Failed to get operation result within specified timeout: xxx msec

[xiaoming19871124]

Version

2.14.0

Bug description

Hello everybody, when I use by version 2.14 to connect a terminal, I always got an error like this:
"Failed to get operation result within specified timeout: 30000 msec"

But however I set longer timout number, I still got such timeout error after time what I set;
I had tried to run sshd from other system with no Linx System, it works correctly;

The actual scene such as below:
Linx:~/ssh_test/sshd# cat /etc/os-release
PRETTY_NAME="Linx GNU/Linux 6.0.100 (buster)"
NAME="Linx GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=Linx
HOME_URL="http://www.linx-info.com/"

Linx:~/ssh_test/sshd# java --version
java 17.0.4 2022-07-19 LTS
Java(TM) SE Runtime Environment (build 17.0.4+11-LTS-179)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.4+11-LTS-179, mixed mode, sharing)

Actual behavior

09:56:11.534 [main] INFO com.hg.common.utils.SshdUtil - ############### Connect to host(sshd): 192.168.70.81:22 by user: root...
09:56:11.543 [main] INFO com.hg.common.utils.SshdUtil - ############### Execute Command(sshd): ls -la
09:56:11.932 [main] DEBUG org.apache.sshd.common.util.security.SecurityUtils - register(BC) not registered - enabled=true, supported=false
09:56:11.946 [main] DEBUG org.apache.sshd.common.util.security.SecurityUtils - register(EdDSA) not registered - enabled=true, supported=false
09:56:12.277 [main] INFO org.apache.sshd.common.io.DefaultIoServiceFactoryFactory - No detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
09:56:12.321 [main] INFO org.apache.sshd.client.config.hosts.DefaultConfigFileHostEntryResolver - resolveEffectiveResolver([email protected]:22/null) no configuration file at /root/.ssh/config
09:56:12.322 [main] DEBUG org.apache.sshd.client.config.hosts.DefaultConfigFileHostEntryResolver - resolveEffectiveHost([email protected]:22/null) => null
09:56:12.323 [main] DEBUG org.apache.sshd.client.SshClient - connect([email protected]:22) no overrides
09:56:12.348 [main] DEBUG org.apache.sshd.common.io.nio2.Nio2Connector - Connecting to /192.168.70.81:22
09:56:12.355 [main] DEBUG org.apache.sshd.common.io.nio2.Nio2Connector - setOption(SO_REUSEADDR)[true] from property=Property[socket-reuseaddr](Boolean]
09:56:12.374 [sshd-SshClient[55a561cf]-nio2-resume-thread-1] DEBUG org.apache.sshd.common.io.nio2.Nio2Connector - connect(/192.168.70.81:22): waiting for connection (timeout=60000ms)
09:56:12.380 [sshd-SshClient[55a561cf]-nio2-resume-thread-1] DEBUG org.apache.sshd.common.io.nio2.Nio2Session - Creating IoSession on /192.168.70.81:33058 from /192.168.70.81:22 via null
09:56:42.422 [main] INFO com.hg.common.utils.SshdUtil - Login Host: 192.168.70.81 Error
org.apache.sshd.common.SshException: DefaultConnectFuture[root@/192.168.70.81:22]: Failed to get operation result within specified timeout: 30000 msec
at org.apache.sshd.common.future.AbstractSshFuture.lambda$verifyResult$1(AbstractSshFuture.java:114)
at org.apache.sshd.common.future.AbstractSshFuture.formatExceptionMessage(AbstractSshFuture.java:206)
at org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:114)
at org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:55)
at org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:36)
at org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:84)
at org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:69)
at com.hg.common.utils.SshdUtil.initialSession(SshdUtil.java:75)
at com.hg.common.utils.SshdUtil.runString(SshdUtil.java:503)
at com.hg.common.utils.SshdUtil.connectBySshd(SshdUtil.java:608)
at com.hg.common.utils.SshdUtil.main(SshdUtil.java:589)
Caused by: java.util.concurrent.TimeoutException: Timed out after 30000 msec
at org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:113)
... 8 common frames omitted
09:56:42.427 [main] ERROR com.hg.common.utils.SshdUtil - Host:192.168.70.81 User:root Login Error
09:56:42.428 [main] INFO com.hg.common.utils.SshdUtil - ############### Execute Result(sshd):

Expected behavior

I wish I can set one or more params that let it works normally;
However thinks for everybody's help and suggestion;

Relevant log output

No response

Other information

No response

[tomaswolf]

Most probably this is a duplicate of #642 and is caused by entropy starvation. Possible work-arounds:

• Stay on 2.13.x and wait for the next release of Apache MINA sshd.
• Or use the 2.14.1-SNAPSHOT artifacts from the Apache Snapshots maven repository.
• Or according to Stackoverflow run with a system property set: -Djava.security.egd=file:/dev/./urandom.