Netty 4.2.0.RC3 - exception on shutdownGracefully #14872
Description
On netty 4.2.0.RC3 I see exceptions when calling shutdownGracefully with io_uring, while clients are connected. It is a custom BungeeCord implementation. I'm not sure if the event loops should be closed in a different way or it is a small bug inside the code.
Code:
getLogger().info( "Closing IO threads" );
bossEventLoopGroup.shutdownGracefully();
workerEventLoopGroup.shutdownGracefully();
while (true) {
try {
bossEventLoopGroup.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
workerEventLoopGroup.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
break;
} catch (InterruptedException ignored) {}
}
getLogger().info( "Thank you and goodbye" );
Error:
Closing IO threads
[io.netty.channel.AbstractChannel]: Can't invoke task later as EventLoop rejected it
java.util.concurrent.RejectedExecutionException: event executor terminated
at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:1005) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:388) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:381) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:907) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute0(SingleThreadEventExecutor.java:873) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:863) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.AbstractChannel$AbstractUnsafe.invokeLater(AbstractChannel.java:888) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.AbstractChannel$AbstractUnsafe.deregister(AbstractChannel.java:668) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.AbstractChannel$AbstractUnsafe.fireChannelInactiveAndDeregister(AbstractChannel.java:628) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:611) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.AbstractIoUringChannel$AbstractUringUnsafe.closeNow(AbstractIoUringChannel.java:589) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.AbstractIoUringChannel$AbstractUringUnsafe.handleDelayedClosed(AbstractIoUringChannel.java:499) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.AbstractIoUringChannel$AbstractUringUnsafe.handle(AbstractIoUringChannel.java:425) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.IoUringIoHandler$DefaultIoUringIoRegistration.handle(IoUringIoHandler.java:562) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.IoUringIoHandler.handle(IoUringIoHandler.java:267) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.CompletionQueue.process(CompletionQueue.java:95) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.uring.IoUringIoHandler.destroy(IoUringIoHandler.java:366) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.channel.SingleThreadIoEventLoop.cleanup(SingleThreadIoEventLoop.java:245) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1147) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[x.jar:git:Waterfall-Bootstrap:1.21-R0.1-SNAPSHOT:289f726:unknown]
at java.lang.Thread.run(Thread.java:1575) [?:?]
Thank you and goodbye