spring - ssh访问Spring Boot应用程序

Question

在 Spring Boot 1.2.3.RELEASE 上尝试在 JDK 1.8、Windows 7 上设置 SSH。

我将 application.properties 配置为:

shell.ssh.port=2212
shell.ssh.enabled=true
shell.auth=simple
shell.auth.simple.user.name=user
shell.auth.simple.user.password=password

当应用程序启动并尝试通过putty访问它时，出现以下异常:

java.lang.IllegalStateException: No session available
    at org.apache.sshd.common.AbstractSessionIoHandler.exceptionCaught(AbstractSessionIoHandler.java:52) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.exceptionCaught(DefaultIoFilterChain.java:697) ~[mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextExceptionCaught(DefaultIoFilterChain.java:483) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1100(DefaultIoFilterChain.java:46) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.exceptionCaught(DefaultIoFilterChain.java:791) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.IoFilterAdapter.exceptionCaught(IoFilterAdapter.java:111) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextExceptionCaught(DefaultIoFilterChain.java:483) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireExceptionCaught(DefaultIoFilterChain.java:471) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextSessionCreated(DefaultIoFilterChain.java:359) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$700(DefaultIoFilterChain.java:46) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.sessionCreated(DefaultIoFilterChain.java:771) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.IoFilterAdapter.sessionCreated(IoFilterAdapter.java:79) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextSessionCreated(DefaultIoFilterChain.java:357) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireSessionCreated(DefaultIoFilterChain.java:350) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.service.IoServiceListenerSupport.fireSessionCreated(IoServiceListenerSupport.java:211) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.polling.AbstractPollingIoProcessor.addNow(AbstractPollingIoProcessor.java:514) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.polling.AbstractPollingIoProcessor.handleNewSessions(AbstractPollingIoProcessor.java:481) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$200(AbstractPollingIoProcessor.java:67) [mina-core-2.0.2.jar:na]
    at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1071) [mina-core-2.0.2.jar:na]
    at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64) [mina-core-2.0.2.jar:na]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_31]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_31]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_31]
Caused by: java.lang.AbstractMethodError: org.apache.sshd.common.keyprovider.AbstractKeyPairProvider.loadKeys()[Ljava/security/KeyPair;
    at org.apache.sshd.common.keyprovider.AbstractKeyPairProvider.getKeyTypes(AbstractKeyPairProvider.java:49) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.sshd.server.session.ServerSession.sendKexInit(ServerSession.java:331) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.sshd.server.session.ServerSession.<init>(ServerSession.java:92) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.sshd.server.session.SessionFactory.doCreateSession(SessionFactory.java:43) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.sshd.common.session.AbstractSessionFactory.createSession(AbstractSessionFactory.java:38) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.sshd.common.AbstractSessionIoHandler.sessionCreated(AbstractSessionIoHandler.java:37) ~[sshd-core-0.6.0.jar:0.6.0]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.sessionCreated(DefaultIoFilterChain.java:643) ~[mina-core-2.0.2.jar:na]
    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextSessionCreated(DefaultIoFilterChain.java:357) [mina-core-2.0.2.jar:na]

我在这里缺少什么吗？

谢谢。

---

更新: 感谢您的指点。这是我的依赖树:

[INFO] +- org.springframework.boot:spring-boot-starter-actuator:jar:1.2.3.RELEASE:compile
[INFO] |  \- org.springframework.boot:spring-boot-actuator:jar:1.2.3.RELEASE:compile
[INFO] \- org.springframework.boot:spring-boot-starter-remote-shell:jar:1.2.3.RELEASE:compile
[INFO]    +- org.crashub:crash.cli:jar:1.3.1:compile
[INFO]    +- org.crashub:crash.connectors.ssh:jar:1.3.1:compile
[INFO]    |  +- org.apache.sshd:sshd-core:jar:0.6.0:compile
[INFO]    |  +- org.apache.sshd:sshd-pam:jar:0.11.0:compile
[INFO]    |  |  \- net.sf.jpam:jpam:jar:1.1:compile
[INFO]    |  +- org.bouncycastle:bcpkix-jdk15on:jar:1.51:compile
[INFO]    |  \- org.apache.mina:mina-core:jar:2.0.2:compile
[INFO]    +- org.crashub:crash.embed.spring:jar:1.3.1:compile
[INFO]    +- org.crashub:crash.plugins.cron:jar:1.3.1:compile
[INFO]    |  \- it.sauronsoftware.cron4j:cron4j:jar:2.2.5:compile
[INFO]    +- org.crashub:crash.plugins.mail:jar:1.3.1:compile
[INFO]    |  \- javax.mail:mail:jar:1.4.7:compile
[INFO]    |     \- javax.activation:activation:jar:1.1:compile
[INFO]    +- org.crashub:crash.shell:jar:1.3.1:compile
[INFO]    \- org.codehaus.groovy:groovy:jar:2.3.11:compile

