apache.sshd.common.util.ValidateUtils.createFormattedException(ValidateUtils.java:213)
at
org.apache.sshd.common.util.ValidateUtils.throwIllegalStateException(ValidateUtils.java:207)
at
org.apache.sshd.common.util.ValidateUtils.checkState(ValidateUtils.java:184)
at
org.apache.sshd.common.util.threads.NoCloseExecutor.execute(NoCloseExecutor.java:100)
at
java.base/sun.nio.ch.AsynchronousChannelGroupImpl.executeOnPooledThread(AsynchronousChannelGroupImpl.java:190)
at java.base/sun.nio.ch.Invoker.invokeIndirectly(Invoker.java:215)
at java.base/sun.nio.ch.Invoker.invokeIndirectly(Invoker.java:316)
at
java.base/sun.nio.ch.WindowsAsynchronousServerSocketChannelImpl$AcceptTask.failed(WindowsAsynchronousServerSocketChannelImpl.java:288)
at java.base/sun.nio.ch.Iocp$EventHandlerTask.run(Iocp.java:389)
at java.base/java.lang.Thread.run(Thread.java:1589)
Code causing exception:
public static void main(String[] args) throws Exception {
for (int i = 0; i < 100; i++) {
var sshd = SshServer.setUpDefaultServer();
var hostKeyProvider = new SimpleGeneratorHostKeyProvider(
Paths.get(".", "cert"));
hostKeyProvider.setAlgorithm(KeyUtils.RSA_ALGORITHM);
sshd.setKeyPairProvider(hostKeyProvider);
sshd.start();
sshd.stop(false);
}
}
This is just a code to easily reproduce the exception. In our product
we start and stop the server at a far way lower rate, but still we
observe the exception being thrown.
I wonder if there should be any additional method called after/before
server stop or if this is some kind of a bug, or is the server restart
somehow forbidden or unadvised?
Or maybe it is this specific jvm fault
*Sławomir Skałka*
--
*For more information on how and why we collect your personal
information, please visit our Privacy Policy
<https://www.motorolasolutions.com/en_us/about/privacy-policy.html?elqTrackId=8980d888905940e39a2613a7a3dcb0a7&elqaid=2786&elqat=2#privacystatement>.*
