Can't Connect

[amardilo]

Hi there,

I am using SSHTools 0.2.9 (running on Java 2 SDK 1.4.1). But I can connect to any SSH servers (I can however connect to those servers via PuTTY and WinSCP and other SSH clients).

The code falls over on the connect.

    sshClient = new SshClient();
    sshClient.connect(someIPAddress);

The output I see on my web browser is:

> root cause
>
> java.lang.NoClassDefFoundError:
> java/util/concurrent/ConcurrentHashMap
> at
> com.sshtools.j2ssh.connection.ConnectionProtocol.(Unknown
> Source) at
> com.sshtools.j2ssh.SshClient.connect(Unknown
> Source) at
> com.sshtools.j2ssh.SshClient.connect(Unknown
> Source) at
> com.sshtools.j2ssh.SshClient.connect(Unknown
> Source) at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
> org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
> org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
> at
> org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
> org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
> at
> org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
> at
> java.lang.Thread.run(Thread.java:536)

Also in my output browser the last few lines are:

> 21-Oct-2009 17:47:28
> com.sshtools.j2ssh.transport.TransportProtocolCommon
> negotiateVersion INFO: Negotiating
> protocol version 21-Oct-2009 17:47:28
> com.sshtools.j2ssh.transport.TransportProtocolCommon
> negotiateVersion INFO: Protocol
> negotiation complete 21-Oct-2009
> 17:47:28
> com.sshtools.j2ssh.transport.TransportProtocolCommon
> beginKeyExchange INFO: Starting key
> exchange 21-Oct-2009 17:47:28
> com.sshtools.j2ssh.transport.kex.DhGroup1Sha1
> performClientExchange INFO: Starting
> client side key exchange. 21-Oct-2009
> 17:47:29
> com.sshtools.j2ssh.transport.AbstractKnownHostsKeyVerification
> verifyHost INFO: Verifying
> 10.100.100.251 host key 21-Oct-2009 17:47:29
> com.sshtools.j2ssh.transport.TransportProtocolClient
> verifyHostKey INFO: The host key
> signature is  valid 21-Oct-2009
> 17:47:29
> com.sshtools.j2ssh.transport.TransportProtocolCommon
> completeKeyExchange INFO: Completing
> key exchange 21-Oct-2009 17:47:29
> com.sshtools.j2ssh.transport.cipher.SshCipherFactory
> newInstance INFO: Creating new
> blowfish-cbc cipher instance
> 21-Oct-2009 17:47:29
> com.sshtools.j2ssh.transport.cipher.SshCipherFactory
> newInstance INFO: Creating new
> blowfish-cbc cipher instance

Can anyone help?

[Pat]

java/util/concurrent/ConcurrentHashMap was added in Java 1.5.  So, you need to either switch to 1.5 or use an older version of j2ssh.

[amardilo]

that's perfect thanks for that.

Do you know which versions of SSHTools works with my version of Java?