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From "Francis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CAMEL-10946) camel-ftp: knownHostsUri configuration with camel 2.18.2
Date Mon, 06 Mar 2017 10:52:33 GMT

     [ https://issues.apache.org/jira/browse/CAMEL-10946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Francis updated CAMEL-10946:
----------------------------
    Description:     (was: I have a known_hosts file on my classpath and I want the ftp-component
to use this known_hosts file when connecting to an sftp server (and not be dependent on the
~/.ssh/known_hosts file). 
The documentation (http://camel.apache.org/ftp2.html) mentions that u can use the option knownHostsUri
to configure the (classpath) location of a known_hosts file. 
When using this option (in combination with the option useUserKnownHostsFile=false), camel
fails to connect to the server because of a NullPointerException (see below). 
When debugging, it seems that the list of known_hosts from the classpath are first loaded
succesfully (SftpOperations:268) but afterwards the known_hosts are ALWAYS overridden (SftpOperations:284).
When setting the option useUserKnownHostsFile to false, there is no file to load (no fallback
to the known_hosts file from the home directory) and the exception is thrown. 
I made a small github project (https://github.com/johanvandeweerd/camel-sftp) that can be
cloned and run to reproduce the error. You can play with the options in SftpRouteBuilder.


Stacktrace:
{code}
2017-01-17 18:19:33.397  WARN 2652 --- [           main] o.a.c.c.file.remote.SftpConsumer
        : Error auto creating directory: pub/example due Cannot connect to sftp://demo@test.rebex.net:22.
This exception is ignored. 

org.apache.camel.component.file.GenericFileOperationFailedException: Cannot connect to sftp://demo@test.rebex.net:22

        at org.apache.camel.component.file.remote.SftpOperations.connect(SftpOperations.java:146)
~[camel-ftp-2.18.1.jar:2.18.1] 
        at org.apache.camel.component.file.remote.RemoteFileConsumer.connectIfNecessary(RemoteFileConsumer.java:203)
~[camel-ftp-2.18.1.jar:2.18.1] 
        at org.apache.camel.component.file.remote.SftpConsumer.doStart(SftpConsumer.java:53)
~[camel-ftp-2.18.1.jar:2.18.1] 
        at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [camel-core-2.18.1.jar:2.18.1]

        at org.apache.camel.impl.DefaultCamelContext.startService(DefaultCamelContext.java:3371)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRouteConsumers(DefaultCamelContext.java:3688)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doStartRouteConsumers(DefaultCamelContext.java:3624)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:3544)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:3308)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:3162)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.access$000(DefaultCamelContext.java:182)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:2957)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:2953)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doWithDefinedClassLoader(DefaultCamelContext.java:2976)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:2953)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [camel-core-2.18.1.jar:2.18.1]

        at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:2920)
[camel-core-2.18.1.jar:2.18.1] 
        at org.apache.camel.spring.boot.RoutesCollector.maybeStart(RoutesCollector.java:141)
[camel-spring-boot-2.18.1.jar:2.18.1] 
        at org.apache.camel.spring.boot.RoutesCollector.onApplicationEvent(RoutesCollector.java:116)
[camel-spring-boot-2.18.1.jar:2.18.1] 
        at org.apache.camel.spring.boot.RoutesCollector.onApplicationEvent(RoutesCollector.java:41)
[camel-spring-boot-2.18.1.jar:2.18.1] 
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144)
[spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE] 
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
[spring-context-4.3.5.RELEASE.jar:4.3.5.RELEASE] 
        at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
[spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE] 
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761)
[spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE] 
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371)
[spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE] 
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE]

        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE]

        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.3.RELEASE.jar:1.4.3.RELEASE]

        at be.engine31.camel.Application.main(Application.java:10) [classes/:na] 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_91] 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_91]

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[na:1.8.0_91] 
        at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_91] 
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]

Caused by: java.lang.NullPointerException: null 
        at com.jcraft.jsch.Util.checkTilde(Util.java:489) ~[jsch-0.1.54.jar:na] 
        at com.jcraft.jsch.KnownHosts.setKnownHosts(KnownHosts.java:54) ~[jsch-0.1.54.jar:na]

        at com.jcraft.jsch.JSch.setKnownHosts(JSch.java:317) ~[jsch-0.1.54.jar:na] 
        at org.apache.camel.component.file.remote.SftpOperations.createSession(SftpOperations.java:284)
~[camel-ftp-2.18.1.jar:2.18.1] 
        at org.apache.camel.component.file.remote.SftpOperations.connect(SftpOperations.java:115)
~[camel-ftp-2.18.1.jar:2.18.1] 
        ... 38 common frames omitted
{code})

> camel-ftp: knownHostsUri configuration with camel 2.18.2
> --------------------------------------------------------
>
>                 Key: CAMEL-10946
>                 URL: https://issues.apache.org/jira/browse/CAMEL-10946
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-ftp
>    Affects Versions: 2.18.2
>            Reporter: Francis
>            Assignee: Claus Ibsen
>            Priority: Minor
>




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