所有依赖项都显示为 spring-boot-starter-remote-shell 的传递性。我将尝试通过手动覆盖来修复。

Answer 1

我用jdk1.8启动了一个spring boot项目，添加了spring-boot-starter-remote-shell Maven 依赖项和您的配置，尝试了一下，一切都很顺利。

但是 java.lang.AbstractMethodError 让我怀疑类路径问题，所以我很快运行了 mvn dependency:tree关于我的项目，除其他外，spring-boot-starter-remote-shell:jar:1.2.3.RELEASE有org.apache.sshd:sshd-core:jar:0.11.0作为传递依赖，如下所示。

[INFO] +- org.springframework.boot:spring-boot-starter-remote-shell:jar:1.2.3.RELEASE:compile
[INFO] |  +- org.springframework.boot:spring-boot-starter-actuator:jar:1.2.3.RELEASE:compile
[INFO] |  |  \- org.springframework.boot:spring-boot-actuator:jar:1.2.3.RELEASE:compile
[INFO] |  +- org.crashub:crash.cli:jar:1.3.1:compile
[INFO] |  +- org.crashub:crash.connectors.ssh:jar:1.3.1:compile
[INFO] |  |  +- org.apache.sshd:sshd-core:jar:0.11.0:compile <===THIS ONE===
[INFO] |  |  +- org.apache.sshd:sshd-pam:jar:0.11.0:compile
[INFO] |  |  |  \- net.sf.jpam:jpam:jar:1.1:compile
[INFO] |  |  +- org.bouncycastle:bcprov-jdk15on:jar:1.51:compile
[INFO] |  |  +- org.bouncycastle:bcpkix-jdk15on:jar:1.51:compile
[INFO] |  |  \- org.apache.mina:mina-core:jar:2.0.7:compile
[INFO] |  +- org.crashub:crash.embed.spring:jar:1.3.1:compile
[INFO] |  +- org.crashub:crash.plugins.cron:jar:1.3.1:compile
[INFO] |  |  \- it.sauronsoftware.cron4j:cron4j:jar:2.2.5:compile
[INFO] |  +- org.crashub:crash.plugins.mail:jar:1.3.1:compile
[INFO] |  |  \- javax.mail:mail:jar:1.4:compile
[INFO] |  |     \- javax.activation:activation:jar:1.1:compile
[INFO] |  +- org.crashub:crash.shell:jar:1.3.1:compile
[INFO] |  \- org.codehaus.groovy:groovy:jar:2.3.11:compile

再次快速查看您的堆栈跟踪发现您在类路径上似乎有不同的版本 at org.apache.sshd.common.keyprovider.AbstractKeyPairProvider.getKeyTypes(AbstractKeyPairProvider.java:49) ~[sshd-core-0.6.0.jar:0.6.0]所以我接下来要做的就是在 pom.xml 中手动指定这个版本作为依赖项。当我重新运行应用程序并尝试通过 SSH 连接时，我遇到了与您相同的异常。

同时查看类(class)，AbstractKeyPairProvider.loadKeys()方法具有不同的签名，这很可能会根据 0.11.0 合约的不同导致实现困惑，例如 URLKeyPairProvider :

• 0.6.0 protected abstract KeyPair[] loadKeys();
• 0.11.0 public abstract Iterable<KeyPair> loadKeys();

因此，要么您无意中添加了此版本，要么您的某些其他依赖项正在引用它，从而有效地遮蔽 0.11.0在类路径上。就我而言，我启用了 spring boot actuator HTTP endpoints确认上述内容:

总之，检查您的依赖关系树并找出 sshd-core 0.6.0 在哪里也许mina-core 2.0.2来自并排除它们。